ACS72981KLRATR-150B3 [ALLEGRO]
Current Sensor IC with 200 μΩ Current Conductor;
| 型号： | ACS72981KLRATR-150B3 |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Current Sensor IC with 200 μΩ Current Conductor |
| 文件： | 总54页 (文件大小：3584K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACS72981xLR
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
FEATURES AND BENEFITS
DESCRIPTION
• AEC-Q100 automotive qualification
• High-bandwidth 250 kHz analog output
• Less than 2 μs output response time
• 3.3 V and 5 V supply operation
• Ultralow power loss: 200 μΩ internal conductor
resistance
• Industry-leading noise performance and increased
bandwidth through proprietary amplifier and filter design
techniques
• Greatly improved total output error through digitally
programmed and compensated gain and offset over the
full operating temperature range
• Small package size, with easy mounting capability
• Monolithic Hall IC for high reliability
• Output voltage proportional to AC or DC currents
• Factory-trimmed for accuracy
• Extremely stable zero amp output offset voltage over
temperature and lifetime
TheAllegro™ACS72981familyofcurrentsensorICsprovides
economicalandprecisesolutionsforACorDCcurrentsensing.
A 250 kHz bandwidth makes it ideal for motor control, load
detection and management, power supply and DC-to-DC
converter control, and inverter control. The <2 µs response
time enables overcurrent fault detection in safety-critical
applications.
The device consists of a precision, low-offset linear Hall
circuit with a copper conduction path located near the die.
Applied current flowing through this copper conduction path
generates a magnetic field which the Hall IC converts into a
proportionalvoltage.Deviceaccuracyisoptimizedthroughthe
close proximity of the magnetic signal to the Hall transducer.
A precise, proportional output voltage is provided by the
low-offset, chopper-stabilized BiCMOS Hall IC, which is
programmed for accuracy at the factory. Proprietary digital
temperature compensation technology greatly improves the
zero output voltage and output sensitivity accuracy over
temperature and lifetime.
The output of the device increases when an increasing current
flows through the primary copper conduction path (from
terminal 5 to terminal 6), which is the path used for current
sampling. The internal resistance of this conductive path is
200μΩtypical,providinglowpowerlossandincreasingpower
density in the application.
PACKAGE:
7-pin PSOF package (suffix LR)
Thesensoremploysdifferentialsensingtechniquesthatvirtually
eliminate output disturbance due to common-mode interfering
magnetic field.
Not to scale
Continued on the next page…
ACS72981xLR
3
2
5
6
VIOUT
GND
IP+
VOUT
CL
IP
Supply
CBYP
0.1 µF
IP–
1
VCC
Typical Application
The ACS72981xLR outputs an analog signal, VOUT, that varies linearly with the
bidirectional AC or DC primary sampled current, IP, within the range specified.
ACS72981xLR-DS, Rev. 9
MCO-0000374
September 24, 2020
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
DESCRIPTION (CONTINUED)
The thickness of the copper conductor allows survival of the device The device is fully calibrated prior to shipment from the factory.
at high overcurrent conditions. The terminals of the conductive path The ACS72981 family is lead (Pb) free. All leads are plated with
are electrically isolated from the signal leads (pins 1 through 3).
100% matte tin, and there is no Pb inside the package. The heavy
gauge leadframe is made of oxygen-free copper.
SELECTION GUIDE
Sensitivity
Sens (Typ.)
(mV/A)[1]
Primary Sampled Current,
Nominal Supply
Voltage (V)
TA
(°C)
Part Number
Packing[2]
IP (A)
ACS72981LLRATR-050B3
ACS72981LLRATR-050B5
ACS72981LLRATR-050U3
ACS72981LLRATR-050U5
ACS72981LLRATR-100B3
ACS72981LLRATR-100B5
ACS72981LLRATR-100U3
ACS72981LLRATR-100U5
ACS72981KLRATR-150B3
ACS72981KLRATR-150B5
ACS72981KLRATR-150U3
ACS72981KLRATR-150U5
ACS72981ELRATR-200B3
ACS72981ELRATR-200B5
ACS72981ELRATR-200U3
ACS72981ELRATR-200U5
±50
±50
50
26.4
40
3.3
5
52.8
80
3.3
5
50
–40 to 150
±100
±100
100
100
±150
±150
150
150
±200
±200
200
200
13.2
20
3.3
5
26.4
40
3.3
5
3000 pieces per 13-inch reel
8.8
3.3
5
13.33
17.6
26.66
6.6
–40 to 125
–40 to 85
3.3
5
3.3
5
10
13.2
20
3.3
5
[1] Measured at nominal supply voltage.
[2] Contact Allegro for additional packing options.
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ꢄ
ꢄRA ꢒR
-
050
ꢅ
5
Sꢆꢇꢇly ꢈoltageꢉ
5 ꢊ ꢈꢀꢀ ꢋ 5 ꢈ
3 ꢊ ꢈꢀꢀ ꢋ 3.3 ꢈ
ꢌꢆtꢇꢆt ꢍirectionalityꢉ
ꢅ ꢊ ꢅidirectional ꢎꢇositiꢏe and negatiꢏe cꢆrrentꢐ
U ꢊ Unidirectional ꢎonly ꢇositiꢏe cꢆrrentꢐ
ꢀꢆrrent Sensing Range ꢎAꢐ
Pacꢑing ꢍesignator
Pacꢑage ꢍesignator
ꢌꢇerating ꢒemꢇeratꢆre Range
5 ꢍigit Part Nꢆmꢓer
Allegro ꢀꢆrrent Sensor
2
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Output Voltage
Symbol
Notes
Rating
6.5
Unit
V
VCC
VRCC
–0.5
V
VIOUT
6.5
V
Reverse Output Voltage
Output Current
VRIOUT
IOUT
VWORKING
ICMAX
–0.5
V
Maximum survivable sink or source current through the output
10
mA
V
Working Voltage
Voltage applied between pins 5-6 and all other pins
±100
Maximum Continuous Current
TA = 25°C
Range E
Range K
Range L
120
A
–40 to 85
–40 to 125
–40 to 150
165
°C
°C
°C
°C
°C
Nominal Operating Ambient
Temperature
TA
Maximum Junction Temperature
Storage Temperature
TJ(max)
Tstg
–65 to 165
ESD RATINGS
Characteristic
Symbol
VHBM
Test Conditions
Per AEC-Q100
Value
±12
±1
Unit
Human Body Model
Charged Device Model
kV
kV
VCDM
Per AEC-Q100
TYPICAL OVERCURRENT CAPABILITIES[1][2]
Characteristic
Symbol
Notes
Rating
285
Unit
A
TA = 25°C, 1 second on time, 60 seconds off time
TA = 85°C, 1 second on time, 35 seconds off time
TA = 125°C, 1 second on time, 30 seconds off time
TA = 150°C, 1 second on time, 10 seconds off time
225
A
Overcurrent
IPOC
170
A
95
A
[1] Test was done with Allegro evaluation board. The maximum allowed current is limited by TJ(max) only.
[2] For more overcurrent profiles, see application note “Secrets of Measuring Currents Above 50 Amps”, https://www.allegromicro.com/en/Design-Cen-
ter/Technical-Documents/Hall-Effect-Sensor-IC-Publications/AN296141-Secrets-of-Measuring-Currents-Above-50-Amps.aspx, on the Allegro website,
www.allegromicro.com.
THERMAL CHARACTERISTICS: May require derating at maximum conditions
Characteristic
Symbol
Test Conditions [1]
Value
Unit
Mounted on the Allegro evaluation board ASEK72981
with FR4 substrate and 8 layers of 2 oz. copper (with an
area of 1530 mm2 per layer) connected to the primary
leadframe and with thermal vias connecting the copper
layers. Performance is based on current flowing through
the primary leadframe and includes the power consumed
by the PCB.
Package Thermal Resistance
RθJA
18
°C/W
[1] Additional thermal information available on the Allegro website
3
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
Functional Block Diagram
IP+
ACS72981xLR
VCC
To all subcircuits
CBYPASS
Undervoltage
Detection [1]
Programming Control
Hall Current
Drive
Temperature Sensor
EEPROM and Control Logic
Offset
Control
Output
Clamps
Active Temperature
Compensation
Sensitivity Control
VIOUT
Signal Recovery
CL
IP–
GND
[1] Undervoltage Detection in disabled when the supply voltage is configured to 3.3 V.
NC
Terminal List Table
4
Number
Name
Description
VIOUT
GND
3
2
1
IP+
IP–
5
6
1
2
3
VCC
Device power supply terminal
Device ground terminal
Analog output signal
GND
VIOUT
VCC
No connection; connect to GND for optimal
ESD performance
7
NC
4
NC
5
6
IP+
IP–
Positive terminal for current being sampled
Negative terminal for current being sampled
Pinout Diagram
No connection; connect to GND for optimal
ESD performance
7
NC
4
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
COMMON OPERATING CHARACTERISTICS [1]: Valid through full range of TA and at nominal supply voltage, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [2]
Max.
Unit
ELECTRICAL CHARACTERISTICS
5 V nominal supply voltage variant
3.3 V nominal supply voltage variant
VCC(min) ≤ VCC ≤ VCC(max), no load on output
TA = 25°C
4.5
5
3.3
14
70
3.8
3.7
74
7
5.5
V
V
Supply Voltage
VCC
3
3.6
Supply Current
ICC
tPO
–
–
mA
µs
V
Power-On Delay [3]
–
–
VUVLOD
VUVLOE
tUVLOE
tUVLOD
VPORH
VPORL
VHys(POR)
BWi
VCC rising; UVLO is disabled, enabling the device output
VCC falling; UVLO is enabled, disabling the device output
Time measured from falling VCC < VUVLOE to UVLO enabled
Time measured from rising VCC > VUVLOD to UVLO disabled
VCC rising
–
4.2
Undervoltage Lockout (UVLO)
Threshold[4]
–
–
V
–
–
µs
µs
V
UVLO Enable/Disable
Delay Time
–
–
–
2.8
2.5
250
250
1.5
1
–
Power-On Reset Voltage
VCC falling
–
–
V
Power-On Reset Hysteresis
Internal Bandwidth
–
–
mV
kHz
µs
µs
µs
V/µs
Ω
Small signal –3 dB, CL = 1 nF
–
–
Rise Time[3]
tr
TA = 25°C, CL = 1 nF, 1 V step on output
TA = 25°C, CL = 1 nF, 1 V step on output
TA = 25°C, CL = 1 nF, 1 V step on output
TA = 25°C, CL = 1 nF, 1 V step on output
–
–
Propagation Delay Time [3]
Response Time [3]
tpd
–
–
tRESPONSE
SR
–
1.8
0.53
< 1
–
–
Output Slew Rate
–
–
DC Output Impedance
Output Load Resistance
Output Load Capacitance
Primary Conductor Resistance
ROUT
–
–
RLOAD(MIN) VIOUT to GND
CLOAD(MAX) VIOUT to GND
4.7
–
kΩ
nF
µΩ
V
–
1
10
RPRIMARY
VCLP(HIGH)
VCLP(LOW)
tCLP
TA = 25°C
–
200
–
–
TA = 25°C, RL(PULLDWN) = 10 kΩ to GND
TA = 25°C, RL(PULLUP) = 10 kΩ to VCC
TA = 25°C; CL = 1nF; Step on IP from 0.75 IPR to 1.5 IPR
TA = 25°C, RL(PULLDWN) = 10 kΩ to GND
TA = 25°C, RL(PULLUP) = 10 kΩ to VCC
0.9 × VCC
–
Output Voltage Clamp
Delay to Clamp
–
–
0.1 × VCC
V
–
VCC – 0.2
–
5
–
–
µs
V
VSAT(HIGH)
VSAT(LOW)
–
Output Saturation Voltage
–
200
mV
ERROR COMPONENTS
QVO Ratiometry Error [5]
Sens Ratiometry Error [5]
Clamp Ratiometry Error [5]
VRatERRQVO VCC = ±5% variation of nominal supply voltage
RatERRSens VCC = ±5% variation of nominal supply voltage
RatERRCLP VCC = ±5% variation of nominal supply voltage
–
–
–
±3.5
±0.6
±1.0
–
–
–
mV
%
%
mARMS
/√(Hz)
Noise [5]
VN
TA = 25°C, CL = 1 nF
–
0.4
–
Nonlinearity [5]
Symmetry [5]
ELIN
Up to full-scale IP; IP applied for 5 ms
Over half-scale IP
–0.8
–
±0.45
±0.25
0.8
–
%
%
ESYM
Common Mode Field Offset
Error Ratio
CMFROFF
Measured at 100 G
–
2
–
mA/G
[1] Device may be operated at higher primary current levels, IP, ambient, TA, and internal leadframe temperatures, TA, provided that the Maximum Junction Temperature,
TJ(max), is not exceeded.
[2] All typical values are ±3 sigma.
[3] See Definitions of Dynamic Response Characteristics section of this datasheet.
[4] UVLO feature is only available on part numbers programmed with a 5 V nominal supply voltage.
[5] See Definitions of Accuracy Characteristics section of this datasheet.
5
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X050B3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–50
–
–
50
–
A
mV/A
V
26.4 ×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
–
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
42
7
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
6
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X050B5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–50
–
–
50
–
A
mV/A
V
40×
VCC /5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
–
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
60
10
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
7
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X050U3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
50
–
A
mV/A
V
52.8 ×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
78
13
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
8
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X050U5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
50
–
A
mV/A
V
80 ×
VCC / 5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
120
20
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
9
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X100B3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–100
–
100
–
A
mV/A
V
13.2 ×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
–
–
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
18
3
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
10
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X100B5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–100
–
100
–
A
mV/A
V
20×
VCC /5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
–
–
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
30
5
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
11
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X100U3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
100
–
A
mV/A
V
26.4 ×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
42
7
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
12
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X100U5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 150°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
100
–
A
mV/A
V
40 ×
VCC / 5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
60
10
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 150°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 150°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 150°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 150°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 150°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
13
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X150B3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 125°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–150
–
150
–
A
mV/A
V
8.8×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
–
–
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
13.2
2.2
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 125°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 125°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 125°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 125°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
14
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X150B5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 125°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–150
–
150
–
A
mV/A
V
13.33×
VCC / 5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
–
–
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
20.4
3.4
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 125°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 125°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 125°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 125°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
15
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X150U3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 125°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
150
–
A
mV/A
V
17.6 ×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
24
4
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 125°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 125°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 125°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 125°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
16
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X150U5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 125°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
150
–
A
mV/A
V
26.66 ×
VCC / 5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
42
7
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 125°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 125°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 125°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 125°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 125°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
17
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X200U3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 85°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
200
–
A
mV/A
V
13.2 ×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
18
3
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 85°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 85°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 85°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 85°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
18
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X200U5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 85°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
0
–
–
–
200
–
A
mV/A
V
20 ×
VCC / 5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
VCC/10
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
30
5
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 85°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 85°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 85°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 85°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
19
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X200B3 PERFORMANCE CHARACTERISTICS: TA = –40°C to 85°C, VCC= 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–200
–
200
–
A
mV/A
V
6.6 ×
VCC / 3.3
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
–
–
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
12
2
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 85°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 85°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 85°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 85°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
20
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
X200B5 PERFORMANCE CHARACTERISTICS: TA = –40°C to 85°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NOMINAL PERFORMANCE
Current Sensing Range
IPR
–200
–
200
–
A
mV/A
V
10 ×
VCC / 5
Sensitivity [2]
Sens
VCC(min) ≤ VCC ≤ VCC(max), IPR(min) < IP < IPR(max)
–
–
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
VCC/2
–
ACCURACY PERFORMANCE
TA = 25°C, CL = 1 nF, BW = 250 kHz
TA = 25°C, CL = 1 nF, BW = 250 kHz
IP = 37.5 A applied for 5 ms, TA = 25°C
IP = 37.5 A applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A applied for 5 ms, TOP = –40°C to 25°C
IP = 0 A, TA = 25°C
–
18
3
–
–
mVp-p
mVRMS
%
Noise [2]
VN
–
–3.25
–3.25
–3.75
–5
±2.25
±2.25
±3.5
±3.3
±3.3
±8
3.25
3.25
3.75
5
Sensitivity Error [2]
ESens
%
%
mV
mV
mV
%
Electrical Offset Error [2]
Total Output Error [2]
VOE
IP = 0 A, TOP = 25°C to 85°C
–5
5
IP = 0 A, TOP = –40°C to 25°C
–10
10
IP = 37.5 A, IP applied for 5 ms, TOP = 25°C to 85°C
IP = 37.5 A, IP applied for 5 ms, TOP = –40°C to 25°C
–3.25
–3.75
±2.25
±3.5
3.25
3.75
ETOT
%
LIFETIME ACCURACY CHARACTERISTICS [3]
ESens(LIFE)(HT) TOP = 25°C to 85°C
–3.7
–4.1
–3.7
–4.1
–7.0
–12.0
±2.7
±3.7
±2.7
±3.7
±4.7
±5.5
3.7
4.1
3.7
4.1
7.0
12.0
%
%
Sensitivity Error Including
Lifetime
ESens(LIFE)(LT) TOP = –40°C to 25°C
ETOT(LIFE)(HT) TOP = 25°C to 85°C
ETOT(LIFE)(LT) TOP = –40°C to 25°C
EOFF(LIFE)(HT) TOP = 25°C to 85°C
EOFF(LIFE)(LT) TOP = –40°C to 25°C
%
Total Output Including
Lifetime
%
mV
mV
Electric Offset Error Including
Lifetime
[1] All typical values are ±3 sigma.
[2] See Definitions of Accuracy Characteristics section of this datasheet.
[3] Lifetime Accuracy Characteristics are based off of qualification testing to AEC-Q100 Grade 0 level.
21
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
Response Time (tRESPONSE
)
25 A excitation signal with 10%-90% rise time = 1 μs
Sensitivity = 40 mV/A, CBYPASS = 0.1 μF, CL = 1 nF
Propagation Delay (tpd)
25 A excitation signal with 10%-90% rise time = 1 μs
Sensitivity = 40 mV/A, CBYPASS = 0.1 μF, CL = 1 nF
22
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
Rise Time (tr)
25 A excitation signal with 10%-90% rise time = 1 μs
Sensitivity = 40 mV/A, CBYPASS = 0.1 μF, CL = 1 nF
23
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
UVLO Enable Time (tUVLOE
)
VCC 5 V to 3 V fall time = 1.5 μs
Sensitivity = 40 mV/A, CBYPASS = 0.1 μF, CL = 1 nF
UVLO Disable Time (tUVLOD
)
VCC 3 V to 5 V recovery time = 1.5 μs
Sensitivity = 40 mV/A, CBYPASS = 0.1 μF, CL = 1 nF
24
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
Power-On Example Curve
Sensitivity = 40 mV/A, CBYPASS = 0.1 μF, CL = 1 nF, RL(PULLUP) = 4.7 kΩ, IP = 50 A
Power-On Time (tPO
)
Sensitivity = 40 mV/A, CBYPASS = 0.1 μF, CL = 1 nF, IP = 50 A
25
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-050B3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
20
15
10
5
1670
1665
1660
1655
1650
1645
1640
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
0
-50
0
50
100
150
-5
-50
0
50
100
150
-10
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
3.000
2.500
2.000
1.500
1.000
0.500
0.000
-0.500
-1.000
-1.500
-2.000
27
27
27
27
26
26
26
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
4.0
3.0
2.0
1.0
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1.0
-2.0
Temperature (°C)
Temperature (°C)
26
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-050B5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
8
6
2508
2506
2504
2502
2500
2498
2496
2494
2492
2490
4
2
0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-2
-4
-6
-8
-10
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
2.500
2.000
1.500
1.000
0.500
0.000
-0.500
-1.000
-1.500
-2.000
41
41
41
40
40
40
40
40
39
39
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.3
0.2
2.5
2.0
1.5
1.0
0.5
0.0
0.1
0.0
-50
0
50
100
150
Me an
Me an
-0.1
-0.2
-0.3
-0.4
-0.5
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.5
-1.0
-1.5
-2.0
Temperature (°C)
Temperature (°C)
27
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-050U3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
20
15
10
5
350
345
340
335
330
325
320
315
310
Me an
Me an
0
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-5
-10
-15
-20
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
4.000
3.000
2.000
1.000
0.000
-1.000
-2.000
-3.000
55
55
54
54
53
53
52
52
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
4.0
3.0
2.0
1.0
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1.0
-2.0
-3.0
Temperature (°C)
Temperature (°C)
28
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-050U5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
15
10
5
515
510
505
500
495
490
485
480
0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-5
-10
-15
-20
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
5.000
4.000
3.000
2.000
1.000
0.000
-1.000
-2.000
-3.000
-4.000
84
83
82
81
80
79
78
77
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.8
0.6
5.0
4.0
3.0
2.0
1.0
0.0
0.4
0.2
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
0.0
-50
0
50
100
150
-50
0
50
100
150
-1.0
-2.0
-3.0
-4.0
-0.2
-0.4
-0.6
Temperature (°C)
Temperature (°C)
29
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-100B3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
10
8
1660
1658
1656
1654
1652
1650
1648
1646
1644
1642
6
4
2
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
0
-50
0
50
100
150
-2
-4
-6
-8
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
4.000
3.000
2.000
1.000
0.000
-1.000
-2.000
-3.000
14
14
14
13
13
13
13
13
13
13
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
4.0
3.0
2.0
1.0
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1.0
-2.0
-3.0
-4.0
Temperature (°C)
Temperature (°C)
30
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-100B5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
4
3
2504
2503
2502
2501
2500
2499
2498
2497
2496
2495
2
1
0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-1
-2
-3
-4
-5
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
2.000
1.500
1.000
0.500
0.000
20
20
20
20
20
20
20
20
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.500
-1.000
-1.500
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.3
0.2
2.0
1.5
1.0
0.5
0.0
0.1
0.0
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.5
-1.0
-1.5
Temperature (°C)
Temperature (°C)
31
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-100U3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
10
8
340
338
336
334
332
330
328
326
324
322
320
6
4
2
Me an
Me an
0
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-2
-4
-6
-8
-10
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0.000
-0.500
-1.000
-1.500
-2.000
27
27
27
27
27
26
26
26
26
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
4.0
3.0
2.0
1.0
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1.0
-2.0
Temperature (°C)
Temperature (°C)
32
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981LLRATR-100U5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
6
4
506
504
502
500
498
496
494
492
2
0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-2
-4
-6
-8
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
4.000
3.000
2.000
1.000
0.000
42
41
41
40
40
39
39
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1.000
-2.000
-3.000
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
4.0
3.0
2.0
1.0
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1.0
-2.0
-3.0
Temperature (°C)
Temperature (°C)
33
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981KLRATR-150B3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
5
4
1655
1654
1653
1652
1651
1650
1649
1648
1647
1646
3
2
1
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
0
-50
0
50
100
150
-1
-2
-3
-4
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0.000
9
9
9
9
9
9
9
9
9
9
9
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.500
-1.000
-1.500
-2.000
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.2
4.0
3.0
2.0
1.0
0.0
0.1
0.0
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1.0
-2.0
-3.0
Temperature (°C)
Temperature (°C)
34
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981KLRATR-150B5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
4
3
2504
2503
2502
2501
2500
2499
2498
2497
2496
2495
2
1
0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
-1
-2
-3
-4
-5
+3 Sigma
-3 Sigma
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
1.000
0.500
0.000
13
13
13
13
13
13
13
13
13
13
-50
0
50
100
150
-0.500
-1.000
-1.500
-2.000
-2.500
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.3
0.2
1.0
0.5
0.0
0.1
0.0
-50
0
50
100
150
-50
0
50
100
150
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
Temperature (°C)
Temperature (°C)
35
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981KLRATR-150U3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
8
6
338
336
334
332
330
328
326
324
322
4
2
Me an
Me an
0
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-2
-4
-6
-8
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
2.500
2.000
1.500
1.000
0.500
0.000
18
18
18
18
18
18
17
17
17
17
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.500
-1.000
-1.500
-2.000
-2.500
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
3.0
2.0
1.0
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-0.1
-0.2
-0.3
-0.4
-0.5
-50
0
50
100
150
-1.0
-2.0
-3.0
Temperature (°C)
Temperature (°C)
36
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981KLRATR-150U5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
4
3
504
503
502
501
500
499
498
497
496
495
494
2
1
0
Me an
Me an
-50
0
50
100
150
-1
-2
-3
-4
-5
-6
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
3.000
2.500
2.000
1.500
1.000
0.500
0.000
28
27
27
27
27
27
26
26
26
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.500
-1.000
-1.500
-2.000
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-0.1
-0.2
-0.3
-0.4
-0.5
-50
0
50
100
150
-0.5
-1.0
-1.5
-2.0
Temperature (°C)
Temperature (°C)
37
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981ELRATR-200U3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
6
4
336
334
332
330
328
326
324
2
Me an
Me an
0
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-2
-4
-6
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
1.500
1.000
0.500
0.000
13
13
13
13
13
13
13
13
13
13
13
-50
0
50
100
150
Me an
Me an
-0.500
-1.000
-1.500
-2.000
-2.500
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.5
0.4
2.0
1.5
1.0
0.5
0.0
0.3
0.2
0.1
Me an
Me an
0.0
-50
0
50
100
150
-50
0
50
100
150
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-0.5
-1.0
-1.5
-2.0
-2.5
Temperature (°C)
Temperature (°C)
38
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981ELRATR-200U5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
3
2
503
502
501
500
499
498
497
496
495
1
0
-50
0
50
100
150
Me an
Me an
-1
-2
-3
-4
-5
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0.000
21
21
21
20
20
20
20
20
20
20
20
20
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.500
-1.000
-1.500
-2.000
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.3
0.2
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.1
0.0
-50
0
50
100
150
Me an
Me an
-0.1
-0.2
-0.3
-0.4
-0.5
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.5
-1.0
-1.5
Temperature (°C)
Temperature (°C)
39
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981ELRATR-200B3
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
2
1
1652
1651
1650
1649
1648
1647
1646
1645
1644
1643
1642
1641
0
-50
0
50
100
150
-1
-2
-3
-4
-5
-6
-7
-8
-9
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
2.500
2.000
1.500
1.000
0.500
0.000
7
7
7
7
7
7
7
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.500
-1.000
-1.500
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.1
3.0
2.0
1.0
0.0
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
-50
0
50
100
150
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-1.0
-2.0
-3.0
-4.0
Temperature (°C)
Temperature (°C)
40
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE DATA
ACS72981ELRATR-200B5
Electrical Offset Error vs. Temperature
Zero Current Output Voltage vs. Temperature
4
3
2504
2503
2502
2501
2500
2499
2498
2497
2496
2
1
Me an
Me an
0
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-1
-2
-3
-4
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
2.500
2.000
1.500
1.000
0.500
0.000
10
10
10
10
10
10
10
10
10
10
10
Me an
Me an
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-50
0
50
100
150
-0.500
-1.000
-1.500
-2.000
-2.500
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Output Error vs. Temperature
0.4
0.3
2.5
2.0
1.5
1.0
0.5
0.0
0.2
0.1
0.0
Me an
Me an
-50
0
50
100
150
+3 Sigma
-3 Sigma
+3 Sigma
-3 Sigma
-0.1
-0.2
-0.3
-0.4
-0.5
-50
0
50
100
150
-0.5
-1.0
-1.5
-2.0
-2.5
Temperature (°C)
Temperature (°C)
41
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC PERFORMANCE
TYPICAL FREQUENCY RESPONSE
ACS72981 ꢀreꢁꢂencꢃ Resꢄonse
ꢀ
ꢀ
-ꢀ
-1ꢀ
1
1ꢀ
2
1ꢀ
ꢀ
ꢀ
1ꢀ
ꢀ
ꢀ
1ꢀ
1ꢀ
1ꢀ
ꢀreꢁꢂencꢃ ꢄHꢅꢆ
ꢀꢁ
ꢀ
-ꢀꢁ
-1ꢀꢀ
-1ꢀꢁ
1
1ꢀ
2
ꢀ
ꢀ
ꢀ
ꢀ
1ꢀ
1ꢀ
1ꢀ
1ꢀ
1ꢀ
ꢀreꢁꢂencꢃ ꢄHꢅꢆ
For information regarding bandwidth characterization methods used for the ACS72981, see the “Characterizing System Bandwidth”
application note (https://allegromicro.com/en/insights-and-innovations/technical-documents/hall-effect-sensor-ic-publications/
an296169-acs720-bandwidth-testing) on the Allegro website.
42
Allegro MicroSystems
955 Perimeter Road
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHARACTERISTIC DEFINITIONS
Definitions of Accuracy Characteristics
SENSITIVITY (Sens)
RATIOMETRY
The change in sensor IC output in response to a 1 A change
The device features a ratiometric output. This means that the
through the primary conductor. The sensitivity is the product of
the magnetic circuit sensitivity (G/A) (1 G = 0.1 mT) and the
linear IC amplifier gain (mV/G). The linear IC amplifier gain is
programmed at the factory to optimize the sensitivity (mV/A) for
the full-scale current of the device.
quiescent voltage output, VIOUT(Q), and the magnetic sensitivity,
Sens, are proportional to the supply voltage, VCC.The ratiometric
change in the quiescent voltage output is defined as:
┌
│
│
└
┐
│
ꢀCC
ꢀRatERRQVO
=
ꢀIOUTQ(5V)
×
ꢁ ꢀIOUTQ(VCC) × 1000 (mV)
│
┘
5 V
SENSITIVITY ERROR (ESens
)
The sensitivity error is the percent difference between the mea-
sured sensitivity and the ideal sensitivity. For example, in the case
of VCC = 5 V:
and the ratiometric change (%) in sensitivity is defined as:
┌
│
│
│
│
│
└
┐
│
│
│
│
│
┘
Sens(VCC)
Sens(5V)
VCC
SensMeas(5V) – SensIdeal(5V)
ESens
× 100 (%)
=
(
)
SensIDEAL(5V)
RatERRSens
=
1 –
× 100 (%)
NOISE (VN)
(
)
5 V
The noise floor is derived from the thermal and shot noise
observed in Hall elements. Dividing the noise (mV) by the sensi-
tivity (mV/A) provides the smallest current that the device is able
to resolve.
and the ratiometric change (%) in clamp voltage is defined as:
┌
│
│
│
│
│
└
┐
│
│
│
│
│
┘
VCLP(VCC)
VCLP(5V)
VCC
NONLINEARITY (ELIN
)
(
)
RatERRCLP
=
1 –
× 100 (%)
The nonlinearity is a measure of how linear the output of the
sensor IC is over the full current measurement range. The
nonlinearity is calculated as:
5 V
SensIPR(MAX)
SensIPR(HALF)
× 100 (%)
1–
E
LIN
=
[ {
where SensIPR(MAX) is the output of the sensor IC with the maxi-
mum measurement current flowing through it and SensIPR(HALF)
is the output of the sensor IC with half of the maximum measure-
ment current flowing through it.
SYMMETRY (ESYM
)
The degree to which the absolute voltage output from the IC
varies in proportion to either a positive or negative half-scale
primary current. The following equation is used to derive
symmetry:
SensIPR(HALF)
× 100 (%)
ESYM
=
1–
[ {
SensIPR(–HALF)
43
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
ZERO CURRENT OUTPUT VOLTAGE (V
)
IOUT(Q)
accuracy across
temperature
The output of the sensor when the primary current is zero. For a
unipolar supply voltage, it nominally remains at 0.5 × VCC for a
bidirectional device and 0.1 × VCC for a unidirectional device.
increasing
VIOUT (V)
accuracy at
25°C only
For example, in the case of a bidirectional output device, VCC
=
ideal
VIOUT
accuracy across
temperature
5 V translates into VIOUT(Q) = 2.5 V. Variation in VIOUT(Q) can be
attributed to the resolution of the Allegro linear IC quiescent volt-
age trim and thermal drift.
accuracy at
25°C only
ELECTRICAL OFFSET ERROR (VOE
)
IPR(min)
–IP(A)
VIOUT(Q)
The deviation of the device output from its ideal quiescent value
of 0.5 × VCC due to nonmagnetic causes. To convert this voltage
to amperes, divide by the device sensitivity, Sens.
+IP(A)
full scale IP
IPR(max)
TOTAL OUTPUT ERROR (ETOT
)
0 A
The difference between the current measurement from the sensor
IC and the actual current (IP), relative to the actual current. This
is equivalent to the difference between the ideal output voltage
and the actual output voltage, divided by the ideal sensitivity,
relative to the current flowing through the primary conduction
path:
accuracy at
25°C only
decreasing
VIOUT (V)
accuracy across
temperature
Figure 1: Output Voltage versus Sensed Current
V
(I ) – V
(I )
IOUT P
IOUTideal
P
E
(I )
=
P
× 100 (%)
TOT
Sens
(I ) × I
P P
IDEAL
The Total Output Error incorporates all sources of error and is a
function of IP.
+ETOT
At relatively high currents, ETOT will be mostly due to sensitiv-
ity error, and at relatively low currents, ETOT will be mostly due
to Offset Voltage (VOE). In fact, as IP approaches zero, ETOT
approaches infinity due to the offset voltage. This is illustrated
in Figure 1 and Figure 2. Figure 1 shows a distribution of output
voltages versus IP at 25°C and across temperature. Figure 2
shows the corresponding ETOT versus IP.
Across Temperature
25°C Only
–IP
+IP
–ETOT
Figure 2: Total Output Error versus Sensed Current
44
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
Definitions of Dynamic Response Characteristics
POWER-ON TIME (tPO
)
When the supply is ramped to its operating voltage, the device
requires a finite time to power its internal components before
responding to an input magnetic field.
Power-On Time, tPO, is defined as the time it takes for the output
voltage to settle within ±10% of its steady-state value under an
applied magnetic field, after the power supply has reached its
minimum specified operating voltage, VCC(min), as shown in the
chart at right.
Figure 3: Power-On Time (tPO
)
Primary Current
(%)
90
RISE TIME (tr)
The time interval between a) when the sensor reaches 10% of
its full-scale value, and b) when it reaches 90% of its full-scale
value.
V
IOUT
Rise Time, t
r
PROPAGATION DELAY (tpd)
20
10
0
The time interval between a) when the sensed current reaches
20% of its full-scale value, and b) when the sensor output reaches
20% of its full-scale value.
t
Propagation Delay, t
pd
Figure 4: Propagation Delay (tPD) and Rise Time (tr)
RESPONSE TIME (tRESPONSE
)
Primary Current
(%)
90
The time interval between a) when the sensed current reaches
90% of its final value, and b) when the sensor output reaches 90%
of its full-scale value.
V
IOUT
Response Time, t
RESPONSE
0
t
Figure 5: Response Time (tRESPONSE
)
45
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
FUNCTIONAL DESCRIPTION
If VCC does not exceed VUVLOD [2], the output will stay in the
high-impedance state until VCC reaches VUVLOD [3] and then
will go to VCC / 2 after tUVLOD [4].
Power-On Reset (POR) and Undervoltage
Lock-Out (UVLO) Operation –
Nominal Supply Voltage = 5 V
The descriptions in this section assume: temperature = 25°C, no
output load (RL, CL), and no significant magnetic field is present.
•
VCC drops below VCC(min)= 4.5 V. If VCC drops below
VUVLOE [4’, 5], the UVLO Enable Counter starts counting. If
VCC is still below VUVLOE when counter reaches tUVLOE , the
UVLO function will be enabled and the ouput will be pulled
near GND [6]. If VCC exceeds VUVLOE before the UVLO
Enable Counter reaches tUVLOE [5’], the output will continue
to be VCC/2.
•
Power-Up. At power-up, as VCC ramps up, the output is in a
high-impedance state. When VCC crosses VPORH (location [1]
in Figure 6 and [1’] in Figure 7), the POR Release counter
starts counting for tPORR. At this point, if VCC exceeds VUVLOD
[2’], the output will go to VCC / 2 after tUVLOD [3’].
ꢀ
ꢎꢎ
11
10
9
1
ꢇ
3
ꢉ
5
ꢊ
ꢈ
ꢒ
5.0
ꢀ
Uꢀꢁꢂꢄ
Uꢀꢁꢂꢃ
ꢀ
ꢀ
PꢂRH
ꢀ
PꢂRꢁ
tUꢀꢁꢂꢃ
t
Uꢀꢁꢂꢃ
ꢐNꢄ
ꢑime
ꢑime
ꢀ
Sloꢌe ꢍ
ꢏꢇ
ꢂUꢑ
ꢇ.5
ꢀ
ꢎꢎ
t
PꢂRR
t
t
Uꢀꢁꢂꢄ
Uꢀꢁꢂꢄ
ꢐNꢄ
High ꢋmꢌedance
High ꢋmꢌedance
Figure 6: POR and UVLO Operation – Slow Rise Time Case
ꢀ
ꢎꢎ
1ꢆ ꢇꢆ
ꢈꢆ 5ꢆ
ꢊꢆ
ꢉꢆ
3ꢆ
5.0
Uꢀꢁꢂꢄ
Uꢀꢁꢂꢃ
ꢀ
ꢀ
ꢀ
ꢀ
PꢂRH
PꢂRꢁ
ꢅ t
Uꢀꢁꢂꢃ
ꢐNꢄ
ꢑime
ꢑime
t
ꢀ
PꢂRR
ꢂUꢑ
Sloꢌe ꢍ
ꢏꢇ
ꢅt
Sloꢌe ꢍ
ꢏꢇ
Uꢀꢁꢂꢃ
ꢀ
ꢎꢎ
ꢀ
ꢎꢎ
ꢇ.5
t
Uꢀꢁꢂꢄ
ꢐNꢄ
High ꢋmꢌedance
High ꢋmꢌedance
Figure 7: POR and UVLO Operation – Fast Rise Time Case
46
Allegro MicroSystems
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
•
•
Coming out of UVLO. While UVLO is enabled [6], if VCC
exceeds VUVLOD [7], UVLO will be disabled after tUVLOD
and the output will be VCC / 2 [8].
,
Power-Down. As VCC ramps down below VUVLOE [6’, 9], the
UVLO Enable Counter will start counting. If VCC is higher
than VPORL when the counter reaches tUVLOE, the UVLO
function will be enabled and the ouput will be pulled near
GND [10]. The output will enter a high-impedance state as
VCC goes below VPORL [11]. If VCC falls below VPORL before
the UVLO Enable Couner reaches tUVLOE , the output will
transition directly into a high-impedance state [7’].
47
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
VCC drops below VCC(min) = 3 V
Power-On Reset (POR) Only –
Nominal Supply Voltage = 3.3V
If VCC drops below VPORH [3′] but remains higher than VPORL
[4′], the output will continue to be VCC/2.
The descriptions in this section assume: temperature = 25°C, no
output load (RL, CL), and IP = 0 A.
Power-Down
As VCC ramps down below VPORL [3, 5’], the output will enter a
high-impedance state.
Power-Up
At power-up, as VCC ramps up, the output is in a high-impedance
state. When VCC crosses VPORH (location [1] in Figure 8 and
[1′] in Figure 9), the POR Release counter starts counting for
tPO [2, 2′]. At this point, the output will go to VCC/2.
ꢂ
ꢄꢊꢊ
3.3
1
3
ꢄPꢀRH
ꢄPꢀRꢅ
ꢌNꢍ
ꢎime
ꢄꢀUꢎ
tPꢀ
1.ꢆ5
Sloꢈe ꢉ
ꢄꢊꢊ ꢋꢂ
ꢌNꢍ
ꢎime
High ꢇmꢈedance
High ꢇmꢈedance
Figure 8: POR and UVLO Operation – Slow Rise Time Case
1ꢁ
ꢂꢁ
ꢄꢊꢊ
3.3
ꢃꢁ
5ꢁ
3ꢁ
ꢄPꢀRH
ꢄPꢀRꢅ
ꢌNꢍ
ꢎime
ꢎime
ꢄꢀUꢎ
tPꢀ
Sloꢈe ꢉ
ꢄꢊꢊ ꢋꢂ
Sloꢈe ꢉ
ꢄꢊꢊ ꢋꢂ
1.ꢆ5
High ꢇmꢈedance
ꢌNꢍ
High ꢇmꢈedance
Figure 9: POR and UVLO Operation – Fast Rise Time Case
48
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
CHOPPER STABILIZATION TECHNIQUE
When using Hall-effect technology, a limiting factor for
sourced signal then can pass through a low-pass filter, while the
switchpoint accuracy is the small signal voltage developed across modulated DC offset is suppressed.
the Hall element. This voltage is disproportionally small relative
In addition to the removal of the thermal and stress-related offset,
to the offset that can be produced at the output of the Hall sensor
IC. This makes it difficult to process the signal while maintaining
an accurate, reliable output over the specified operating tempera-
ture and voltage ranges.
this novel technique also reduces the amount of thermal noise
in the Hall sensor IC while completely removing the modulated
residue resulting from the chopper operation. The chopper sta-
bilization technique uses a high-frequency sampling clock. For
demodulation process, a sample-and-hold technique is used. This
high-frequency operation allows a greater sampling rate, which
results in higher accuracy and faster signal-processing capability.
This approach desensitizes the chip to the effects of thermal and
mechanical stresses, and produces devices that have extremely
Chopper stabilization is a unique approach used to minimize
Hall offset on the chip. Allegro employs a technique to remove
key sources of the output drift induced by thermal and mechani-
cal stresses. This offset reduction technique is based on a signal
modulation-demodulation process. The undesired offset signal is
separated from the magnetic field-induced signal in the frequency stable quiescent Hall output voltages and precise recoverabil-
domain, through modulation. The subsequent demodulation acts ity after temperature cycling. This technique is made possible
as a modulation process for the offset, causing the magnetic-field- through the use of a BiCMOS process, which allows the use of
induced signal to recover its original spectrum at baseband, while low-offset, low-noise amplifiers in combination with high-density
the DC offset becomes a high-frequency signal. The magnetic-
logic integration and sample-and-hold circuits.
Regulator
Clock/Logic
Hall Element
Amp
Anti-Aliasing
LP Filter
Tuned
Filter
Figure 10: Concept of Chopper Stabilization Technique
49
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
APPLICATION INFORMATION
Field from Nearby Current Path
┌
│
│
│
┐
│
│
│
2 × I
1
1
To best use the CMR capabilities of these devices, the circuit
board containing the ICs should be designed to make the external
magnetic fields on both Hall plates equal. This helps to minimize
error due to external fields generated by the current-carrying
PCB traces themselves. There are three main parameters for each
current-carrying trace that determine the error that it will induce
on an IC: distance from the IC, width of the current-carrying
conductor, and the angle between it and the IC. Figure 11 shows
an example of a current-carrying conductor routed near an IC.
The distance between the device and the conductor, d, is the
distance from the device center to the center of the conductor.
The width of the current path is w. The angle between the device
and the current path, θ, is defined as the angle between a straight
line connecting the two Hall plates and a line perpendicular to the
current path.
Error =
×
–
Cf
Hspace
Hspace
d –
× cosθ d +
× cosθ
2
2
where Hspace is the distance between the two Hall plates and Cf is
the coupling factor of the IC. This coupling factor varies between
the different ICs. The ACS72981 has a coupling factor of 5 to 5.5
G/A, whereas other Allegro ICs can range from 10 to 15 G/A. The
ACS72981 Hspace is 1.9 mm.
Other Layout Practices to Consider
When laying out a board that contains an Allegro current sensor
IC with CMR, the direction and proximity of all current-carrying
paths are important, but they are not the only factors to consider
when optimizing IC performance. Other sources of stray fields
that can contribute to system error include traces that connect to
the IC’s integrated current conductor, as well as the position of
nearby permanent magnets.
The way that the circuit board connects to a current sensor IC
must be planned with care. Common mistakes that can impact
performance are:
I
• The angle of approach of the current path to the IP pins
• Extending the current trace too far beneath the IC
H2
d
θ
H1
THE ANGLE OF APPROACH
One common mistake when using an Allegro current sensor IC
is to bring the current in from an undesirable angle. Figure 12
shows an example of the approach of the current traces to the IC
(in this case, the ACS72981). In this figure, traces are shown for
IP+ and IP–. The light green region is the desired area of approach
for the current trace going to IP+. This region is from 0° to 85°.
This rule applies likewise for the IP– trace.
w
Figure 11: ACS72981 with nearby current path, viewed
from the bottom of the sensor
When it is not possible to keep θ close to 90°, the next best
option is to keep the distance from the current path to the current
sensor IC, d, as large as possible. Assuming that the current path
is at the worst-case angle in relation to the IC, θ = 0° or 180°, the
equation:
The limitation of this region is to prevent the current-carrying
trace from contributing any stray field that can cause error on
the IC output. When the current traces connected to IP are outside
this region, they must be treated as discussed above (Field from a
Nearby Current Path).
50
Allegro MicroSystems
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
Figure 12: ACS72981 Current Trace Approach – the
desired range of the angle θ is from 0° to 85°
ENCROACHMENT UNDER THE IC
In the LR package, the encroachment of the current-carrying
trace under the device actually changes the path of the current
flowing through the IP bus. This can cause a change in the cou-
pling factor of the IP bus to the IC and can significantly reduce
device performance. Using ANSYS Maxwell Electromagnetic
Suites, the current density and magnetic field generated from the
current flow were simulated. In Figure 13, there are results from
two different simulations. The first is the case where the current
trace leading up to the IP bus terminates at the desired point. The
second case is where the current trace encroaches far up the IP
bus. The red arrows in both simulations represent the areas of
high current density. In the simulation with no excess overlap, the
red areas, and hence the current density, are very different from
the simulation with the excess overlap. It was also observed that
the field on H1 was larger when there was no excess overlap.
This can be observed by the darker shade of blue.
Figure 13: Simulations of ACS72981 Leadframe with
Different Overlap of the Current Trace and the IP Bus
51
Allegro MicroSystems
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
The thermal capacity of the ACS72981 should be verified by the
end user in the application’s specific conditions. The maximum
Thermal Rise vs. Primary Current
Self-heating due to the flow of current should be considered dur-
ing the design of any current sensing system. The sensor, printed
circuit board (PCB), and contacts to the PCB will generate heat as
current moves through the system.
junction temperature, TJ(MAX) (165℃), should not be exceeded.
Further information on this application testing is available in
the DC Current Capability and Fuse Characteristics of Current
Sensor ICs with 50 to 200 A Measurement Capability application
note on the Allegro website.
The thermal response is highly dependent on PCB layout, copper
thickness, cooling techniques, and the profile of the injected current.
The current profile includes peak current, current “on-time”, and
duty cycle. While the data presented in this section was collected
with direct current (DC), these numbers may be used to approximate
thermal response for both AC signals and current pulses.
ASEK72981 Evaluation Board Layout
Thermal data shown in Figure 14 and Figure 15 was collected
using the ASEK72981 Evaluation Board (TED-0002378). This
board includes 1530 mm2 of 2 oz. copper (0.0694 mm) connected
to pins 5 and 6 with thermal vias connecting the 8 layers. The
PCB is shown below in Figure 16.
The plot in Figure 14 shows the measured rise in steady-state die
temperature of the ACS72981 versus continuous current at an ambi-
ent temperature, TA, of 25°C. The thermal offset curves may be
directly applied to other values of TA. Conversely, Figure 15 shows
the maximum continuous current at a given TA. Surges beyond the
maximum current listed in Figure 15 are allowed given the maxi-
mum junction temperature, TJ(MAX) (165℃), is not exceeded.
Figure 16: ASEK72981 Evaluation Board
Gerber files for the ASEK72981 evaluation board are available
for download from the Allegro website. See the technical docu-
ments section of the ACS72981 device webpage.
Figure 14: Self Heating in the LR Package
Due to Current Flow
Figure 15: Maximum Continuous Current
at a Given TA
52
Allegro MicroSystems
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
PACKAGE OUTLINE DRAWING
6.40 0.10
1.20 0.10
NNNNN
YYWW
LLLL
+0.05
–0.03
1.79 0.10 ×2
7
0.38
(Plating Included)
Parting Line
0.81 0.10 ×2
1
5º 2º ꢀ2
0.80 0.10
Standard Branding Reference View
D
12º 2º ꢀ2
= Part number
N
Y
1.37 0.20
E1
E
= Last two digits of year of manufacture
= Week of manufacture
= Character 5, 6, 7, 11 of assembly lot
number
0.38 0.10 ×2
E2
W
L
7
4.80 0.10
5º 2º ꢀ2
A
12º 2º ꢀ2
1.56 0.20
0.80 0.10
1.41 0.10 ×2
1.60 0.10 ×2
3.00
B
1
2
1.80 MIN
0.38 0.10 ×3
5
6
0.80
0.90
Branded Face
2.40
12º 2º ꢀ2
0.60
5.60
A
7
4
4.80
+0.03
0.9
0.70
1.50 0.10
0.02
-0.02
SEATING
PLANE
0.90
5º 2º ꢀ2
3
2
1
A
1.60
0.50
R0.97 0.05
R0.×5 0.05
1
2
PCB Layout Reference View
F
0.70 0.ꢀ0
0.×8 ꢁ×
7
0.25
B
1
ꢀ.37 0.ꢀ0 ꢁ×
0.90 0.ꢀ0 ꢁ×
0.938
R 0.20 ×4
R0.50 0.05 ꢁ×
1.27
0.50 ꢁ×
R 0.10 ×2
7
0.88
For Reference Only, not for tooling use (DWG-0000428)
Dimensions in millimeters
0.48
Dimensions exclusive of mold flash, gate burs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
C
R 0.20 ×4
1.138
0.30
Terminal #1 mark area
A
0.35
Dambar removal protrusion (16×)
B
1.50
Gate burr area
C
Branding scale and appearance at supplier discretion
D
0.10 0.10
Hall elements (E1 and E2); not to scale
E
R 0.10 ×2
Reference land pattern layout;
Detail A
F
Detail B
All pads a minimum of 0.20 mm from all adjacent pads; adjust as
necessary to meet application process requirements and PCB
layout tolerances
Figure 17: Package LR, 7-Pin PSOF Package
53
Allegro MicroSystems
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High-Precision Linear Hall-Effect-Based
Current Sensor IC with 200 µΩ Current Conductor
ACS72981xLR
Revision History
Number
Date
Description
–
1
2
3
4
March 2, 2018
September 24, 2018
April 12, 2019
May 31, 2019
July 17, 2019
Initial release
Updated Features and Benefits (page 1); minor editorial updates
Updated product variants and added characteristic performance data plots (page 2, 6-17, 22-34).
Added -200U3, -200U5, -200B3, and -200B5 product variants (page 2, 18-21, 38-41)
Added Thermal Characteristics table (page 3)
Added Maximum Continuous Current to Absolute Maximum Ratings table (page 3),
ESD ratings table (page 3), and updated thermal data section (pages 51-52)
5
August 28, 2019
Removed Zero Current Output Voltage from Operating Characteristics table (page 5).
Added Zero Current-Output Voltage to Performance Characteristics tables (pages 6-21).
Updated Characteristic Performance Typical Frequency Response plots (page 42).
Updated Zero-Current Output Voltage definition (page 44).
6
November 8, 2019
Added Output Slew Rate characteristic (page 5); corrected ASEK72981 Evaluation Board Layout section
(page 52)
7
8
9
November 21, 2019
December 6, 2019
September 24, 2020
Updated ACS72981LLRATR-050B5 Electrical Offset Error vs. Temperature plot (page 27)
Corrected Selection Guide sensitivity values for -200U3, -200U5, -200B3, and -200B5 product variants
(page 2), and Performance Characteristics sensitivity value for -200U3 (page 18).
Copyright 2020, Allegro MicroSystems.
Allegro MicroSystems reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit
improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of
Allegro’s product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems assumes no responsibility for its use; nor
for any infringement of patents or other rights of third parties which may result from its use.
Copies of this document are considered uncontrolled documents.
For the latest version of this document, visit our website:
www.allegromicro.com
54
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
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