ACS724KMATR-20AB-T [ALLEGRO]
Analog Circuit, 1 Func, BICMOS, PDSO16, SOIC-16;
| 型号： | ACS724KMATR-20AB-T |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Analog Circuit, 1 Func, BICMOS, PDSO16, SOIC-16 信息通信管理 光电二极管 |
| 文件： | 总21页 (文件大小：944K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACS724KMA
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
DESCRIPTION
FEATURES AND BENEFITS
• Differential Hall sensing rejects common-mode fields
• Patented integrated digital temperature compensation
circuitry allows for near closed loop accuracy over
temperature in an open loop sensor
TheAllegro™ACS724KMAcurrentsensorICisaneconomical
andprecisesolutionforACorDCcurrentsensinginindustrial,
commercial, and communication systems. The small package
is ideal for space-constrained applications while also saving
costs due to reduced board area. Typical applications include
motorcontrol,loaddetectionandmanagement,switched-mode
power supplies, and overcurrent fault protection.
• UL60950-1 (ed. 2) certified
□ Dielectric Strength Voltage = 4.8 kVRMS
□ Basic Isolation Working Voltage = 1097 VRMS
□ Reinforced Isolation Working Voltage = 565 VRMS
• Industry-leading noise performance with greatly improved
bandwidth through proprietary amplifier and filter design
techniques
• Filter pin allows user to filter output for improved
resolution at lower bandwidth
• 0.85 mΩ primary conductor resistance for low power loss
and high inrush current withstand capability
• Low-profile SOIC16 package suitable for space-
constrained applications
The device consists of a precise, low-offset, linear Hall
sensor circuit with a copper conduction path located near the
surface of the die.Applied current flowing through this copper
conduction path generates a magnetic field which is sensed
by the integrated Hall IC and converted into a proportional
voltage. The current is sensed differentially in order to reject
common-mode fields, improving accuracy in magnetically
noisyenvironments.Theinherentdeviceaccuracyisoptimized
through the close proximity of the magnetic field to the Hall
transducer. A precise, proportional voltage is provided by the
low-offset,chopper-stabilizedBiCMOSHallIC,whichincludes
Allegro’spatenteddigitaltemperaturecompensation,resulting
inextremelyaccurateperformanceovertemperature.Theoutput
of the device has a positive slope when an increasing current
flows through the primary copper conduction path (from pins
1 through 4, to pins 5 through 8), which is the path used for
current sensing. The internal resistance of this conductive path
is 0.85 mΩ typical, providing low power loss.
• 4.5 to 5.5 V single supply operation
• Output voltage proportional to AC or DC current
Continued on the next page…
TÜV America
Certificate Number:
U8V 14 11 54214 030
CB Certificate Number:
CB 14 11 54214 029
US-22339-A1-UL
The terminals of the conductive path are electrically isolated
from the sensor leads (pins 9 through 16). This allows the
ACS724KMAcurrentsensorICtobeusedinhigh-sidecurrent
sense applications without the use of high-side differential
amplifiers or other costly isolation techniques.
Package: 16-pin SOICW (suffix MA)
Continued on the next page…
Not to scale
16
ACS724KMA NC
1
2
3
The ACS724KMA outputs
IP+
IP+
IP+
IP+
15
an analog signal, VIOUT, that
changes proportionally with
GND
NC
+IP
14
4
the bidirectional AC or DC
primary sensed current, IP,
within the specified measure-
ment range.
13
12
11
10
9
FILTER
IP
VIOUT
NC
CF
5
6
7
CL
1 nF
IP–
IP–
IP–
IP–
The FILTER pin can be used
to decrease the bandwidth in
order to optimize the noise
performance.
–IP
VCC
NC
8
CBYPASS
0.1 µF
Typical Application
ACS724KMA-DS, Rev. 8
MCO-0000217
June 22, 2018
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
FEATURES AND BENEFITS (continued)
DESCRIPTION (continued)
• Factory-trimmed sensitivity and quiescent output voltage for
improved accuracy
• Chopper stabilization results in extremely stable quiescent
output voltage
The ACS724KMA is provided in a low-profile surface-mount
SOIC16 package. The leadframe is plated with 100% matte tin,
whichiscompatiblewithstandardlead(Pb)freeprintedcircuitboard
assembly processes. Internally, the device is Pb-free. The device is
fully calibrated prior to shipment from the factory.
• Nearly zero magnetic hysteresis
• Ratiometric output from supply voltage
SELECTION GUIDE
Sens(Typ) at VCC = 5 V
Part Number
IPR (A)
TA (°C)
Packing [1]
(mV/A)
166
ACS724KMATR-12AB-T
ACS724KMATR-20AB-T
ACS724KMATR-30AB-T
ACS724KMATR-30AU-T
ACS724KMATR-65AB-T
±12
±20
±30
30
100
66
–40 to 125
Tape and Reel, 1000 pieces per reel
132
±65
30.75
[1] Contact Allegro for additional packing options.
2
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
VCC
Notes
Rating
6
Units
V
Supply Voltage
Reverse Supply Voltage
Output Voltage
VRCC
–0.1
V
VIOUT
VRIOUT
TA
VCC + 0.5
–0.1
V
Reverse Output Voltage
Operating Ambient Temperature
Junction Temperature
V
Range K
–40 to 125
165
°C
°C
TJ(max)
Storage Temperature
Tstg
–65 to 165
°C
ISOLATION CHARACTERISTICS
Characteristic
Symbol
Notes
Rating
Unit
Tested ±5 pulses at 2/minute in compliance to IEC 61000-4-5
1.2 µs (rise) / 50 µs (width).
Dielectric Surge Strength Test Voltage
Dielectric Strength Test Voltage
VSURGE
10000
4800
V
Agency type-tested for 60 seconds per UL 60950-1
(edition 2). Production tested at 3000 VRMS for 1 second, in
accordance with UL 60950-1 (edition 2).
VISO
VRMS
1550
1097
800
VPK
VRMS or VDC
VPK
Maximum approved working voltage for basic (single) isolation
according to UL 60950-1 (edition 2).
Working Voltage for Basic Isolation
VWVBI
Maximum approved working voltage for reinforced isolation
according to UL 60950-1 (edition 2).
Working Voltage for Reinforced Isolation
VWVRI
565
7.5
VRMS or VDC
Clearance
Creepage
Dcl
Dcr
Minimum distance through air from IP leads to signal leads.
mm
Minimum distance along package body from IP leads to signal
leads
8.2
mm
THERMAL CHARACTERISTICS
Characteristic
Symbol
Test Conditions*
Value Units
Mounted on the Allegro 85-0738 evaluation board with 700 mm2 of 4 oz.
copper on each side, connected to pins 1 and 2, and to pins 3 and 4, with
thermal vias connecting the layers. Performance values include the power
consumed by the PCB.
Package Thermal Resistance
(Junction to Ambient)
RθJA
23
5
°C/W
°C/W
Package Thermal Resistance
(Junction to Lead)
RθJL
Mounted on the Allegro ASEK724 evaluation board.
*Additional thermal information available on the Allegro website.
3
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
V
CC
VCC
Master Current
Supply
To All Subcircuits
POR
Programming
Control
Hall
Current
Drive
C
0.1 µF
BYPASS
EEPROM and
Control Logic
Temperature
Sensor
Offset
Control
IP+
IP+
IP+
IP+
Sensitivity
Control
+
–
+
VIOUT
R
F(int)
–
IP–
IP–
IP–
IP–
GND
FILTER
C
F
Functional Block Diagram
16 NC
IP+
IP+
IP+
IP+
IP-
1
2
3
4
5
6
7
8
Terminal List Table
15 GND
14 NC
Number
1, 2, 3, 4
5, 6, 7, 8
Name
Description
IP+
IP-
Terminals for current being sensed; fused internally
Terminals for current being sensed; fused internally
13 FILTER
12 VIOUT
11 NC
No internal connection; recommended to be left unconnected in order to
maintain high creepage
IP-
9, 16
10
NC
VCC
NC
IP-
10 VCC
Device power supply terminal
IP-
9 NC
No internal connection; recommened to connect to GND for the best ESD
performance
11, 14
12
13
15
VIOUT
FILTER
GND
Analog output signal
Pinout Diagram
Terminal for external capacitor that sets bandwidth
Signal ground terminal
4
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
COMMON ELECTRICAL CHARACTERISTICS [1]: Valid through the full range of TA = –40°C to 125°C and VCC= 5 V,
unless otherwise specified
Characteristic
Symbol
VCC
Test Conditions
Min.
4.5
–
Typ.
5
Max.
5.5
14
10
–
Units
V
Supply Voltage
Supply Current
ICC
VCC within VCC(min) and VCC(max)
VIOUT to GND
10
–
mA
nF
Output Capacitance Load
Output Resistive Load
Primary Conductor Resistance
Internal Filter Resistance [2]
Common Mode Field Rejection Ratio
Primary Hall Coupling Factor
Secondary Hall Coupling Factor
Hall Plate Sensitivity Matching
Hysteresis
CL
–
RL
VIOUT to GND
4.7
–
–
kΩ
mΩ
kΩ
dB
RIP
TA = 25°C
0.85
1.7
40
4.5
0.5
±1
150
3
–
RF(INT)
CMFRR
G1
–
–
Uniform external magnetic field
TA = 25°C
–
–
–
–
G/A
G/A
%
G2
TA = 25°C
–
–
SensMATCH
IHYS
TA = 25°C
–
–
Difference in offset after a ±40 A pulse
IP = IP(max), TA = 25°C, CL = 1 nF
IP = IP(max), TA = 25°C, CL = 1 nF
IP = IP(max), TA = 25°C, CL = 1 nF
Small signal –3 dB, CL = 1 nF
–
–
mA
μs
Rise Time
tr
–
–
Propagation Delay
tpd
–
2
–
μs
Response Time
tRESPONSE
BW
–
4
–
μs
Internal Bandwidth
–
120
–
kHz
Input-referenced noise density;
TA = 25°C, CL = 1 nF
µARMS/
√Hz
Noise Density
IND
–
450
–
–
Input-referenced noise; CF = 4.7 nF,
CL = 1 nF, BW = 18 kHz, TA = 25°C
Noise
IN
–
–
–
60
±1
mARMS
Nonlinearity
ELIN
Through full range of IP
%
–
SENS_RAT_
COEF
Sensitivity Ratiometry Coefficient
V
CC = 4.5 to 5.5 V, TA = 25°C
CC = 4.5 to 5.5 V, TA = 25°C
1.3
–
–
QVO_RAT_
COEF
Zero-Current Output Ratiometry Coefficient
Saturation Voltage [3]
V
–
1
–
VOH
VOL
RL = 4.7 kΩ, TA = 25°C
RL = 4.7 kΩ, TA = 25°C
VCC – 0.5
–
–
–
–
V
V
0.5
Output reaches 90% of steady-state
level, TA = 25°C, IP = IPR(max) applied
Power-On Time
tPO
–
80
–
μs
Shorted Output to Ground Current
Shorted Output to VCC Current
ISC(GND)
ISC(VCC)
TA = 25°C
TA = 25°C
–
–
3.3
45
–
–
mA
mA
[1] Device may be operated at higher primary current levels, IP, ambient temperatures, TA, and internal leadframe temperatures, provided the Maximum Junction Tempera-
ture, TJ(max), is not exceeded.
[2]
R
forms an RC circuit via the FILTER pin.
F(INT)
[3] The sensor IC will continue to respond to current beyond the range of IP until the high or low saturation voltage; however, the nonlinearity in this region will be worse than
through the rest of the measurement range.
5
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
xKMATR-12AB PERFORMANCE CHARACTERISTICS: TA Range K, valid at TA = 40°C to 125°C, VCC = 5 V, unless oth-
erwise specified
Characteristic
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Units
IPR
–12
–
–
12
–
A
Sens
IPR(min) < IP < IPR(max)
166
mV/A
VCC
0.5
×
Zero Current Output Voltage
VIOUT(Q)
Bidirectional; IP = 0 A
–
–
V
ACCURACY PERFORMANCE
IP = IPR(max), TA = 25°C to 125°C
IP = IPR(max), TA = –40°C to 25°C
–2.5
–
±1
±3
2.5
–
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3]: ETOT = ESENS + 100 × VOE/(Sens × IP)
TA = 25°C to 125°C, measured at IP = IPR(max)
–2
–
±1
2
–
%
%
Sensitivity Error
Offset Voltage
ESENS
TA = –40°C to 25°C, measured at IP = IPR(max)
IP = 0 A, TA = 25°C to 125°C
±2.8
±5
–15
–
15
–
mV
mV
VOE
IP = 0 A, TA = –40°C to 25°C
±20
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–
–
±1
±1
–
–
%
%
[1] Typical values with +/- are 3 sigma values.
[2] Percentage of IP, with IP = IPR(max).
[3] A single part will not have both the maximum/minimum sensitivity error and maximum/minimum offset voltage, as that would violate the maximum/minimum total output
error specification. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
6
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
xKMATR-20AB PERFORMANCE CHARACTERISTICS: TA Range K, valid at TA = 40°C to 125°C, VCC = 5 V, unless oth-
erwise specified
Characteristic
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Units
IPR
–20
–
–
20
–
A
Sens
IPR(min) < IP < IPR(max)
100
mV/A
VCC
0.5
×
Zero Current Output Voltage
VIOUT(Q)
Bidirectional; IP = 0 A
–
–
V
ACCURACY PERFORMANCE
IP = IPR(max), TA = 25°C to 125°C
IP = IPR(max), TA = –40°C to 25°C
–2.5
–
±1
±3
2.5
–
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3]: ETOT = ESENS + 100 × VOE/(Sens × IP)
TA = 25°C to 125°C, measured at IP = IPR(max)
–2
–
±1
2
–
%
%
Sensitivity Error
Offset Voltage
ESENS
TA = –40°C to 25°C, measured at IP = IPR(max)
IP = 0 A, TA = 25°C to 125°C
±2.8
±5
–15
–
15
–
mV
mV
VOE
IP = 0 A, TA = –40°C to 25°C
±20
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–
–
±1
±1
–
–
%
%
[1] Typical values with +/- are 3 sigma values.
[2] Percentage of IP, with IP = IPR(max).
[3] A single part will not have both the maximum/minimum sensitivity error and maximum/minimum offset voltage, as that would violate the maximum/minimum total output
error specification. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
7
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
xKMATR-30AB PERFORMANCE CHARACTERISTICS: TA Range K, valid at TA = 40°C to 125°C, VCC = 5 V, unless oth-
erwise specified
Characteristic
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Units
IPR
–30
–
–
30
–
A
Sens
IPR(min) < IP < IPR(max)
66
mV/A
VCC
0.5
×
Zero Current Output Voltage
VIOUT(Q)
Bidirectional; IP = 0 A
–
–
V
ACCURACY PERFORMANCE
IP = IPR(max), TA = 25°C to 125°C
IP = IPR(max), TA = –40°C to 25°C
–2.5
–
±0.8
±2.7
2.5
–
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3]: ETOT = ESENS + 100 × VOE/(Sens × IP)
TA = 25°C to 125°C, measured at IP = IPR(max)
–2
–
±0.7
±2.6
±7
2
–
%
%
Sensitivity Error
Offset Voltage
ESENS
TA = –40°C to 25°C, measured at IP = IPR(max)
IP = 0 A, TA = 25°C to 125°C
–15
–
15
–
mV
mV
VOE
IP = 0 A, TA = –40°C to 25°C
±15
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–
–
±1
±1
–
–
%
%
[1] Typical values with +/- are 3 sigma values.
[2] Percentage of IP, with IP = IPR(max).
[3] A single part will not have both the maximum/minimum sensitivity error and maximum/minimum offset voltage, as that would violate the maximum/minimum total output
error specification. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
8
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
xKMATR-30AU PERFORMANCE CHARACTERISTICS: TA Range K, valid at TA = 40°C to 125°C, VCC = 5 V, unless oth-
erwise specified
Characteristic
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Units
IPR
0
–
–
30
–
A
Sens
IPR(min) < IP < IPR(max)
132
mV/A
VCC
0.1
×
Zero Current Output Voltage
VIOUT(Q)
Unidirectional; IP = 0 A
–
–
V
ACCURACY PERFORMANCE
IP = IPR(max), TA = 25°C to 125°C
IP = IPR(max), TA = –40°C to 25°C
–2.5
–
±0.7
±2.5
2.5
–
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3]: ETOT = ESENS + 100 × VOE/(Sens × IP)
TA = 25°C to 125°C, measured at IP = IPR(max)
–2
–
±0.7
±2.5
±7
2
–
%
%
Sensitivity Error
Offset Voltage
ESENS
TA = –40°C to 25°C, measured at IP = IPR(max)
IP = 0 A, TA = 25°C to 125°C
–15
–
15
–
mV
mV
VOE
IP = 0 A, TA = –40°C to 25°C
±20
Lifetime Drift Characteristics
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–
–
±1
±1
–
–
%
%
[1] Typical values with +/- are 3 sigma values.
[2] Percentage of IP, with IP = IPR(max).
[3] A single part will not have both the maximum/minimum sensitivity error and maximum/minimum offset voltage, as that would violate the maximum/minimum total output
error specification. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
9
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
xKMATR-65AB PERFORMANCE CHARACTERISTICS: TA Range K, valid at TA = 40°C to 125°C, VCC = 5 V, unless oth-
erwise specified
Characteristic
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Units
IPR
–65
–
–
65
–
A
Sens
IPR(min) < IP < IPR(max)
30.75
mV/A
VCC
0.5
×
Zero Current Output Voltage
VIOUT(Q)
Bidirectional; IP = 0 A
–
–
V
ACCURACY PERFORMANCE
IP = IPR(max), TA = 25°C to 125°C
IP = IPR(max), TA = –40°C to 25°C
–2.5
–
±1
±3
2.5
–
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3]: ETOT = ESENS + 100 × VOE/(Sens × IP)
TA = 25°C to 125°C, measured at IP = IPR(max)
–2
–
±1
2
–
%
%
Sensitivity Error
Offset Voltage
ESENS
TA = –40°C to 25°C, measured at IP = IPR(max)
IP = 0 A, TA = 25°C to 125°C
±2.8
±5
–15
–
15
–
mV
mV
VOE
IP = 0 A, TA = –40°C to 25°C
±20
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–
–
±1
±1
–
–
%
%
[1] Typical values with +/- are 3 sigma values.
[2] Percentage of IP, with IP = IPR(max).
[3] A single part will not have both the maximum/minimum sensitivity error and maximum/minimum offset voltage, as that would violate the maximum/minimum total output
error specification. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
10
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
CHARACTERISTIC PERFORMANCE
xKMATR-12AB
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
2540
2530
2520
2510
2500
2490
2480
2470
2460
40.0
30.0
20.0
10.0
0.0
-10.0
-20.0
-30.0
-40.0
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity vs. Temperature
Sensitivity Error vs. Temperature
174
172
170
168
166
164
162
160
158
5.0
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
2.0
1.5
5.0
4.0
3.0
1.0
2.0
0.5
1.0
0.0
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
-0.5
-1.0
-1.5
-2.0
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
+3 Sigma
Average
-3 Sigma
11
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
CHARACTERISTIC PERFORMANCE
xKMATR-20AB
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
2520
2515
2510
2505
2500
2495
2490
2485
2480
2475
2470
20
15
10
5
0
-5
-10
-15
-20
-25
-30
-50
0
50
100
150
150
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensiꢀvity vs. Temperature
Sensiꢀvity Error vs. Temperature
103
102
101
100
99
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
98
97
96
-50
0
50
100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Total Error at IPR(max) vs. Temperature
Nonlinearity vs. Temperature
3.0
2.0
2.0
1.5
1.0
1.0
0.5
0.0
0.0
-1.0
-2.0
-3.0
-4.0
-0.5
-1.0
-1.5
-2.0
-50
0
50
100
150
-50
0
50
100
Temperature (°C)
Temperature (°C)
+3 Sigma
Average
-3 Sigma
12
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
CHARACTERISTIC PERFORMANCE
xKMATR-30AB
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
2515
2510
2505
2500
2495
2490
2485
2480
15
10
5
0
-5
-10
-15
-20
-50
0
50
100
150
150
150
-50
-50
-50
0
50
100
150
150
150
Temperature (°C)
Temperature (°C)
Sensiꢀvity vs. Temperature
Sensiꢀvity Error vs. Temperature
68
67
67
66
66
65
65
64
64
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
-50
0
50
100
0
50
100
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
2.0
1.5
2.0
1.0
1.0
0.0
0.5
0.0
-1.0
-2.0
-3.0
-4.0
-0.5
-1.0
-1.5
-2.0
-50
0
50
100
0
50
100
Temperature (°C)
Temperature (°C)
+3 Sigma
Average
-3 Sigma
13
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
CHARACTERISTIC PERFORMANCE
xKMATR-30AU
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
525
520
515
510
505
500
495
490
485
480
475
25
20
15
10
5
0
-5
-10
-15
-20
-25
-50
-50
-50
0
50
100
150
150
150
-50
-50
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensiꢀvity vs. Temperature
Sensiꢀvity Error vs. Temperature
137
136
135
134
133
132
131
130
129
128
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
0
50
100
0
50
100
150
Temperature (°C)
Temperature (°C)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
2.0
1.5
3.0
2.0
1.0
1.0
0.5
0.0
0.0
-1.0
-2.0
-3.0
-4.0
-0.5
-1.0
-1.5
-2.0
0
50
100
0
50
100
150
Temperature (°C)
Temperature (°C)
+3 Sigma
Average
-3 Sigma
14
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
CHARACTERISTIC PERFORMANCE
ACS724 TYPICAL FREQUENCY RESPONSE
ACS724 Frequency Response
5
0
-5
-10
101
102
103
104
105
Frequency [Hz]
50
0
-50
-100
-150
101
102
103
104
105
Frequency [Hz]
15
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
DEFINITIONS OF ACCURACY CHARACTERISTICS
sensitivity error, and at relatively low currents, ETOT will be mostly
due to Offset Voltage (VOE). In fact, at IP = 0, ETOT approaches
infinity due to the offset. 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.
Sensitivity (Sens)
The change in sensor IC output in response to a 1A change
through the primary conductor. The sensitivity is the product
of the magnetic coupling factor (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.
Accuracy Across
Temperature
Increasing
V
(V)
IOUT
Nonlinearity (ELIN
)
Accuracy at
25°C Only
The nonlinearity is a measure of how linear the output of the sen-
sor IC is over the full current measurement range. The nonlinear-
ity is calculated as:
Ideal V
IOUT
Accuracy Across
Temperature
Accuracy at
25°C Only
V
IOUT (IPR(max)) – VIOUT(Q)
× 100 (%)
1–
ELIN
=
[ {
2 × VIOUT (IPR(max)/2) – VIOUT(Q)
I
(min)
PR
+I (A)
P
V
IOUT(Q)
where VIOUT(IPR(max)) is the output of the sensor IC with the
maximum measurement current flowing through it and
VIOUT(IPR(max)/2) is the output of the sensor IC with half of the
maximum measurement current flowing through it.
–I (A)
P
Full Scale I
P
I (max)
PR
Zero Current Output Voltage (V
)
0 A
IOUT(Q)
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.
Accuracy at
25°C Only
Decreasing
(V)
V
Accuracy Across
Temperature
IOUT
For example, in the case of a bidirectional output device, VCC
=
Figure 1: Output Voltage versus Sensed Current
5.0 V translates into VIOUT(Q) = 2.50 V. Variation in VIOUT(Q) can
be attributed to the resolution of the Allegro linear IC quiescent
voltage trim and thermal drift.
+E
TOT
Offset Voltage (VOE)
The deviation of the device output from its ideal quiescent value
of 0.5 × VCC (bidirectional) or 0.1 × VCC (unidirectional) due to
nonmagnetic causes. To convert this voltage to amperes, divide
by the device sensitivity, Sens.
Across Temperature
25°C Only
Total Output Error (ETOT
)
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:
–I
P
+I
P
V
IOUT_ideal(IP) – VIOUT(IP)
ETOT(IP) =
× 100 (%)
–E
TOT
Sensideal(IP)
× IP
The Total Output Error incorporates all sources of error and is a
function of IP. At relatively high currents, ETOT will be mostly due to
Figure 2: Total Output Error versus Sensed Current
16
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
APPLICATION INFORMATION
Here, ESENS and VOE are the ±3 sigma values for those error
terms. If there is an average sensitivity error or average offset
voltage, then the average Total Error is estimated as:
Estimating Total Error versus Sensed Current
The Performance Characteristics tables give distribution
(±3 sigma) values for Total Error at IPR(max); however, one often
wants to know what error to expect at a particular current. This
can be estimated by using the distribution data for the compo-
nents of Total Error, Sensitivity Error, and Offset Voltage. The
±3 sigma value for Total Error (ETOT) as a function of the sensed
current (IP) is estimated as:
100 × VOE
AVG
ETOT (IP) = ESENS
+
AVG
AVG
Sens × IP
The resulting total error will be a sum of ETOT and ETOT_AVG
.
Using these equations and the 3 sigma distributions for Sensitiv-
ity Error and Offset Voltage, the Total Error versus sensed current
(IP) is shown here for the ACS724KMATR-20AB. As expected,
as one goes towards zero current, the error in percent goes
towards infinity due to division by zero (refer to Figure 3).
2
100 × VOE
(Sens × I )
2
ETOT(IP) = ESENS
+
P
20
15
10
5
–40ºC +3σ
–40ºC –3σ
25ºC +3σ
25ºC –3σ
85ºC +3σ
85ºC –3σ
0
–5
–10
–15
–20
0
5
10
15
20
25
Current (A)
Figure 3: Predicted Total Error as a Function of Sensed
Current for the ACS724KMATR-20AB
17
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
DEFINITIONS OF DYNAMIC RESPONSE CHARACTERISTICS
Power-On Time (tPO)
V
V
CC
V
(typ)
CC
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.
V
IOUT
90% V
IOUT
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 (refer to Figure 4).
V
CC
(min)
t
PO
t
t
1
2
t = time at which power supply reaches
1
minimum specified operating voltage
t = time at which output voltage settles
2
within ±10% of its steady state value
under an applied magnetic field
Rise Time (tr)
The time interval between: a) when the sensor IC reaches 10%
of its full-scale value; and b) when it reaches 90% of its full-
scale value (refer to Figure 5). The rise time to a step response is
used to derive the bandwidth of the current sensor IC, in which
ƒ(–3 dB) = 0.35/tr . Both tr and tRESPONSE are detrimentally
affected by eddy current losses observed in the conductive IC
ground plane.
0
t
Figure 4: Power-On Time
Primary Current
(%)
90
V
IOUT
Propagation Delay (tpd)
Rise Time, t
r
20
10
0
The propagation delay is measured as the time interval between:
a) when the primary current signal reaches 20% of its final value,
and b) when the device reaches 20% of its output corresponding
to the applied current (refer to Figure 5).
t
Propagation Delay, t
pd
Figure 5: Rise Time and Propagation Delay
Response Time (tRESPONSE
)
The time interval between: a) when the primary current signal
reaches 90% of its final value, and b) when the device reaches
90% of its output corresponding to the applied current (refer to
Figure 6).
Primary Current
(%)
90
V
IOUT
Response Time, t
RESPONSE
0
t
Figure 6: Response Time
18
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
NOT TO SCALE
All dimensions in millimeters.
15.75
9.54
1.27
0.65
Package Outline
Slot in PCB to maintain >8 mm creepage
once part is on PCB
2.25
7.25
1.27
3.56
17.27
Current
In
Current
Out
Perimeter holes for stitching to the other,
matching current trace design, layers of
the PCB for enhanced thermal capability.
21.51
Figure 7: High-Isolation PCB Layout
19
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
PACKAGE OUTLINE DRAWING
For Reference Only – Not for Tooling Use
(Reference MS-013AA)
NOT TO SCALE
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
8°
10.30 0.20
0°
16
0.33
0.20
7.50 0.10
10.30 0.33
A
1.27
0.40
1.40 REF
1
2
Branded Face
0.25 BSC
SEATING PLANE
16X
CC
GAUGE PLANE
2.65 MAX
0.10
C
SEATING
PLANE
0.30
0.10
1.27 BSC
0.51
0.31
1.27
0.65
16
NNNNNNN
LLLLLLLL
2.25
1
B
Standard Branding Reference View
L
9.50
N = Device part number
= Assembly Lot Number, first eight characters
A
Terminal #1 mark area
B
C
Branding scale and appearance at supplier discretion
1
2
Reference land pattern layout (reference IPC7351 SOIC127P600X175-8M);
all pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary
to meet application process requirements and PCB layout tolerances
C
PCB Layout Reference View
Figure 8: Package MA, 16-Pin SOICW
20
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
High-Accuracy, Hall-Effect-Based Current Sensor IC with
Common-Mode Field Rejection in High-Isolation SOIC16 Package
ACS724KMA
Revision History
Number
Date
December 11, 2015 Initial release
Description
–
1
2
3
4
January 8, 2016
March 18, 2016
April 13, 2016
June 15, 2017
Added ACS724KMATR-65AB-T variant
Added ACS724KMATR-30AB-T variant, UL/TUV certification; removed solder balls reference in Description
Corrected Package Outline Drawing branding information (page 17).
Added ACS724KMATR-12AB-T variant; corrected packing information
Added Sensitivity Ratiometry Coefficient and Zero-Current Output Ratiometry Coefficient to Electrical
Characteristics table (page 5).
5
November 27, 2017
6
7
8
January 12, 2018
January 22, 2018
June 22, 2018
Added Dielectric Surge Strength Test Voltage to Isolation Characteristics table (page 3).
Added Common Mode Field Rejection Ratio characteristic (page 5).
Added Typical Frequency Response plots (page 15).
Copyright ©2018, Allegro MicroSystems, LLC
Allegro MicroSystems, LLC 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, LLC 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
21
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
相关型号：
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
©2020 ICPDF网 联系我们和版权申明