ACS724LLCTR-30AB-T [ALLEGRO]
Analog Circuit, 1 Func, PDSO8, SOIC-8;
| 型号： | ACS724LLCTR-30AB-T |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Analog Circuit, 1 Func, PDSO8, SOIC-8 光电二极管 |
| 文件： | 总27页 (文件大小：759K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
FEATURES AND BENEFITS
• AEC-Q100 qualified
DESCRIPTION
TheAllegro™ ACS724 current sensor IC is an economical and
precise solution for AC or DC current sensing in industrial,
automotive, commercial, and communications systems. The
small package is ideal for space-constrained applications
while also saving costs due to reduced board area. Typical
applications include motor control, load detection and
management, switched-mode power supplies, and overcurrent
fault protection.
• Differential Hall sensing rejects common-mode fields
• 1.2 mΩ primary conductor resistance for low power loss
and high inrush current withstand capability
• Integrated shield virtually eliminates capacitive
coupling from current conductor to die, greatly
suppressing output noise due to high dv/dt transients
• Industry-leading noise performance with greatly
improved bandwidth through proprietary amplifier and
filter design techniques
• High-bandwidth 120 kHz analog output for faster
response times in control applications
• Filter pin allows user to filter the output for improved
resolution at lower bandwidth
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-stabilized BiCMOS Hall IC, which is
programmed for accuracy after packaging. The output of the
device has a positive slope when an increasing current flows
through the primary copper conduction path (from pins 1 and
2, to pins 3 and 4), which is the path used for current sensing.
Theinternalresistanceofthisconductivepathis1.2mΩtypical,
providing low power loss.
• Patented integrated digital temperature compensation
circuitry allows for near closed loop accuracy over
temperature in an open loop sensor
• Small-footprint, low-profile SOIC8 package suitable for
space-constrained applications
• Filter pin simplifies bandwidth limiting for better
resolution at lower frequencies
Continued on the next page…
Package: 8-Pin SOIC (suffix LC)
TÜV America
Certificate Number:
U8V 14 11 54214 032
The terminals of the conductive path are electrically isolated
from the sensor leads (pins 5 through 8). This allows the
ACS724currentsensorICtobeusedinhigh-sidecurrentsense
applicationswithouttheuseofhigh-sidedifferentialamplifiers
or other costly isolation techniques.
CB 14 11 54214 031
CB Certificate Number:
US-22334-A2-UL
Not to scale
Continued on the next page…
1
8
VCC
IP+
IP+
+IP
The ACS724 outputs an
analog signal, VIOUT , that
changes proportionally
with the bidirectional AC
ACS724
7
6
2
VIOUT
IP
or DC primary sensed
current, IP, within the
specified measurement
CBYPASS
0.1 µF
3
4
FILTER
GND
IP–
IP–
range. The FILTER pin
–IP
CLOAD
can be used to decrease
the bandwidth in order
to optimize the noise
performance.
CF
1 nF
5
Typical Application
ACS724-DS, Rev. 8
MCO-0000227
January 23, 2018
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
FEATURES AND BENEFITS (continued)
DESCRIPTION (continued)
• 5 V, single supply operation
The ACS724 is provided in a small, low-profile surface-mount
SOIC8 package. The leadframe is plated with 100% matte tin,
which is compatible with standard lead (Pb) free printed circuit
board assembly processes. Internally, the device is Pb-free, except
for flip-chip high-temperature Pb-based solder balls, currently
exempt from RoHS. The device is fully calibrated prior to shipment
from the factory.
• Output voltage proportional to AC or DC current
• Factory-trimmed sensitivity and quiescent output voltage for
improved accuracy
• Chopper stabilization results in extremely stable quiescent
output voltage
• Nearly zero magnetic hysteresis
• Ratiometric output from supply voltage
SELECTION GUIDE
Sens(Typ)
IPR
(A)
TA
(°C)
Part Number
at VCC = 5 V
(mV/A)
Packing*
ACS724LLCTR-05AB-T
ACS724LLCTR-10AU-T
ACS724LLCTR-10AB-T
ACS724LLCTR-20AU-T
ACS724LLCTR-20AB-T
ACS724LLCTR-30AU-T
ACS724LLCTR-30AB-T
ACS724LLCTR-50AB-T
±5
10
400
400
±10
20
200
–40 to 150
Tape and Reel, 3000 pieces per reel
±20
30
100
133
66
±30
±50
40
*Contact Allegro for additional packing options.
Allegro MicroSystems, LLC
115 Northeast Cutoff
2
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
SPECIFICATIONS
ABSOLUTE ꢁAꢂIꢁUꢁ 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 L
–40 to 150
165
°C
°C
TJ(max)
Storage Temperature
Tstg
–65 to 165
°C
ISOLATION CꢀARACTERISTICS
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
6000
V
Agency type-tested for 60 seconds per UL standard 60950-
1 (edition 2); production-tested at VISO for 1 second, in
accordance with UL 60950-1 (edition 2).
VISO
2400
VRMS
420
297
4.2
Vpk or VDC
Vrms
Maximum approved working voltage for basic (single)
isolation according to UL 60950-1 (edition 2)
Working Voltage for Basic Isolation
VWVBI
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.
4.2
mm
TꢀERꢁAL CꢀARACTERISTICS
Characteristic
Symbol
Test Conditions*
Value
Units
Mounted on the Allegro 85-0740 evaluation board with
800 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
°C/W
Package Thermal Resistance
(Junction to Lead)
RθJL
Mounted on the Allegro ASEK724 evaluation board.
5
°C/W
*Additional thermal information available on the Allegro website.
Allegro MicroSystems, LLC
115 Northeast Cutoff
3
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
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+
Sensitivity
Control
+
–
+
VIOUT
R
F(int)
–
IP–
IP–
GND
FILTER
C
F
Functional Block Diagram
PINOUT DIAGRAꢁ AND TERꢁINAL LIST TABLE
Terminal List Table
IP+
IP+
IP–
IP–
1
2
3
4
8
7
6
5
VCC
Number
Name
IP+
Description
Terminals for current being sensed; fused internally
Terminals for current being sensed; fused internally
Signal ground terminal
VIOUT
FILTER
GND
1, 2
3, 4
5
IP–
GND
FILTER
VIOUT
VCC
6
Terminal for external capacitor that sets bandwidth
Analog output signal
Package LC, 8-Pin SOICN
Pinout Diagram
7
8
Device power supply terminal
Allegro MicroSystems, LLC
115 Northeast Cutoff
4
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
COꢁꢁON ELECTRICAL CꢀARACTERISTICS [1]: Valid through the full range of TA , VCC= 5 V, CF = 0,
unless otherwise specified
Characteristic
Symbol
VCC
Test Conditions
ꢁin.
4.5
–
Typ.
–
ꢁax.
5.5
14
10
–
Unit
V
Supply Voltage
Supply Current
ICC
VCC = 5 V, output open
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
Rise Time
CL
VIOUT to GND
VIOUT to GND
TA = 25°C
–
RL
4.7
–
–
kΩ
mΩ
kΩ
dB
G/A
G/A
%
RIP
1.2
1.8
40
11
2.8
±1
3
–
RF(int)
CMFRR
G1
–
–
Uniform external magnetic field
TA = 25°C
–
–
–
–
G2
TA = 25°C
–
–
Sensmatch
tr
TA = 25°C
–
–
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
–
–
μs
Propagation Delay
tpd
–
2
–
μs
Response Time
tRESPONSE
BW
–
4
–
μs
Bandwidth
–
120
–
kHz
Input-referenced noise density;
TA = 25°C, CL = 1 nF
µA(rms)/
√Hz
Noise Density
IND
–
150
–
Input-referenced noise: CF = 4.7 nF,
CL = 1 nF, BW = 18 kHz, TA = 25°C
Noise
IN
–
–1.5
–
20
–
–
+1.5
–
mA(rms)
Nonlinearity
ELIN
Through full range of IP
%
–
SENS_RAT_
COEF
Sensitivity Ratiometry Coefficient
V
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]
–
1
–
–
VOH
VOL
RL = 4.7 kΩ
RL = 4.7 kΩ
–
–
VCC – 0.3
0.3
–
–
V
V
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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
5
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-05AB PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ.[1]
ꢁax.
Unit
IPR
–5
–
–
5
–
A
Sens
IPR(min) < IP < IPR(max)
400
mV/A
VCC
0.5
×
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
–
–
V
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2.5
–6
±1.5
±4.5
2.5
6
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COꢁPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–2
±1
±4.5
±7
2
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
–5.5
–15
–30
5.5
15
30
mV
mV
VOE
±13
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
6
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-10AU PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current-Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ.[1]
ꢁax.
Unit
IPR
0
–
–
10
–
A
Sens
IPR(min) < IP < IPR(max)
400
mV/A
VCC
0.1
×
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
–
–
V
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2.5
–6
±1.5
±4.5
2.5
6
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COꢁPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–2
±1
±4.5
±7
2
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
–5.5
–15
–30
5.5
15
30
mV
mV
VOE
±13
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
7
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-10AB PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current-Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ.1
ꢁax.
Unit
IPR
–10
–
–
10
–
A
Sens
IPR(min) < IP < IPR(max)
200
mV/A
VCC
0.5
×
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
–
–
V
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2
–6
±1
2
6
%
%
Total Output Error2
ETOT
±4.5
TOTAL OUTPUT ERROR COꢁPONENTS3 ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–1.5
–5.5
–10
–30
±1
±4.5
±6
1.5
5.5
10
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
mV
mV
VOE
±8
30
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
8
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-20AU PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current-Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ. [1]
ꢁax.
Unit
IPR
0
–
–
20
–
A
Sens
IPR(min) < IP < IPR(max)
200
mV/A
VCC
0.1
×
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
–
–
V
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2
–6
±0.7
±4
2
6
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COꢁPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–1.5
–5.5
–10
–30
±0.7
±4
1.5
5.5
10
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
±6
mV
mV
VOE
±8
30
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
9
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-20AB PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current-Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ. [1]
ꢁax.
Unit
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
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2
–6
±0.8
±4
2
6
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COꢁPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–1.5
–5.5
–10
–30
±0.6
±4
1.5
5.5
10
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
±5
mV
mV
VOE
±6
30
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
10
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-30AU PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current-Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ. [1]
ꢁax.
Unit
IPR
0
–
–
30
–
A
Sens
IPR(min) < IP < IPR(max)
133
mV/A
VCC
0.1
×
Zero-Current Output Voltage
VIOUT(Q)
Unidirectional, IP = 0 A
–
–
V
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2
–6
±0.7
±4
2
6
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COꢁPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–1.5
–5.5
–10
–30
±0.7
±4
1.5
5.5
10
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
±6
mV
mV
VOE
±7
30
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
11
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-30AB PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current-Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ. [1]
ꢁax.
Unit
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
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2
–6
±0.8
±4
2
6
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COꢁPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–1.5
–5.5
–10
–30
±0.8
±4
1.5
5.5
10
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
±6
mV
mV
VOE
±6
30
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
12
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-50AB PERFORꢁANCE CꢀARACTERISTICS: TA Range L, valid at TA = 40°C to 150°C, VCC = 5 V, CF = 0,
unless otherwise specified
Characteristic
NOꢁINAL PERFORꢁANCE
Current-Sensing Range
Sensitivity
Symbol
Test Conditions
ꢁin.
Typ. [1]
ꢁax.
Unit
IPR
–50
–
–
50
–
A
Sens
IPR(min) < IP < IPR(max)
40
mV/A
VCC
0.5
×
Zero-Current Output Voltage
VIOUT(Q)
Bidirectional, IP = 0 A
–
–
V
ACCURACꢃ PERFORꢁANCE
IP = IPR(max), TA = 25°C to 150°C
IP = IPR(max), TA = –40°C to 25°C
–2
–6
±0.8
±4
2
6
%
%
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COꢁPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
IP = IPR(max), TA = 25°C to 150°C
–1.5
–5.5
–10
–30
±0.8
±4
1.5
5.5
10
%
%
Sensitivity Error
Offset Voltage
Esens
IP = IPR(max), TA = –40°C to 25°C
IP = 0 A, TA = 25°C to 150°C
IP = 0 A, TA = –40°C to 25°C
±6
mV
mV
VOE
±6
30
LIFETIꢁE DRIFT CꢀARACTERISTICS
Sensitivity Error Lifetime Drift
Total Output Error Lifetime Drift
Esens_drift
Etot_drift
–3
–3
±1
±1
3
3
%
%
[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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
13
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
CꢀARACTERISTIC PERFORꢁANCE
xLLCTR-05AB
Offset Voltage vs. Temperature
Zero Current Output Voltage vs. Temperature
15.00
10.00
5.00
2515
2510
2505
2500
2495
2490
2485
0.00
-5.00
-10.00
-15.00
-50
0
50
100
150
150
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
8.00
6.00
4.00
2.00
0.00
-2.00
-4.00
-6.00
-8.00
425
420
415
410
405
400
395
390
385
380
375
-50
0
50
100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Total Error at IPR(max) vs. Temperature
Nonlinearity vs. Temperature
8.00
6.00
4.00
2.00
0.00
-2.00
-4.00
-6.00
-8.00
1.00
0.75
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
-50
0
50
100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
14
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
CꢀARACTERISTIC PERFORꢁANCE
xLLCTR-10AU
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
515
510
505
500
495
490
15
10
5
0
-5
-10
-15
485
-50
0
50
100
150
150
150
-50
-50
-50
0
50
100
150
150
150
Temperature (ºC)
Temperature (ºC)
Sensitivity vs. Temperature
Sensitivity Error vs. Temperature
415
410
405
400
395
390
385
380
375
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-50
0
50
100
0
50
100
Temperature (ºC)
Temperature (ºC)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
1.00
0.80
0.60
0.40
0.20
4
3
2
1
0
0.00
-1
-2
-3
-4
-5
-6
-0.20
-0.40
-0.60
-0.80
-1.00
-50
0
50
100
0
50
100
Temperature (ºC)
Temperature (ºC)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
15
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-10AB
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
2510
2508
2506
2504
2502
2500
2498
2496
2494
10
8
6
4
2
0
-2
-4
-6
-8
2492
-50
0
50
100
150
-50
-50
-50
0
50
100
150
150
150
Temperature (ºC)
Temperature (ºC)
Sensitivity vs. Temperature
Sensitivity Error vs. Temperature
210
208
206
204
202
200
198
196
193
192
190
188
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-50
0
50
100
150
0
50
100
Temperature (ºC)
Temperature (ºC)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
5
4
3
1.00
0.80
0.60
0.40
0.20
2
1
0
0.00
-1
-2
-3
-4
-5
-6
-0.20
-0.40
-0.60
-0.80
-1.00
-50
0
50
100
150
0
50
100
Temperature (ºC)
Temperature (ºC)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
16
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-20AU
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
8
6
508
506
504
502
500
498
496
494
492
4
2
0
-2
-4
-6
-8
-10
490
-50
0
50
100
150
150
150
-50
-50
-50
0
50
100
150
150
150
Temperature (ºC)
Temperature (ºC)
Sensitivity vs. Temperature
Sensitivity Error vs. Temperature
4
3
208
206
204
202
200
198
196
194
192
190
2
1
0
-1
-2
-3
-4
-5
-50
0
50
100
0
50
100
Temperature (ºC)
Temperature (ºC)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
1.00
0.80
0.60
0.40
0.20
4
3
2
1
0
0.00
-1
-2
-3
-4
-5
-0.20
-0.40
-0.60
-0.80
-1.00
-50
0
50
100
0
50
100
Temperature (ºC)
Temperature (ºC)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
17
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-20AB
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
2510
10
8
2508
2506
2504
2502
2500
6
4
2
0
-2
-4
-6
2498
2496
2494
-50
0
50
100
150
150
150
-50
0
50
100
150
Temperature (ºC)
Temperature (ºC)
Sensitivity vs. Temperature
Sensitivity Error vs. Temperature
4
3
104
103
102
101
100
99
2
1
0
-1
-2
-3
-4
-5
98
97
96
95
-50
0
50
100
150
-50
0
50
100
Temperature (ºC)
Temperature (ºC)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
1.00
0.80
0.60
0.40
0.20
4
3
2
1
0
0.00
-1
-2
-3
-4
-5
-0.20
-0.40
-0.60
-0.80
-1.00
-50
0
50
100
-50
0
50
100
150
Temperature (ºC)
Temperature (ºC)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
18
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-30AU
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
8
6
4
508
506
504
502
500
498
496
494
2
0
-2
-4
-6
-8
492
-50
0
50
100
150
150
150
-50
-50
-50
0
50
100
150
150
150
Temperature (ºC)
Temperature (ºC)
Sensitivity vs. Temperature
Sensitivity Error vs. Temperature
4
3
138
136
134
132
130
128
126
2
1
0
-1
-2
-3
-4
-5
-50
0
50
100
0
50
100
Temperature (ºC)
Temperature (ºC)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
1.00
0.80
0.60
0.40
0.20
4
3
2
1
0
0.00
-1
-2
-3
-4
-5
-0.20
-0.40
-0.60
-0.80
-1.00
-50
0
50
100
0
50
100
Temperature (ºC)
Temperature (ºC)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
19
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-30AB
Zero Current Output Voltage vs. Temperature
Offset Voltage vs. Temperature
2510
2508
2506
2504
2502
2500
2498
2496
2494
10
8
6
4
2
0
-2
-4
-6
-8
2492
-50
0
50
100
150
-50
0
50
100
150
Temperature (ºC)
Temperature (ºC)
Sensitivity vs. Temperature
Sensitivity Error vs. Temperature
69
68
67
66
65
64
63
62
4
3
2
1
0
-1
-2
-3
-4
-5
-50
0
50
100
150
-50
0
50
100
150
Temperature (ºC)
Temperature (ºC)
Nonlinearity vs. Temperature
Total Error at IPR(max) vs. Temperature
4
3
1.00
0.80
0.60
0.40
0.20
2
1
0
0.00
-1
-2
-3
-4
-5
-0.20
-0.40
-0.60
-0.80
-1.00
-50
0
50
100
150
-50
0
50
100
150
Temperature (ºC)
Temperature (ºC)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
20
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
CꢀARACTERISTIC PERFORꢁANCE
xLLCTR-50AB
Offset Voltage vs. Temperature
Zero Current Output Voltage vs. Temperature
8.00
6.00
4.00
2.00
0.00
-2.00
-4.00
-6.00
-8.00
2508
2506
2504
2502
2500
2498
2496
2494
2492
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Sensitivity Error vs. Temperature
Sensitivity vs. Temperature
6.00
4.00
2.00
0.00
-2.00
-4.00
-6.00
44
43
42
41
40
39
38
37
36
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
Total Error at IPR(max) vs. Temperature
Nonlinearity vs. Temperature
6.00
4.00
2.00
0.00
-2.00
-4.00
-6.00
0.50
0.25
0.00
-0.25
-0.50
-50
0
50
100
150
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
+3 Sigma
Average
-3 Sigma
Allegro MicroSystems, LLC
115 Northeast Cutoff
21
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
APPLICATION INFORꢁATION
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 vs. 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 below for the ACS724LLCTR-20AB. As expected, as one
goes towards zero current, the error in percent goes towards infin-
ity due to division by zero.
2
100 × VOE
(Sens × I )
2
ETOT (IP) = ESENS
+
P
8
6
4
-40ºC + 3σ
-40ºC – 3σ
25ºC + 3σ
25ºC – 3σ
85ºC + 3σ
85ºC – 3σ
2
0
-2
-4
-6
-8
0
5
10
15
20
Current (A)
Figure 1: Predicted Total Error as a Function of the Sensed Current for the ACS724LLCTR-20AB
Allegro MicroSystems, LLC
115 Northeast Cutoff
22
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
DEFINITIONS OF ACCURACꢃ CꢀARACTERISTICS
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 circuit sensitivity (G/A) (1 G = 0.1 mT)
and the linear IC amplifier gain (mV/G). The linear IC ampli-
fier gain is programmed at the factory to optimize the sensitivity
(mV/A) for the full-scale current of the device.
Accuracy Across
Temperature
Increasing
IOUT (V)
V
Accuracy at
25°C Only
Ideal VIOUT
Accuracy Across
Temperature
Nonlinearity (ELIN). 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:
Accuracy at
25°C Only
VIOUT(IPR(max)) – VIOUT(Q)
IPR(min)
–IP (A)
+IP (A)
VIOUT(Q)
1–
=
ELIN
• 100(%)
2 • VIOUT(IPR(max)/2) – VIOUT(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.
Full Scale IP
IPR(max)
0 A
Zero-Current Output Voltage (VIOUT(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. For example,
in the case of a bidirectional output device, VCC = 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 voltage trim and
thermal drift.
Accuracy at
25°C Only
Decreasing
IOUT (V)
V
Accuracy Across
Temperature
Figure 1: Output Voltage versus Sensed Current
+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 volt-
age to amperes, divide by the device sensitivity, Sens.
Total Output Error (ETOT). The difference between the cur-
rent 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:
Across Temperature
25°C Only
–I
P
+I
P
V
IOUT_ideal(IP) – VIOUT (IP)
ETOT (I )
P
=
• 100 (%)
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 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 Figures
1 and 2. Figure 1 shows a distribution of output voltages versus IP
at 25°C and across temperature. Figure 2 shows the correspond-
ing ETOT versus IP.
–E
TOT
Figure 2: Total Output Error versus Sensed Current
Allegro MicroSystems, LLC
115 Northeast Cutoff
23
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
Zero-Current Output Ratiometry Coefficient (QVO_RAT_
COEF). The coefficient defining how the zero-current output
voltage scales with VCC. The ideal coefficient is 1, meaning the
output voltage scales proportionally with VCC, always being
equal to VCC/2. A coefficient of 1.1 means that the zero-current
output voltage increases by 10% more than the ideal proportion-
ality case. This means that a 10% increase in VCC results in an
11% increase in the zero-current output voltage. This relationship
is described by the following equation:
Sensitivity Ratiometry Coefficient (SENS_RAT_COEF). The
coefficient defining how the sensitivity scales with VCC. The
ideal coefficient is 1, meaning the sensitivity scales proportion-
ally with VCC. A 10% increase in VCC results in a 10% increase
in sensitivity. A coefficient of 1.1 means that the sensitivity
increases by 10% more than the ideal proportionality case. This
means that a 10% increase in VCC results in an 11% increase in
sensitivity. This relationship is described by the following equa-
tion:
(VCC – 5 V) • QVO_RAT_COEF
(VCC – 5 V) • SENS_RAT_COEF
VIOUTQ(VCC ) = VIOUTQ(5 V)
Sens(VCC ) = Sens(5 V)
1 +
1 +
5 V
5 V
This can be rearranged to define the sensitivity ratiometry coef-
ficient as:
This can be rearranged to define the zero-current output ratiom-
etry coefficient as:
Sens(VCC )
Sens(5 V)
5 V
(VCC – 5 V)
VIOUTQ(VCC )
VIOUTQ(5 V)
5 V
– 1
SENS_RAT_COEF =
•
– 1
QVO_RAT_COEF =
•
(VCC – 5 V)
Allegro MicroSystems, LLC
115 Northeast Cutoff
24
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
DEFINITIONS OF DyNAmIC RESPONSE ChARACTERISTICS
Power-On Time (tPO). When the supply is ramped to its operat-
ing 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.
V
VCC
V
(typ.)
CC
V
IOUT
90% V
IOUT
VCC(min.)
tPO
t1
t2
t1= time at which power supply reaches
minimum specified operating voltage
t2= time at which output voltage settles
within ±10% of its steady state value
under an applied magnetic field
0
t
Figure 3: Power-On Tiꢀ e (tPO
)
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. 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.
Primary Current
(%)
90
V
IOUT
Rise Time, t
r
Propagation Delay (tpd). The propagation delay is measured
as the time interval 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.
20
10
0
t
Propagation Delay, t
pd
Figure 4: Rise Tiꢀ e (tr) and Propagation Delaꢁ (tpd)
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.
Primary Current
(%)
90
V
IOUT
Response Time, t
RESPONSE
0
t
Figure 5: Response Tiꢀ e (tRESPONSE
)
Allegro MicroSystems, LLC
115 Northeast Cutoff
25
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
PACKAGE OUTLING DRAWING
For Reference Only – Not for Tooling Use
(Reference MS-012AA)
Dimensions in millimeters – NOT TO SCALE
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
8°
0°
4.90 0.10
1.27
0.65
8
8
0.25
0.17
5.60
6.00 0.20
3.90 0.10
A
1.04 REF
1.75
1
2
1
2
1.27
0.40
PCB Layout Reference View
C
0.25 BSC
SEATING PLANE
GAUGE PLANE
Branded Face
C
8X
1.75 MAX
NNNNNNN
0.10
C
SEATING
PLANE
PPT-AAA
LLLLL
0.51
0.31
0.25
0.10
1.27 BSC
1
A
Terminal #1 mark area
Standard Branding Reference View
B
N = Device part number
P = Package Designator
T = Device temperature range
A = Amperage
L = Lot number
Belly Brand = Country of Origin
B
C
Branding scale and appearance at supplier discretion
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.
Figure 6: Package LC, 8-pin SOICN
Allegro MicroSystems, LLC
115 Northeast Cutoff
26
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
Revision historꢁ
Nuꢀ ber
Descriptioon
Pages
Responsible
Date
Added Characteristic Performance graphs and Application Information to
Preliminary draft to create Final draft
–
All
A. Latham
January 16, 2015
1
2
Corrected Features and Benefits
2
A. Latham
A. Latham
June 19, 2015
June 23, 2015
Added ACS724LLCTR-50AB-T variant with electrical characteristics
2, 9
Corrected Characteristic Performance graph legends; updated Lifetime Drift
Characteristics and added Error Over Lifetime electrical characteristics
A. Latham,
S. Milano
3
6-18
August 12, 2015
4
5
Added ACS724LLCTR-05AB-T variant with electrical characteristics
2, 6
1
W. Bussing
W. Bussing
August 8, 2016
June 28, 2017
Added AEC-Q100 qualified status
Added ACS724LLCTR-05AB-T and ACS724LLCTR-50AB-T Characteristic
Performance graphs
6
7
14, 21
W. Bussing
W. Bussing
August 3, 2017
Updated Clearance and Creepage rating values
3
2
5
January 10, 2018
Added Dielectric Surge Strength Test Voltage characteristic
Added Common Mode Field Rejection Ratio characteristic
8
W. Bussing
January 23, 2018
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.
For the latest version of this document, visit our website:
www.allegroꢀ icro.coꢀ
Allegro MicroSystems, LLC
115 Northeast Cutoff
27
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
相关型号：
ACS724LMA
Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 Package
ALLEGRO
ACS724LMATR-20AB-T
Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 Package
ALLEGRO
ACS724LMATR-30AU-T
Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 Package
ALLEGRO
ACS724LMATR-65AB-T
Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 Package
ALLEGRO
©2020 ICPDF网 联系我们和版权申明