Not to scale
The Allegro™ 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.
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
noisy environments. The inherent device accuracy is optimized
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.
The internal resistance of this conductive path is 1.2 mΩ typical,
providing low power loss.
The terminals of the conductive path are electrically isolated
from the sensor leads (pins 5 through 8). This allows the
ACS724 current sensor IC to be used in high-side current sense
applications without the use of high-side differential amplifiers
or other costly isolation techniques.
ACS724-DS, Rev. 14
MCO-0000227
• AEC-Q100 qualified
• 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
• 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
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
Continued on the next page…
Typical Application
CBYPASS
0.1 µF
CF
1 nF
ACS724
CLOAD
1
2
3
4
8
7
6
5
IP+
+IP
–IP
IP+
IP–
IP–
VCC
VIOUT
FILTER
GND
IP
The ACS724 outputs an
analog signal, VIOUT , that
changes proportionally
with the bidirectional AC
or DC primary sensed
current, IP , within the
specied measurement
range. The FILTER pin
can be used to decrease
the bandwidth in order
to optimize the noise
performance.
FEATURES AND BENEFITS DESCRIPTION
PACKAGE: 8-Pin SOIC (suffix LC)
CB Certicate Number:
US-32848-UL
TÜV America
Certificate Number:
U8V 18 02 54214 041
CB 14 11 54214 031
Type
tested
Continued on the next page…
ACS724
December 13, 2018
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
2
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
SELECTION GUIDE
Part Number IPR
(A)
Sens(Typ)
at VCC = 5 V
(mV/A)
TA
(°C) Packing*
ACS724LLCTR-2P5AB-T ±2.5 800
–40 to 150 Tape and Reel, 3000 pieces per reel
ACS724LLCTR-05AB-T ±5 400
ACS724LLCTR-10AU-T 10 400
ACS724LLCTR-10AB-T ±10 200
ACS724LLCTR-20AU-T 20
ACS724LLCTR-20AB-T ±20 100
ACS724LLCTR-30AU-T 30 133
ACS724LLCTR-30AB-T ±30 66
ACS724LLCTR-40AU-T 40 100
ACS724LLCTR-50AB-T ±50 40
*Contact Allegro for additional packing options.
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.
FEATURES AND BENEFITS (continued)
• 5 V, single supply operation
• 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
DESCRIPTION (continued)
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
3
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
THERMAL CHARACTERISTICS
Characteristic Symbol Test Conditions* Value Units
Package Thermal Resistance
(Junction to Ambient) RθJA
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.
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.
ISOLATION CHARACTERISTICS
Characteristic Symbol Notes Rating Unit
Dielectric Surge Strength Test Voltage VSURGE Tested ±5 pulses at 2/minute in compliance to IEC 61000-4-5
1.2 µs (rise) / 50 µs (width). 6000 V
Dielectric Strength Test Voltage VISO
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).
2400 VRMS
Working Voltage for Basic Isolation VWVBI Maximum approved working voltage for basic (single)
isolation according to UL 60950-1 (edition 2)
420 Vpk or VDC
297 Vrms
Clearance Dcl Minimum distance through air from IP leads to signal leads. 4.2 mm
Creepage Dcr Minimum distance along package body from IP leads to
signal leads. 4.2 mm
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Notes Rating Units
Supply Voltage VCC 6 V
Reverse Supply Voltage VRCC –0.1 V
Output Voltage VIOUT VCC + 0.5 V
Reverse Output Voltage VRIOUT –0.1 V
Operating Ambient Temperature TARange L –40 to 150 °C
Junction Temperature TJ(max) 165 °C
Storage Temperature Tstg –65 to 165 °C
SPECIFICATIONS
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
4
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Dynamic Offset
Cancellation
Master Current
Supply Programming
Control
EEPROM and
Control Logic
Offset
Control
Sensitivity
Control
Temperature
Sensor
Hall
Current
Drive
POR
To All Subcircuits
IP+
IP+
IP–
IP–
VCC
VCC
VIOUT
CBYPASS
0.1 µF
FILTER
RF(int)
GND CF
+
–
+
–
Terminal List Table
Number Name Description
1, 2 IP+ Terminals for current being sensed; fused internally
3, 4 IP– Terminals for current being sensed; fused internally
5 GND Signal ground terminal
6 FILTER Terminal for external capacitor that sets bandwidth
7 VIOUT Analog output signal
8 VCC Device power supply terminal
Functional Block Diagram
Package LC, 8-Pin SOICN
Pinout Diagram
IP+
IP+
IP–
IP–
VCC
VIOUT
FILTER
GND
1
2
3
4
8
7
6
5
PINOUT DIAGRAM AND TERMINAL LIST TABLE
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
5
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
Supply Voltage VCC 4.5 – 5.5 V
Supply Current ICC VCC = 5 V, output open – 10 14 mA
Output Capacitance Load CLVIOUT to GND – – 10 nF
Output Resistive Load RLVIOUT to GND 4.7 – – kΩ
Primary Conductor Resistance RIP TA = 25°C – 1.2 – mΩ
Internal Filter Resistance [2] RF(int) – 1.8 – kΩ
Common Mode Field Rejection Ratio CMFRR Uniform external magnetic field – 40 – dB
Primary Hall Coupling Factor G1 TA = 25°C – 11 – G/A
Secondary Hall Coupling Factor G2 TA = 25°C – 2.8 – G/A
Hall Plate Sensitivity Matching Sensmatch TA = 25°C – ±1 – %
Rise Time trIP = IP(max), TA = 25°C, CL = 1 nF – 3 – μs
Propagation Delay tpd IP = IP(max), TA = 25°C, CL = 1 nF – 2 – μs
Response Time tRESPONSE IP = IP(max), TA = 25°C, CL = 1 nF – 4 – μs
Bandwidth BW Small signal –3 dB; CL = 1 nF – 120 – kHz
Noise Density IND Input-referenced noise density;
TA = 25°C, CL = 1 nF – 150 – µA(rms)/
√Hz
Noise INInput-referenced noise: CF = 4.7 nF,
CL = 1 nF, BW = 18 kHz, TA = 25°C – 20 – mA(rms)
Nonlinearity ELIN Through full range of IP–1.5 – +1.5 %
Sensitivity Ratiometry Coefficient SENS_RAT_
COEF VCC = 4.5 to 5.5 V, TA = 25°C – 1.3 – –
Zero-Current Output Ratiometry Coefficient QVO_RAT_
COEF VCC = 4.5 to 5.5 V, TA = 25°C – 1 – –
Saturation Voltage [3] VOH RL = 4.7 kΩ – VCC – 0.3 – V
VOL RL = 4.7 kΩ – 0.3 – V
Power-On Time tPO Output reaches 90% of steady-state
level, TA = 25°C, IP = IPR(max) applied – 80 – μs
Shorted Output-to-Ground Current ISC(GND) TA = 25°C – 3.3 – mA
Shorted Output-to-VCC Current ISC(VCC) TA = 25°C – 45 – 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] RF(int) forms an RC circuit via the FILTER pin.
[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.
COMMON ELECTRICAL CHARACTERISTICS [1]: Valid through the full range of TA , VCC
= 5 V, CF = 0,
unless otherwise specied
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
6
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-2P5AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit
NOMINAL PERFORMANCE
Current Sensing Range IPR –2.5 – 2.5 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 800 – mV/A
Zero-Current Output Voltage VIOUT(Q) Bidirectional, IP = 0 A – VCC ×
0.5 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2.5 ±1.5 2.5 %
IP = IPR(max), TA = –40°C to 25°C –6.5 ±4.5 6.5 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –2 ±1 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4.5 6 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –20 ±7 20 mV
IP = 0 A, TA = –40°C to 25°C –40 ±13 40 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
7
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-05AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit
NOMINAL PERFORMANCE
Current Sensing Range IPR –5 – 5 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 400 – mV/A
Zero-Current Output Voltage VIOUT(Q) Bidirectional, IP = 0 A – VCC ×
0.5 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2.5 ±1.5 2.5 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4.5 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –2 ±1 2 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4.5 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –15 ±7 15 mV
IP = 0 A, TA = –40°C to 25°C –30 ±13 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
8
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-10AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR 0 – 10 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 400 – mV/A
Zero-Current Output Voltage VIOUT(Q) Unidirectional, IP = 0 A – VCC ×
0.1 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2.5 ±1.5 2.5 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4.5 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –2 ±1 2 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4.5 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –15 ±7 15 mV
IP = 0 A, TA = –40°C to 25°C –30 ±13 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
9
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-10AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ.1 Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR –10 – 10 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 200 – mV/A
Zero-Current Output Voltage VIOUT(Q) Bidirectional, IP = 0 A – VCC ×
0.5 – V
ACCURACY PERFORMANCE
Total Output Error2ETOT
IP = IPR(max), TA = 25°C to 150°C –2 ±1 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4.5 6 %
TOTAL OUTPUT ERROR COMPONENTS3 ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –1.5 ±1 1.5 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4.5 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –10 ±6 10 mV
IP = 0 A, TA = –40°C to 25°C –30 ±8 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
10
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-20AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR 0 – 20 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 200 – mV/A
Zero-Current Output Voltage VIOUT(Q) Unidirectional, IP = 0 A – VCC ×
0.1 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2 ±0.7 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –1.5 ±0.7 1.5 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –10 ±6 10 mV
IP = 0 A, TA = –40°C to 25°C –30 ±8 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
11
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-20AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR –20 – 20 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 100 – mV/A
Zero-Current Output Voltage VIOUT(Q) Bidirectional, IP = 0 A – VCC ×
0.5 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2 ±0.8 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –1.5 ±0.6 1.5 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –10 ±5 10 mV
IP = 0 A, TA = –40°C to 25°C –30 ±6 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
12
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-30AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR 0 – 30 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 133 – mV/A
Zero-Current Output Voltage VIOUT(Q) Unidirectional, IP = 0 A – VCC ×
0.1 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2 ±0.7 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –1.5 ±0.7 1.5 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –10 ±6 10 mV
IP = 0 A, TA = –40°C to 25°C –30 ±7 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
13
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-30AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR –30 – 30 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 66 – mV/A
Zero-Current Output Voltage VIOUT(Q) Bidirectional, IP = 0 A – VCC ×
0.5 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2 ±0.8 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –1.5 ±0.8 1.5 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –10 ±6 10 mV
IP = 0 A, TA = –40°C to 25°C –30 ±6 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
14
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-40AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR 0 – 40 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 100 – mV/A
Zero-Current Output Voltage VIOUT(Q) Unidirectional, IP = 0 A – VCC ×
0.1 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2 ±0.7 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –1.5 ±0.7 1.5 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –10 ±6 10 mV
IP = 0 A, TA = –40°C to 25°C –30 ±7 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
15
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
xLLCTR-50AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V, CF = 0,
unless otherwise specied
Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit
NOMINAL PERFORMANCE
Current-Sensing Range IPR –50 – 50 A
Sensitivity Sens IPR(min) < IP < IPR(max) – 40 – mV/A
Zero-Current Output Voltage VIOUT(Q) Bidirectional, IP = 0 A – VCC ×
0.5 – V
ACCURACY PERFORMANCE
Total Output Error [2] ETOT
IP = IPR(max), TA = 25°C to 150°C –2 ±0.8 2 %
IP = IPR(max), TA = –40°C to 25°C –6 ±4 6 %
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error Esens
IP = IPR(max), TA = 25°C to 150°C –1.5 ±0.8 1.5 %
IP = IPR(max), TA = –40°C to 25°C –5.5 ±4 5.5 %
Offset Voltage VOE
IP = 0 A, TA = 25°C to 150°C –10 ±6 10 mV
IP = 0 A, TA = –40°C to 25°C –30 ±6 30 mV
LIFETIME DRIFT CHARACTERISTICS
Sensitivity Error Lifetime Drift Esens_drift –3 ±1 3 %
Total Output Error Lifetime Drift Etot_drift –3 ±1 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 oset voltage, as that would violate the maximum/minimum total output
error specication. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
16
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
CHARACTERISTIC PERFORMANCE
xLLCTR-2P5AB
Average+3 Sigma -3 Sigma
2480
2485
2490
2495
2500
2505
2510
2515
2520
2525
-50 050 100 150
VIOUT(Q) (mV)
Temperature (°C)
Zero Current Output Voltage vs. Temperature
760
770
780
790
800
810
820
-50 050 100 150
Sensitivity (mV/A)
Temperature (°C)
Sensitivity vs. Temperature
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.25
0.5
0.75
1
1.25
1.5
-50 050 100 150
Nonlinearity (%)
Temperature (°C)
Nonlinearity vs. Temperature
-6
-4
-2
0
2
4
6
-50 050 100 150
Total Error (%)
Temperature (°C)
Total Error at IPR(max) vs. Temperature
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
-50 050 100 150
Offset Voltage (mV)
Temperature (°C)
Offset Voltage vs. Temperature
-6
-4
-2
0
2
4
6
-50 050 100 150
Sensitivity Error (%)
Temperature (°C)
Sensitivity Error vs. Temperature
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
17
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
CHARACTERISTIC PERFORMANCE
xLLCTR-05AB
Average+3 Sigma -3 Sigma
2485
2490
2495
2500
2505
2510
2515
-50 050 100 150
VIOUT(Q) (mV)
Temperature (°C)
Zero Current Output Voltage vs. Temperature
375
380
385
390
395
400
405
410
415
420
425
-50 050 100 150
Sensitivity (mV/A)
Temperature (°C)
Sensitivity vs. Temperature
-1.00
-0.75
-0.50
-0.25
0.00
0.25
0.50
0.75
1.00
-50 050 100 150
Nonlinearity (%)
Temperature (°C)
Nonlinearity vs. Temperature
-8.00
-6.00
-4.00
-2.00
0.00
2.00
4.00
6.00
8.00
-50 050 100 150
Total Error (%)
Temperature (°C)
Total Error at IPR(max) vs. Temperature
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
-50 050 100 150
Offset Voltage (mV)
Temperature (°C)
Offset Voltage vs. Temperature
-8.00
-6.00
-4.00
-2.00
0.00
2.00
4.00
6.00
8.00
-50 050 100 150
Sensitivity Error (%)
Temperature (°C)
Sensitivity Error vs. Temperature
Automotive-Grade, Galvanically Isolated Current Sensor IC
With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
18
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
CHARACTERISTIC PERFORMANCE
xLLCTR-10AU
515
510
505
500
495
490
485
-50 050 100 150
Temperature (ºC)
V (mV)
IOUT(Q)
Zero Current Output Voltage vs. Temperature
-15
-10
-5
0
5
10
15
-50 050 100 150
Temperature (ºC)
Offset Voltage (mV)
Offset Voltage vs. Temperature
415
410
405
400
395
390
385
380
375
-50 050 100 150
Temperature (ºC)
Sensitivity (mV/A)
Sensitivity vs. Temperature
3
2
4
1
0
-1
-2
-3
-4
-5
-6
-50 050 100 150
Temperature (ºC)
Sensitivity Error (%)
Sensitivity Error vs. Temperature
1.00
0.80
0.60
0.40
0.20
0.00
-0.20
-0.60
-0.40
-0.80
-1.00
-50 050 100 150
Temperature (ºC)
Nonlinearity (%)
Nonlinearity vs. Temperature
4
3
2
1
0
-1
-2
-4
-3
-5
-6
-50 050 100 150
Temperature (ºC)
Total Error (%)
Total Error at I vs. Temperature
PR(max)
Average+3 Sigma -3 Sigma