ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
FEATURES AND BENEFITS
DESCRIPTION
• 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
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, switchedmode 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.
Continued on the next page…
TÜV America
Certificate Number:
U8V 18 02 54214 041
CB 14 11 54214 031
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.
CB Certificate Number:
US-32848-UL
PACKAGE: 8-Pin SOIC (suffix LC)
Continued on the next page…
Not to scale
1
+IP
2
IP+
IP+
VCC
ACS724
VIOUT
IP
3
–IP
4
IP–
IP–
8
FILTER
GND
7
CBYPASS
0.1 µF
6
5
CF
1 nF
CLOAD
The ACS724 outputs an
analog signal, VIOUT , that
changes proportionally
with the bidirectional AC
or DC primary sensed
current, IP , within the
specified measurement
range. The FILTER pin
can be used to decrease
the bandwidth in order
to optimize the noise
performance.
Typical Application
ACS724-DS, Rev. 21
MCO-0000227
May 18, 2022
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
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)
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 flip-chip device is considered
Pb-free. However, the solder bump connections are available in a
Pb-free or high-temperature Pb-based option. Part numbers followed
by -S are manufactured with tin-silver-based solder bumps, making
these parts Pb-free compliant without the use of RoHS exemptions.
Part numbers followed by -T are manufactured with Pb-based solder
bumps using allowed RoHS exemptions.
SELECTION GUIDE
Part Number
IPR
(A)
Sens(Typ)
at VCC = 5 V
(mV/A)
TA
(°C)
Packing
–40 to 150
Tape and Reel, 3000 pieces per reel
–40 to 150
Tape and Reel, 3000 pieces per reel
-S VARIANT [1]
ACS724LLCTR-2P5AB-S
±2.5
ACS724LLCTR-05AU-S
5
ACS724LLCTR-05AB-S
±5
ACS724LLCTR-10AU-S
10
ACS724LLCTR-10AB-S
±10
ACS724LLCTR-20AU-S
20
800
400
200
ACS724LLCTR-20AB-S
±20
100
ACS724LLCTR-30AU-S
30
133
ACS724LLCTR-30AB-S
±30
66
ACS724LLCTR-50AB-S
±50
40
-T VARIANT
[2]
ACS724LLCTR-2P5AB-T
±2.5
ACS724LLCTR-05AU-T
5
ACS724LLCTR-05AB-T
±5
ACS724LLCTR-10AU-T
10
ACS724LLCTR-10AB-T
±10
ACS724LLCTR-20AU-T
20
800
400
200
ACS724LLCTR-20AB-T
±20
100
ACS724LLCTR-30AU-T
30
133
ACS724LLCTR-30AB-T
±30
66
ACS724LLCTR-50AB-T
±50
40
[1] -S
denotes the lead-free construction with tin-silver-based solder bumps.
denotes Pb-contained construction with Pb-based solder bumps. Operating performance of -T and -S devices are identical. -T devices are RoHS compliant using allowed exemptions provided in Annex III and IV of Directive 2011/65/EU [Exemptions 7(a), 15, 15(a), as applicable].
[2] -T
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
SPECIFICATIONS
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
Operating Ambient Temperature
TA
Range L
–0.1
V
–40 to 150
°C
Junction Temperature
TJ(max)
165
°C
Storage Temperature
Tstg
–65 to 165
°C
ISOLATION CHARACTERISTICS
Characteristic
Symbol
Notes
Rating
Unit
VSURGE
Tested ±5 pulses at 2/minute in compliance to IEC 61000-4-5
1.2 µs (rise) / 50 µs (width).
6000
V
Agency type-tested for 60 seconds per UL standard 609501 (edition 2); production-tested at VISO for 1 second, in
accordance with UL 60950-1 (edition 2).
2400
VRMS
Maximum approved working voltage for basic (single)
isolation according to UL 60950-1 (edition 2)
420
Vpk or VDC
297
Vrms
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
Comparative Tracking Index
CTI
Material Group II
400 to 599
V
Dielectric Surge Strength Test Voltage [1]
Dielectric Strength Test Voltage [1]
Working Voltage for Basic Isolation [1]
Clearance
[1] Certification
VISO
VWVBI
pending.
THERMAL CHARACTERISTICS
Characteristic
Symbol
Test Conditions*
Package Thermal Resistance
(Junction to Ambient)
RθJA
Mounted on the Allegro 85-0740 evaluation board with
1500 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 Lead)
RθJL
Mounted on the Allegro ASEK724 evaluation board.
Value
Units
23
°C/W
5
°C/W
*Additional thermal information available on the Allegro website.
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
3
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
VCC
VCC
Master Current
Supply
To All Subcircuits
Programming
Control
POR
Hall
Current
Drive
Temperature
Sensor
CBYPASS
0.1 µF
EEPROM and
Control Logic
Offset
Control
IP+
Sensitivity
Control
Dynamic Offset
Cancellation
IP+
IP–
+
–
RF(int)
–
VIOUT
+
IP–
GND
CF
FILTER
Functional Block Diagram
PINOUT DIAGRAM AND TERMINAL LIST TABLE
Terminal List Table
IP+
1
8
VCC
IP+
2
7
VIOUT
IP–
3
6
FILTER
IP–
4
5
GND
Package LC, 8-Pin SOICN
Pinout Diagram
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
6
FILTER
Terminal for external capacitor that sets bandwidth
7
VIOUT
Analog output signal
8
VCC
Signal ground terminal
Device power supply terminal
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
4
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
COMMON ELECTRICAL CHARACTERISTICS [1]: Valid through the full range of TA , VCC = 5 V, CF = 0,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
4.5
–
5.5
V
–
10
14
mA
Supply Voltage
VCC
Supply Current
ICC
VCC = 5 V, output open
Output Capacitance Load
CL
VIOUT to GND
–
–
10
nF
Output Resistive Load
RL
VIOUT to GND
4.7
–
–
kΩ
Primary Conductor Resistance
RIP
TA = 25°C
–
1.2
–
mΩ
Primary Conductor Inductance
LIP
TA = 25°C
–
2
–
nH
kΩ
Internal Filter
Resistance [2]
Common Mode Field Rejection Ratio
Primary Hall Coupling Factor
Secondary Hall Coupling Factor
Hall Plate Sensitivity Matching
RF(int)
–
1.8
–
Uniform external magnetic field
–
40
–
dB
G1
TA = 25°C
–
11
–
G/A
G2
TA = 25°C
–
2.8
–
G/A
Sensmatch
TA = 25°C
–
±1
–
%
CMFRR
Rise Time
tr
TA = 25°C, CL = 1 nF
–
3
–
μs
Propagation Delay
tpd
TA = 25°C, CL = 1 nF
–
2
–
μs
Response Time
tRESPONSE
TA = 25°C, CL = 1 nF
–
4
–
μs
Output Slew Rate
SR
TA = 25°C, CL = 1 nF
–
0.53
–
V/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
IN
Input-referenced noise: CF = 4.7 nF,
CL = 1 nF, BW = 18 kHz, TA = 25°C
–
25
–
mA(rms)
–1.5
–
1.5
%
Nonlinearity
ELIN
Through full range of IP
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
–
–
VOH
RL = 4.7 kΩ
–
VCC – 0.3
–
V
VOL
RL = 4.7 kΩ
–
0.3
–
V
Saturation Voltage [3]
Power-On Time
tPO
TA = 25°C
–
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 Temperature, TJ(max), is not exceeded.
[2] R
F(int) forms an RC circuit via the FILTER pin.
[3] The sensor IC will continue to respond to current beyond the range of I until the high or low saturation voltage; however, the nonlinearity in this region will be worse than
P
through the rest of the measurement range.
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
5
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-2P5AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
–2.5
–
2.5
A
–
800
–
mV/A
–
VCC ×
0.5
–
V
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
%
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
Bidirectional, IP = 0 A
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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
%
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
6
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-05AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
0
–
5
A
–
800
–
mV/A
–
VCC ×
0.1
–
V
IP = IPR(max), TA = 25°C to 150°C
–2.5
±0.9
2.5
%
IP = IPR(max), TA = –40°C to 25°C
–6.5
±4.6
6.5
%
IP = IPR(max), TA = 25°C to 150°C
–2
±0.8
2
%
IP = IPR(max), TA = –40°C to 25°C
–6
±4.5
6
%
IP = 0 A, TA = 25°C to 150°C
–20
±10
20
mV
IP = 0 A, TA = –40°C to 25°C
–40
±18
40
mV
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
Unidirectional, IP = 0 A
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
7
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-05AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
–5
–
5
A
–
400
–
mV/A
–
VCC ×
0.5
–
V
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
%
NOMINAL PERFORMANCE
Current Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
Bidirectional, IP = 0 A
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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
%
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
8
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-10AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
0
–
10
A
–
400
–
mV/A
–
VCC ×
0.1
–
V
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
%
NOMINAL PERFORMANCE
Current-Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
Unidirectional, IP = 0 A
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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
%
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
9
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-10AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
–10
–
10
A
–
200
–
mV/A
Bidirectional, IP = 0 A
–
VCC ×
0.5
–
V
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
%
NOMINAL PERFORMANCE
Current-Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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
%
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
10
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-20AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
0
–
20
A
–
200
–
mV/A
Unidirectional, IP = 0 A
–
VCC ×
0.1
–
V
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
%
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
%
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
NOMINAL PERFORMANCE
Current-Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
11
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-20AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
–20
–
20
A
–
100
–
mV/A
Bidirectional, IP = 0 A
–
VCC ×
0.5
–
V
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
%
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
%
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
NOMINAL PERFORMANCE
Current-Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
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www.allegromicro.com
12
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-30AU PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
0
–
30
A
–
133
–
mV/A
Unidirectional, IP = 0 A
–
VCC ×
0.1
–
V
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
%
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
%
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
NOMINAL PERFORMANCE
Current-Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
13
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-30AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
–30
–
30
A
–
66
–
mV/A
Bidirectional, IP = 0 A
–
VCC ×
0.5
–
V
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
%
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
%
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
NOMINAL PERFORMANCE
Current-Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
14
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
xLLCTR-50AB PERFORMANCE CHARACTERISTICS: TA Range L, valid at TA = – 40°C to 150°C, VCC = 5 V, CF = 0,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.[1]
Max.
Unit
–50
–
50
A
–
40
–
mV/A
Bidirectional, IP = 0 A
–
VCC ×
0.5
–
V
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
%
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
%
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
NOMINAL PERFORMANCE
Current-Sensing Range
Sensitivity
Zero-Current Output Voltage
IPR
Sens
VIOUT(Q)
IPR(min) < IP < IPR(max)
ACCURACY PERFORMANCE
Total Output Error [2]
ETOT
TOTAL OUTPUT ERROR COMPONENTS [3] ETOT = ESENS + 100 × VOE/(Sens × IP)
Sensitivity Error
Esens
Voltage Offset Error
VOE
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.
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.
[2] Percentage
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
15
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
CHARACTERISTIC PERFORMANCE
ACS724 TYPICAL FREQUENCY RESPONSE
-3dB ≈ 120 kHz
For information regarding bandwidth characterization methods used for the ACS724, see the “Characterizing System Bandwidth”
application note (https://allegromicro.com/en/insights-and-innovations/technical-documents/hall-effect-sensor-ic-publications/aneffective-method-for-characterizing-system-bandwidth-an296169) on the Allegro website.
Allegro MicroSystems
955 Perimeter Road
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16
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
RESPONSE CHARACTERISTICS DEFINITIONS AND PERFORMANCE DATA
Response Time (tRESPONSE)
Rise Time (tr)
The time interval between a) when the sensed input current
reaches 90% of its final value, and b) when the sensor output
reaches 90% of its full-scale value.
The time interval between a) when the sensor reaches 10% of
its full-scale value, and b) when it reaches 90% of its full-scale
value.
Propagation Delay (tpd)
Output Slew Rate (SR)
The time interval between a) when the sensed input current
reaches 20% of its full-scale value, and b) when the sensor output
reaches 20% of its full-scale value.
The rate of change [V/µs] in the output voltage from a) when the
sensor reaches 10% of its full-scale value, and b) when it reaches
90% of its full-scale value.
Response Time, Propagation Delay, Rise Time, and Output Slew Rate
Applied current step with 10%-90% rise time = 1 μs
Test Conditions: TA = 25°C, CBYPASS = 0.1 µF, CL = 0 F
tRESPONSE
SR [V/μs]
tpd
tr
Allegro MicroSystems
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ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
POWER ON FUNCTIONAL DESCRIPTION AND PERFORMANCE DATA
Power-On Time (tPO)
Power-On Profile
When the supply is ramped to its operating voltage, the device
requires a finite amount of time to power its internal components
before responding to an input magnetic field. Power-On Time
(tPO) is defined as the time interval between a) when the power
supply has reached its minimum specified operating voltage
(VCC(min)), and b) when the sensor output has settled within
±10% of its steady-state value under an applied magnetic field.
After applying power, the part remains off in a known state
referred to as Power-on Reset, or POR. The device stays in this
state until the voltage reaches a point at which the device will
remain powered. The power-on profile below illustrates the
intended power on/off. A pull-down resistor was used on the
output of the tested device.
Power-On Time (tPO)
Test Conditions: TA = 25°C, CBYPASS = 0.1 µF, RPD = 10 kΩ,
1V Ouput Swing
Power-On Profile
Supply voltage ramp rate = 1V/ms
Test Conditions: TA = 25°C, CBYPASS = 0.1 µF, RPD = 10 kΩ
Allegro MicroSystems
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Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
APPLICATION INFORMATION
Estimating Total Error vs. Sensed Current
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:
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 components of Total Error, Sensitivity Error, and Voltage Offset Error.
The ±3 sigma value for Total Error (ETOT) as a function of the
sensed current (IP) is estimated as:
2
Total Error (% of Current Measured)
ETOT (IP) = ESENS +
(
100 × VOE
Sens × IP
ETOTAVG (IP) = ESENSAVG +
100 × VOEAVG
Sens × IP
The resulting total error will be a sum of ETOT and ETOT_AVG.
Using these equations and the 3 sigma distributions for Sensitivity Error and Voltage Offset Error, 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 infinity due to division by zero (refer to Figure 1).
2
)
8
6
-40ºC + 3σ
4
-40ºC – 3σ
2
25ºC + 3σ
0
25ºC – 3σ
-2
85ºC + 3σ
-4
85ºC – 3σ
-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
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19
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
Thermal Rise vs. Primary Current
Self-heating due to the flow of current should be considered during the design of any current sensing system. The sensor, printed
circuit board (PCB), and contacts to the PCB will generate heat as
current moves through the system.
The thermal response is highly dependent on PCB layout, copper
thickness, cooling techniques, and the profile of the injected current. The current profile includes peak current, current “on-time”,
and duty cycle. While the data presented in this section was collected with Direct-Current (DC), these numbers may be used to
approximate thermal response for both AC signals and current
pulses.
The thermal capacity of the ACS724 should be verified by the end
user in the application’s specific conditions. The maximum junction temperature, TJ(MAX) (165℃), should not be exceeded. Further information on this application testing is available in the DC
and Transient Current Capability application note on our website.
ASEK724 Evaluation Board Layout
Thermal data shown in Figure 2 and Figure 3 was collected using
the ASEK724 Evaluation Board (TED-85-0740-003). This board
includes 1500 mm2 of 4 oz. copper (0.1388 mm) connected to pins
1 and 2, and to pins 3 and 4, with thermal vias connecting the layers. Top and Bottom layers of the PCB are shown below in Figure
4.
The plot in Figure 2 shows the measured rise in steady-state die
temperature of the ACS724 versus continuous current at an ambient temperature, TA, of 25 °C. The thermal offset curves may be
directly applied to other values of TA. Conversely, Figure 3 shows
the maximum continuous current at a given TA. Surges beyond the
maximum current listed in Figure 3 are allowed given the maximum junction temperature, TJ(MAX) (165℃), is not exceeded.
Figure 2: Self Heating in the LC Package
Due to Current Flow
Figure 4: Top and Bottom Layers for
ASEK724 Evaluation Board
Figure 3: Maximum Continuous Current
at a Given TA
Gerber files for the ASEK724 evaluation board are available
for download from the Allegro website. Please see the technical
documents section of the ACS724 device webpage.
Allegro MicroSystems
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20
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
DEFINITIONS OF ACCURACY CHARACTERISTICS
Sensitivity (Sens). The change in sensor IC output in response to
a 1 A 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 amplifier gain is programmed at the factory to optimize the sensitivity
(mV/A) for the full-scale current of the device.
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:
VIOUT(IPR(max)) – VIOUT(Q)
ELIN = 1–
• 100(%)
2 • VIOUT(IPR(max)/2) – VIOUT(Q)
Increasing
VIOUT (V)
Accuracy at
25°C Only
IPR(min)
ETOT (IP) =
+IP (A)
VIOUT(Q)
–IP (A)
Full Scale IP
IPR(max)
0A
Accuracy at
25°C Only
Decreasing
VIOUT (V)
Accuracy Across
Temperature
Figure 5: Output Voltage versus Sensed Current
+ETOT
Voltage Offset Error (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.
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:
Accuracy at
25°C Only
Ideal VIOUT
Accuracy Across
Temperature
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.
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 Across
Temperature
Across Temperature
25°C Only
–IP
+IP
VIOUT_ideal(IP) – VIOUT (IP)
• 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 Voltage Offset Error (VOE ). In fact, at IP = 0,
ETOT approaches infinity due to the offset. This is illustrated in
Figure 5 and Figure 6. Figure 5 shows a distribution of output
voltages versus IP at 25°C and across temperature. Figure 6
shows the corresponding ETOT versus IP .
–ETOT
Figure 6: Total Output Error versus Sensed Current
Allegro MicroSystems
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21
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
ACS724
Sensitivity Ratiometry Coefficient (SENS_RAT_COEF). The
coefficient defining how the sensitivity scales with VCC. The
ideal coefficient is 1, meaning the sensitivity scales proportionally 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 equation:
Sens(VCC ) = Sens(5 V)
1+
(VCC – 5 V) • SENS_RAT_COEF
5V
This can be rearranged to define the sensitivity ratiometry coefficient as:
SENS_RAT_COEF =
Sens(VCC )
5V
–1 •
(VCC – 5 V)
Sens(5 V)
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 proportionality 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:
VIOUTQ(VCC ) = VIOUTQ(5 V)
1+
(VCC – 5 V) • QVO_RAT_COEF
5V
This can be rearranged to define the zero-current output ratiometry coefficient as:
QVO_RAT_COEF =
VIOUTQ(VCC )
5V
–1 •
(VCC – 5 V)
VIOUTQ(5 V)
Allegro MicroSystems
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22
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
4.90 ±0.10
8°
0°
D 1.67 ±0.10
8
0.25
0.17
D1
D2
NNNNNNN
3.90 ±0.10
6.00 ±0.20
PPT-AAA
A
D 1.71 ±0.10
LLLLL
1.04 REF
1
1
2
B
1.27
0.40
D
2.45 ±0.10
N = Device part number
P = Package Designator
T = Device temperature range
A = Amperage
L = Lot number
Belly Brand = Country of Origin
0.25 BSC
SEATING PLANE
Branded Face
GAUGE PLANE
C
8X
0.10
1.75 MAX
C
0.51
0.31
SEATING
PLANE
0.25
0.10
1.27 BSC
1.27
0.65
Package Outline
A
Terminal #1 mark area
B
Branding scale and appearance at supplier discretion
C
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.
D
Hall elements (D1, D2); not to scale
1.27
0.65
8
8
1.27
5.60
7.35
4.20
1.75
7.35
1.575
1
C
Standard Branding Reference View
2
PCB Layout Reference View 1
Slot in PCB to maintain
4.2 mm creepage once
part is on PCB
1
C
2
PCB Layout Reference View 2
For PCB assemblies that cannot support a slotted design,
the above stretched footprint may be used.
Figure 7: Package LC, 8-pin SOICN
Allegro MicroSystems
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23
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
Revision History
Number
Descriptioon
Pages
Responsible
Date
All
A. Latham
January 16, 2015
–
Added Characteristic Performance graphs and Application Information to
Preliminary draft to create Final draft
1
Corrected Features and Benefits
2
A. Latham
June 19, 2015
2
Added ACS724LLCTR-50AB-T variant with electrical characteristics
2, 9
A. Latham
June 23, 2015
3
Corrected Characteristic Performance graph legends; updated Lifetime Drift
Characteristics and added Error Over Lifetime electrical characteristics
6-18
A. Latham,
S. Milano
August 12, 2015
4
Added ACS724LLCTR-05AB-T variant with electrical characteristics
2, 6
W. Bussing
August 8, 2016
5
Added AEC-Q100 qualified status
1
W. Bussing
June 28, 2017
6
Added ACS724LLCTR-05AB-T and ACS724LLCTR-50AB-T Characteristic
Performance graphs
14, 21
W. Bussing
August 3, 2017
7
Updated Clearance and Creepage rating values
3
W. Bussing
January 10, 2018
Added Dielectric Surge Strength Test Voltage characteristic
2
Added Common Mode Field Rejection Ratio characteristic
5
W. Bussing
January 23, 2018
W. Bussing
April 13, 2018
W. Bussing
May 14, 2018
8
9
10
Added ACS724LLCTR-2P5AB-T variant with electrical characteristics
2, 6
Updated PCB Layout References in Package Outline Drawing
27
Added Hall dimensions in Package Outline Drawing
27
Added ACS724LLCTR-40AU-T variant with electrical characteristics and
performance graphs
2, 14, 23
Added ACS724LLCTR-2P5AB-T performance graphs
16
M. McNally
Added Typical Frequency Response plots
26
W. Bussing
12
Added “Thermal Rise vs. Primary Current” and “ASEK724/5 Evaluation Board
Layout” to the Applications Information section
28
W. Bussing
July 3, 2018
13
Corrected ACS724LLCTR-40AU-T Total Output Error and Sensitivity Error values
14
M. McNally
November 15, 2018
14
Updated certificate numbers
1
V. Mach
December 13, 2018
15
Updated TUV certificate mark
1
M. McNally
June 3, 2019
16
Added Maximum Current value to Absolute Maximum Ratings table; added
ESD Ratings Table; updated Isolation Characteristics Table; updated Rise
Time, Response Time, Propagation Delay, and Output Slew Rate test
conditions; added Primary Conductor Inductance and Output Slew Rate
values; added Typical Frequency Response application page; added Response
Characteristics Definitions and Performance Data; added Power On Functional
Description and Performance Data; added thermal data section; corrected
Voltage Offset to Voltage Offset Error
All
K. Hampton
April 3, 2020
17
Updated Functional Block Diagram
4
K. Hampton
February 1, 2021
18
Removed Maximum Continuous Current from Absolute Maximum Ratings table;
added -S lead free part variants; updated Common Electrical Characteristics table
All
K. Hampton
July 20, 2021
19
Added ACS724LLCTR-05AU-T and ACS724LLCTR-05AU-S variant with
electrical characteristics
3, 8
K. Hampton
August 2, 2021
20
Removed Advanced designation from lead free part variants; removed ESD
Ratings table; removed ACS724LLCTR-40AU-T part variant; minor editorial edits
3
K. Hampton
April 14, 2022
21
Merged Selection Guide tables
2
K. Hampton
May 18, 2022
11
June 22, 2018
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
24
ACS724
Automotive-Grade, Galvanically Isolated Current Sensor IC
with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package
Copyright 2022, Allegro MicroSystems.
Allegro MicroSystems reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit
improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of
Allegro’s product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems assumes no responsibility for its use; nor
for any infringement of patents or other rights of third parties which may result from its use.
Copies of this document are considered uncontrolled documents.
For the latest version of this document, visit our website:
www.allegromicro.com
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
25
