ACS37002
400 kHz, High Accuracy Current Sensor
with Pin-Selectable Gains and Adjustable Overcurrent Fast Fault in SOICW-16 Package
FEATURES AND BENEFITS
DESCRIPTION
• High operating bandwidth for fast control loops or where
high-speed currents are monitored
□ 400 kHz bandwidth
TheACS37002isafullyintegratedHall-effectcurrentsensorin
an SOICW-16 package that is factory-trimmed to provide high
accuracy over the entire operating range without the need for
customerprogramming.Thecurrentissenseddifferentiallyby
two Hall plates that subtract out interfering external common-
mode magnetic fields.
□ 2 µs typical response time
• High accuracy
□ 1% maximum sensitivity error over temperature (K series)
□ 6 mV maximum offset voltage over temperature
□ Non-ratiometric operation with VREF output
□ Low noise LA package
◊ 160 mVRMS for 3.3 V supply
◊ 124 mVRMS for 5 V supply
□ Differential sensing for high immunity to external
magnetic fields
□ No magnetic hysteresis
The package construction provides high isolation by
magnetically coupling the field generated by the current in
the conductor to the monolithic Hall sensor IC which has no
physical connection to the integrated current conductor. The
MA package is optimized for higher isolation with withstand
voltage, 4.8 kVRMS, and 0.85 mΩ conductor resistance. The
LA package is optimized for lower noise with 3.6 kVRMS
withstand voltage and 1 mΩ conductor resistance.
• Adjustable fast overcurrent fault
□ 1 µs typical response time
The ACS37002 has functional features that are externally
configurable and robust without the need for programming.
Two logic gain selection pins can be used to configure the
device to one of four defined sensitivities and corresponding
current ranges. A fast overcurrent fault output provides short-
circuit detection for system protection with a fault threshold
that is proportional to the current range and can be set with an
analog input. The reference pin provides a stable voltage that
corresponds to the 0A output voltage. This reference voltage
allowsfordifferentialmeasurementsaswellasadevice-referred
voltage to set the overcurrent fault threshold.
□ Pin adjustable threshold
• Externally configurable gain settings using two logic pins
□ Four adjustable gain levels for increased design
flexibility
Continued on the next page…
PACKAGE: 16-Pin SOICW (suffix MA/LA)
Not to scale
ACS37002
VCC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
MCU
GAIN_SEL_0
GND
IP+
IP+
IP+
IP+
RPU
GAIN_SEL_1
VREF
VCC
ADC
ADC
IP
VIOUT
IP-
IP-
IP-
IP-
CL
CREF
VOC
VCC
GND
VCC
Digital I/O
OCF
CBYPASS
RVOC(H)
CVOC
RVOC(L)
Figure 1: Typical Bidirectional Application
For more application circuits, refer to the Application and Theory section
ACS37002-DS, Rev. 3
MCO-0000900
December 16, 2020
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