ACS37002LMC
400 kHz, High Accuracy Current Sensor
with Pin-Selectable Gains and Adjustable Overcurrent Fast Fault in SOICW-16 Package
FEATURES AND BENEFITS
• Low internal primary conductor resistance (0.27 mΩ) for
better power efficiency and low heat dissipation
• High operating bandwidth and response time to enable
reliable current measurements in applications where
fast control loops are used or high-speed currents are
monitored
□ 400 kHz bandwidth
□ 1.1 µs typical response time
• High accuracy current measurements
□ ±1.5 % maximum sensitivity error over temperature
□ ±10 mV maximum offfset voltage over temperature
□ Non-ratiometric operation with VREF output
□ Differential sensing for high immunity to external
magnetic fields
□ No magnetic hysteresis
• Adjustable fast overcurrent fault
□ 1 µs typical response time
□ Pin adjustable threshold
• Externally configurable gain settings using two logic pins
□ Four adjustable gain levels for increased design flexibility
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PACKAGE:
16-pin SOICW
(suffix MC)
Not to scale
DESCRIPTION
The ACS37002LMC is a fully integrated Hall-effect current
sensor in an SOICW-16 package that is factory-trimmed to
provide high accuracy over the entire operating range without
the need for customer programming. The current is sensed
differentially by two Hall plates that subtract out interfering
external common-mode magnetic fields.
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
MC package is optimized for high isolation with withstand
voltage, 5 kVRMS, and 0.27 mΩ conductor resistance, ideal
for low power dissipation constraints.
The ACS37002LMC 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 0 A output voltage. This reference voltage
allows for differential measurements as well as a device-referred
voltage to set the overcurrent fault threshold.
Devices are RoHS compliant and lead (Pb) free with 100%
matte-tin-plated leadframes.
ACS37002LMC
1 IP+
GAIN_SEL_0 16
2 IP+
GND 15
3 IP+
GAIN_SEL_1 14
4 IP+
IP
5 IP-
VOC 13
VIOUT 12
6 IP-
7 IP-
VREF 11
VCC 10
VCC
8 IP-
OCF 9
CBYPASS
VCC
MCU
VCC
RPU
R1
CVREF CL
ADC
ADC
GND
Digital IO
R2
CVOC
Figure 1: Typical Bidirectional Application Showing 00 Gain Select Configuration.
For more application circuits, refer to the Application and Theory section.
ACS37002LMC-DS, Rev. 2
MCO-0001015
January 11, 2022
