FEATURES AND BENEFITS
• Low internal primary conductor resistance (265 μΩ) for
better power efficiency and low dissipation
• High operating bandwidth for fast control loops or where
high-speed currents are monitored
□ 400 kHz bandwidth
□ 1.1 μs typical response time
• High accuracy
□ As low as 1% maximum sensitivity error over
temperature
□ 8 mV maximum offset voltage over temperature
□ Non-ratiometric operation with VREF output
□ Differential sensing robust against external magnetic
fields
□ No magnetic hysteresis
• UL-certified to 62368-1, highly isolated compact
SOIC16W surface mount package
□ 5 kVRMS rated isolation test voltage
□ 1144 VRMS / 1618 VDC basic isolation voltages
□ 572 VRMS / 809 VDC reinforced isolation voltages
• Wide operating temperature, –40°C to 125°C
• Maximum 70 ARMS continuous operating current at 85°C
DESCRIPTION
The ACS37003 is a fully integrated current sensor IC that
senses current flowing through the custom SOICW16
package. The current conductor has a very low (265 μΩ)
resistance, ideal for low power dissipation. The sensor is
factory-trimmed to provide high accuracy over the entire
operating range without the need for customer programming
or calibration.
The internal construction provides high isolation by magnetically coupling the field generated by current flow in the
conductor to the fully monolithic Hall sensor IC. The current is sensed differentially by two Hall plates that subtract
out interfering common-mode magnetic fields. The IC has
no physical connection to the integrated current conductor and provides 5 kVRMS isolation between the primary
and secondary signal leads of the package. This high rating
provides an industry-leading basic working voltage of 1140
VRMS and a reinforced working voltage of 572 VRMS.
The ACS37003KMC is provided in a custom SOICW16 surface mount package. The pin pitch is the same as a standard
SOIC16, but the lead-frame is 2.5 times as thick to reduce
the resistance. The package body is sized to achieve greater
than 8.2 mm of creepage and clearance. 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, making the device RoHS
compliant.