ACS37002 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - High operating bandwidth for fast control loops or where high-speed currents are monitored - 400 k Hz bandwidth - 1.1 µs typical response time - High accuracy - ±1% maximum sensitivity error over temperature (K series) - ±8 m V maximum offset voltage over temperature - Non-ratiometric operation with VREF output - Low noise LA package ◊ 160 m VRMS for 3.3 V supply ◊ 124 m VRMS for 5 V supply - 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 Continued on the next page… PACKAGE: 16-Pin SOICW (suffix MA/LA) Not to scale DESCRIPTION The ACS37002 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 monmode 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 MA package is optimized for higher isolation with dielectric withstand voltage, 3125 VRMS, and 0.85 mΩ conductor resistance. The LA package is optimized for lower noise with 2250 VRMS dielectric withstand voltage and 1 mΩ conductor resistance. 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 shortcircuit detection for system protection with a fault threshold that is...