ALLEGRO ACS37002LMABTR-066B3

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 commonmode 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 V_RMS, and 0.85 mΩ conductor resistance. The LA package is optimized for lower noise with 2250 V_RMS 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 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-platted leadframes.

• 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
• ±1% maximum sensitivity error over temperature (K series)
• ±8 mV maximum offset voltage over temperature
• Non-ratiometric operation with V_REF output
• Low noise LA package for 3.3 V supply, 124 mV_RMS 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
• Enabling measurement ranges from 10 to 133 A in both unidirectional and bidirectional modes
• Low internal primary conductor resistance 0.85 mΩ (MA) and 1 mΩ (LA) for better power efficiency
• UL 62368-1:2014 (ed. 2) certification, highly isolated compact SOICW-16 surface mount package (MA)
• 3125 V_RMS rated dielectric withstand voltage
• 1097 V_RMS / 1550 V_DC basic insulation voltages
• 565 V_RMS / 800 V_DC reinforced insulation voltages
• Wide operating temperature, -40℃ to 150℃
• AEC-Q100 Grade 0, automotive qualified