ACS724KMATR-20AB-T

Current Sensors Overview

The ACS724KMATR-20AB-T is a board-mount current sensor manufactured by Allegro MicroSystems. It utilizes Hall-effect technology to provide differential, bidirectional current sensing with a rated current of 20 A. The device features an analog voltage output and operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a sensitivity of 100 mV/A, a response time of 4 µs, and a frequency bandwidth up to 120 kHz. It is housed in a 16-SOIC package (0.295" width) and supports operation temperatures from -40°C to +125°C.

Current Sensors Feature Summary

• Provides galvanic isolation between the high-current path and low-voltage control circuitry via integrated Hall-effect sensing technology.
• Delivers a differential analog voltage output proportional to the sensed current for accurate signal processing.
• Supports bidirectional current measurement, enabling detection of both positive and negative current flow directions.

Current Sensors Applications

• Motor drive current monitoring and control
• DC-DC converter output current sensing
• Battery management systems in electric vehicles

Current Sensors Procurement Notes

Verify the specific suffix codes on the component marking against the official Allegro MicroSystems datasheet to confirm pinout configuration and sensitivity ratings. Ensure that the ordering part number matches the required package type and temperature range specifications before finalizing procurement orders to avoid integration errors.

Current Sensors Selection Notes

Select this component when bidirectional current sensing is required for applications involving motor drives or inverters. The 20 A rating suits moderate power levels, while the 16-SOIC package offers a compact footprint compared to larger through-hole alternatives. Consider the 100 mV/A sensitivity for compatibility with standard ADC input ranges in microcontroller-based designs.

Current Sensors Part Context

This part belongs to the ACS724 family of high-accuracy, 3.3V-compatible current sensors. Unlike the single-channel open-loop variants, the KMA series specifically integrates differential output amplifiers to improve noise immunity and signal integrity in electrically noisy environments typical of automotive and industrial power electronics.

Current Sensors Replacement Considerations

Direct substitutes within the same family include ACS724KMATR-30AB-T for higher current capacity and ACS724KMATR-65AB-T for even higher ratings. For lower current requirements, verify if ACS724LLCTR-20AU-T meets the bidirectional and package constraints, noting its different 8-SOIC form factor.