Allegro MicroSystems Inc. High-Accuracy, 3.3V Isolated Current Sensor with Stray Field Rejection ACS725LLCTR-40AB-T

The ACS725LLCTR-40AB-T is a high-accuracy, automotive-grade, galvanically isolated current sensor IC designed for AC and DC current sensing applications. It features a differential Hall sensing mechanism that effectively rejects common-mode fields, enhancing measurement accuracy in noisy environments. The device operates on a single 3.3V supply and provides an analog output voltage that is proportional to the sensed current, with a typical sensitivity of 33 mV/A. This current sensor has a low primary conductor resistance of 1.2 m,Ѷ, which minimizes power loss and allows for high inrush current withstand capability. The integrated shield significantly reduces capacitive coupling, thereby suppressing output noise from high dV/dt transients. The sensor supports a high bandwidth of 120 kHz, making it suitable for fast response applications, while a filter pin allows users to optimize the output for improved resolution at lower bandwidths. The ACS725LLCTR-40AB-T is packaged in a compact SOIC8 format, making it ideal for space-constrained designs. It is AEC-Q100 qualified, ensuring reliability in automotive applications, and is suitable for various uses, including motor control, load detection, and overcurrent protection.