ACS723LLCTR-40AU-T
Overview
The ACS723LLCTR-40AU-T is a high-accuracy, galvanically isolated Hall-effect current sensor IC designed for unidirectional DC sensing up to 40A. It features an integrated 0.65 mOhm primary conductor and a ratiometric analog output that scales with the 5V supply voltage. The device includes an internal shield to provide high dV/dt transient immunity and patented digital temperature compensation for stable operation across its temperature range.
Why Choose This Part
This sensor provides high-side sensing capability with 2.4kV RMS galvanic isolation, eliminating the need for expensive opto-isolators or high-side differential amplifiers. Its integrated shield minimizes output noise caused by fast voltage transients, while the pin-selectable bandwidth allows engineers to optimize the tradeoff between response time (5us) and noise performance.
Applications
Key Specifications
Getting Started
To evaluate this sensor, provide a stable 4.5V to 5.5V supply and connect the primary current path to the SOIC-8 high-current pins. Use the BW pin to select between 20kHz or 80kHz filtering depending on your application noise requirements. The analog VOUT pin can be interfaced directly to a 5V microcontroller ADC, where 0A corresponds to 10% VCC and 40A corresponds to 90% VCC.
