Allegro introduces a new Hall-effect current sensor that sets the industry benchmark for accuracy, the ACS37017. With this device, Allegro completes a strategic expansion of its high-performance portfolio that now includes solutions for three critical challenges in modern power electronics: speed (ACS37100), power density (ACS37200) and accuracy (ACS37017).
“Our philosophy is simple: we want to give engineers the right tool for the job,” said Matt Hein, Business Line Director of Current Sensors at Allegro MicroSystems. “We don’t force a compromise. If you need to catch a fault in 50 nanoseconds, we have the award-winning ACS37100 XtremeSense TMR current sensor. If you need to sense high power in a tiny footprint, we have the high-density ACS37200. And now, with the ACS37017, if your priority is absolute accuracy, we have the definitive solution. Across the board, we are delivering ‘Sensing Leadership’ in every metric that matters.”
As power converters in AI data centres, electrified vehicles (xEVs) and clean energy systems push for higher efficiency, one size doesn’t fit all. Designers seek specialised solutions tailored to their specific performance objectives. The factory-calibrated ACS37017 answers the call for accuracy, integrating high-voltage isolation with an advanced sensing architecture to achieve an industry-leading 0.55% typical sensitivity error over lifetime and temperature. This level of accuracy delivers the high-fidelity feedback required to stabilize high-voltage power conversion systems.
Conventional sensors often suffer from “drift,” a degradation of accuracy as temperatures change or the component ages. The ACS37017 offers highly stable performance thanks to Allegro’s proprietary compensation architecture. This technology actively maintains precise measurements, ensuring that control loops remain stable and efficient over the entire life of the vehicle or power supply.
Beyond raw accuracy, the ACS37017 simplifies system architecture by integrating a stable, non-ratiometric voltage reference that eliminates the need for external precision voltage reference components on the PCB. This not only reduces the bill of materials (BOM) and saves board space but also removes a major source of system-level noise and error, allowing the sensor to deliver a pristine signal directly to the microcontroller.
