Automotive-Grade Magnetic Position Sensors

October 13, 2017

Jennifer Shuttleworth

ams’ (Premstaetten, Austria) AS5172A/B magnetic position sensors feature a two-wire PSI5 interface for fast and secure transmission of their precise rotary position measurements. The new AS5172A and AS5172B system-on-chip (SoC) devices are 0° to 360° contactless rotary magnetic position sensors that provide absolute angle measurements in high 14-bit resolution. The sensors have been developed as SEooC (safety element out of context) devices according to automotive safety standard ISO26262 and feature extensive on-chip self-diagnostic systems. The company claims this makes the AS5172A/B suitable for safety-critical automotive applications, enabling a vehicle system to meet the highest ASIL safety level requirements. In addition, the PSI5 interface in the AS5172A/B parts conforms to the latest standards, as set by the PSI5 specification versions 1.3 and 2.1. The AEC-Q100 qualified devices support many automotive remote position sensing applications including brake and gas pedal position sensing, throttle valve and tumble flaps, steering angle sensors, chassis ride height sensors, exhaust gas recirculation (EGR) valves and fuel-level measurement systems.