Fully integrated magnetic position sensor for demanding automotive applications

Melexis has a next-generation monolithic magnetic sensor family, consisting of the MLX90371 and MLX90372, which offer robust absolute position sensing for automotive applications and includes powertrain actuators, pedals, and gear shifters. Both new devices consist of a Triaxis Hall magnetic front end, a DSP for advanced signal processing, an analogue to digital signal conditioner and an output stage driver. Due to the IMC, they are sensitive to magnetic flux in three planes (X, Y & Z). This helps the decoding of the absolute linear or rotary position of any moving magnet, enabling the design of non-contact position sensors. The MLX90371 provides analogue or PWM output while the MLX90372 offers SENT (SAE J2716 rev Apr 2016) or PWM output. The MLX90372 device includes an additional input pin that makes it possible to integrate other sensors allowing for the additional signal to be transmitted over the SENT output, reducing wire harness size and complexity. Commenting on the release, Nick Czarnecki, marketing manager – Position and Speed Sensors at Melexis said: “We are excited to be launching this next-generation family that builds upon our long history of magnetic sensing and patented Triaxis® technology. The automotive business is striving to meet new challenges, and the performance enhancements of our new offering will significantly contribute to key advancements. The ISO26262 ASIL-C capability of the MLX90372 and ASIL-B capability of the MLX90371 further ensures it is suitable for safety-critical automotive applications.”