Magnetic position sensor enables next-generation ADAS

May 20, 2021 // By Jean-Pierre Joosting
Magnetic position sensor enables next-generation ADAS
A31315 magnetic position sensor delivers the accuracy and performance needed to meet stringent ASIL-D requirements of safety-critical automotive applications.

Allegro MicroSystems has released the A31315 sensor, the latest member of the 3DMAG™ family of rotary and linear magnetic position sensor ICs for automotive and industrial applications. 3DMAG sensors combine Allegro’s proven planar and vertical Hall-effect technologies to measure magnetic field components along three axes (X, Y, Z), enabling true 3D sensing capabilities with a wide magnetic dynamic range without saturation.

Continued advancements in advanced driver assistance systems (ADAS) and autonomous driving systems present new performance and functional safety challenges for system integrators. The A31315 sensor addresses these challenges by delivering the measurement accuracy and performance necessary to meet the stringent requirements of safety-critical automotive applications including steering, braking, transmission and throttle systems.

The sensors’ flexible 3D Hall front end and configurable signal processing architecture enable highly accurate, absolute linear position and rotary position measurements up to 360° while easing system integration challenges by providing greater freedom in sensor placement. Existing 3DMAG devices, such as the ALS31300 and ALS31313 sensors, also support 3D magnetometer applications in which all three magnetic components (BX, BY, BZ) are required to track complex magnetic movements.

“Building on Allegro’s decades of automotive magnetic sensing innovation, the 3DMAG family expands our range of industry-leading position sensing solutions to include virtually any moving magnet system while offering the performance and functional safety capabilities required to enable the next generation of ADAS solutions,” said Scott Milne, Business Unit Director for Magnetic Position Sensors at Allegro MicroSystems. “ADAS is a key growth engine for the automotive industry, and our early position in this market—combined with a robust new product pipeline—provides our customers with the sensing solutions they need to accelerate the adoption of ADAS features in smart, autonomous vehicles.”


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