A19351: High-Performance GMR AK Protocol Wheel Speed and Direction Sensor IC

The A19351 is a giant magnetoresistance (GMR) magnetic sensor integrated circuit (IC) designed to measure ring magnets, especially for automotive wheel speed and direction applications. The IC fully integrates sensing elements, voltage regulators, analog-to-digital converters, and a digital controller to adaptively measure the magnetic signal and provide a robust, low-jitter AK Protocol output over the two-wire interface.

The A19351 features Allegro’s SolidSpeed Digital Architecture, the latest mixed-signal speed sensor architecture for highly adaptive performance that provides the widest dynamic range of operating air gaps with temperature drift compensation. Flexibility is passed to the system integrator, enabling looser mechanical constraints with a wide operating air gap.

The GMR based IC was developed in accordance with ISO 26262 as a hardware safety element out of context with ASIL B(D) capability (pending assessment) for use in automotive safety-related systems when integrated in the manner prescribed in the applicable safety manual and datasheet.