GENERAL DESCRIPTION

The AD22157 is a mixed signal magnetic field transducer designed for applications where both speed sensing and direction sensing of a ferrous target wheel are required over a wide speed range.

The device operates from a 2 wire high compliance current loop and is suitable for continuous operation from -40C to 150C with supplies up to +20 Vdc. The sensor is designed to remain functional during voltage transients up to +27V.

FEATURES

Speed and direction from 0Hz to 2500Hz

Air gap diagnostics

2-wire current-loop operation

Wide Operating Temperature Range

Functional during temperature excursions to 190C

Reverse Supply Protected (-30V)

APPLICATIONS

Automotive

Wheel speed and direction sensing

Transmission speed sensing

Industrial

Incremental position sensing

Proximity switching