Datasheet Summary
PRELIMINARY TECHNICAL DATA
Wheel Speed Sensor For ABS Systems
Preliminary Technical Data
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
Hall Array In Amps
Functional Block Diagram
Vhigh
Tracker 1 PWM
7mA 7mA
Tracker 2
Vlow
GENERAL DESCRIPTION The AD22157 is a mixed signal magnetic field transducer designed for applications where both speed sensing and direction...