-6-

REV. PrA

A typical automotive application is shown above. The digital output signal is developed across a 75

ohm resistor. The power supply to the device is conditioned in an ECU to limit “load dump” pulses to

27v.

Package Rear View

Wheel Front View

Pin 1

Magnet

Left: Pin 1 to Pin 5

Right: Pin 5 to Pin 1

Front of AD22157

faces the wheel

Magnet placed

against the back side

of the AD22157

Figure 7. Wheel Direction Diagram

Figure 6. Typical Connection in a Wheel Speed Sensing Application

Cecu

75

Ω

27V

Vbat_high

Vbat_low

(Battery Voltage)

4.7nF

Vlow

Vhigh

NC

ECU

Sensor Circuit

Supply to additional sensors

NC

NC

AD22157

PRELIMINARY TECHNICAL DATA