DESCRIPTION

The ZMT31 allows the contactless counting of thr revolutions of a rotating magnet

which is mounted on the axis of a wheel. Zero output voltages of the Wheatstones

bridges are used as trigger signals. The sense of rotation of the wheel is taken into

account by comparing the signal outputs of both Wheatstone bridges which are

proportional to sin2( ) or sin2( +45 ). the angle can be determined by evaluating

these signals. Alternatively it is possible to use the voltage signals of four half

bridges which are trimmed on Vb/2.

FEATURES

· Measures the magnetic field hrot (> 50kA/m)

generated by a permanent magnet which rotates

over the sensor

· Magnetic field hrot parallel to the chip surface causes

a sinusoidal output signal

· Package : SM-8 (available on 12mm tape)

APPLICATION

· Contactless counting of the revolutions of a rotating

magnet (watermeters etc.)

· Contactless angular measurement

· Automotive (pedal position etc.)

· Contactless rotary switches

· Contactless potentiometer

DE VICE MARKING

· ZMT31

ZMT31

ISSUE 2 - FEBRUARY 2002

1

ANGLE SENSOR

1

4

2

3

8

5

7

6

PINOUT DIAGRAM

Pin connection:

DEVICE

REEL

SIZE

TAPE

WIDTH

QUANTITY

PER REEL

ZMT31TA

7

12mm

1000

ZMT31TC

13

12mm

4000

ORDERING INFORMATION