ZMT31
ANGLE SENSOR
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
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Measures the magnetic field hrot (> 50kA/m)
generated by a permanent magnet which rotates
over the sensor
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Magnetic field hrot parallel to the chip surface causes
a sinusoidal output signal
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Package : SM-8 (available on 12mm tape)
PINOUT DIAGRAM
1
2
3
4
8
7
6
5
APPLICATION
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Contactless counting of the revolutions of a rotating
magnet (watermeters etc.)
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Contactless angular measurement
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Automotive (pedal position etc.)
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Contactless rotary switches
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Contactless potentiometer
Pin connection:
Bridge1:
pin 1: -V
O
pin 5: +V
O
pin 8: -V
B
(GND) pin 4: +V
B
Bridge 2:
pin 2: -V
O
pin 6: +V
O
pin 7: -V
B
(GND) pin 3: +V
B
V
O
- output voltage V
B
- supply voltage
ORDERING INFORMATION
DEVICE
ZMT31TA
ZMT31TC
REEL
SIZE
7
13
TAPE
WIDTH
12mm
12mm
QUANTITY
PER REEL
1000
4000
DE VICE MARKING
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ZMT31
ISSUE 2 - FEBRUARY 2002
1