FP212D250-22 Datasheet, PDF (3/5 Pages) Siemens Semiconductor Group – Differential Magnetoresistive Sensor

FP 212 D 250-22
1. Digital revolution counting
For digital revolution counting, the sensor should be actuated by a magnetically soft iron
toothed wheel. The tooth spacing should correspond to about twice the magneto resistor
intercenter spacing i.e. 2×1.6 mm (see Fig. 1).
The two resistors of the sensor are supplemented by two additional resistors in order to
obtain the sensor output voltage as a bridge voltage V_OUT. The output voltage V_OUT
without excitation then is 0 V when the offset is compensated.
Fig. 1
Schematic representation of a toothed wheel actuating an FP 212 D 250-22
Fig. 2
Measuring circuit and output voltage V_OUT waveform
Semiconductor Group
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