Datasheet

HMC1501/1512
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Using the HMC1512 bridge A signal output plotted versus theta, the figure below depicts the two-cycle waveform.
As you can see above, the most linear range for this sensor bridge is in the 45° range about the –180, -90, 0, 90, and
180 degree points. Of these the 0 and 180 points have a positive slope, and the 90 points have a negative slope. These
slopes can be taken to full advantage for angular and linear positioning applications.
Basic Position Sensing
For simple magnetic position sensing, the HMC1501 sensor can used to detect the relative motion of a nearby magnet in
linear or angular displacement.
With the orientation of the stationary HMC1501, the magnet position can translate to 45° and stay within a linear slope of
V versus for position sensing. Given a typical supply voltage of 5 volts (Vs = +5Vdc), the HMC1501 will provide about a
120 millivolt swing ( 60 millivolts) on 2.5 volt bias voltage. The reason for the 2.5 volts is that with the Wheatstone bridge
provides a differential voltage output with a bias voltage from the 5 volt supply voltage. The figures show the mechanical
orientation and the electrical transfer function.