adam flow nemo
2/3/2007 4:18:18 PM

The differential Hall sensor IC detects the motion and position of ferromagnetic and permanent magnet structures by measuring the differential flux density of the magnetic field. Offset cancellation is achieved by advanced digital signal processing.
Immediately after power-on motion is detected (start-up mode). After a few transitions the sensor has finished self-calibration and switches to a high-accuracy mode (running mode). In running mode switching occurs at signal zero-crossing of the arithmetic mean of max and min value of magnetic differential signal.