The MA980 from Monolithic Power Systems is a miniature angle position sensor based on a differential magnetic field measurement technology which is ideal for sensors operating with a simple, low-cost target magnet.
The sensor detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder mounted at the end of a rotating shaft. The sensor’s differential method of magnetic flux measurement eliminates the effect of parasitic magnetic fields induced by high-voltage cabling, electric motors, and other sources.
The MA980 is suitable for use in battery-powered applications that require low average power consumption thanks to its ability to perform duty cycling. The timing of the power cycles can be controlled by an on-chip clock or by an external controller. Flags are available for detecting a definable amount of angle change.
On-chip non-volatile memory provides storage for configuration parameters, including the reference zero angle position, the power cycling parameters, the filter window affecting the output resolution, and magnetic field detection thresholds.
