2SA-10

Sentron's new magnetic angular sensor 2SA-10 detects the absolute angular position of a small magnet that is positioned above the device surface. The 2SA-10 is an integrated combination of a CMOS Hall circuit and a thin ferromagnetic disk. The CMOS circuit contains two pairs of Hall-elements for each of the two directions parallel with the chip surface X and Y. The ferromagnetic disk amplifies the external magnetic field and concentrates it on the Hall elements.

The 2SA-10 is ideally suited for rotary position sensing in harsh automotive and industrial environments. It produces two linear, ratio-metric output voltages proportional to the sine and the cosine function of the angle of the applied magnetic field parallel to the chip surface.

The circuit is fabricated using a standard CMOS process and the ferromagnetic disk is added in a simple post-processing step. The monolithic device incorporates Hall elements, offset cancellation circuitry, current source, chopper stabilized amplification circuitry, parameter programming capability.

By dynamic offset cancellation any offset voltage caused by temperature variations, packaging stress or others is strongly reduced. As a result, 2SA-10 has an extremely stable signal output, is immune to mechanical stress and is virtually immune to temperature cycling.