This part is a kind of semiconductor called AS5045B.

Function of this product has 12-Bit Programmable Magnetic Position Sensor.

Manufacturers : ams

Image and pinout :

Some of the text within the PDF file :

AS5045B 12-Bit Programmable Magnetic Position Sensor 1 General Description The AS5045B is a contact less magnetic position sensor for accurate angular measurement over a full turn of 360 degrees. It is a system-on-chip, combining integrated Hall elements, analog front end and digital signal processing in a single device. To measure the angle, only a simple two-pole magnet, rotating over the center of the chip, is required. The magnet can be placed above or below the IC. The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 0.0879º = 4096 positions per revolution. This digital data is available as a serial bit stream and as a PWM signal. An internal voltage regulator allows the AS5045B to operate at either 3.3V or 5V supplies. 2 [ ... ]

AS5045B PDF Datasheet Download