This part is a kind of semiconductor called AS5045.

Function of this product has 12 BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER.

Manufacturers : austriamicrosystems AG

Image and pinout :

Some of the text within the PDF file :

AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER AS5045 12 BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER DATA SHEET 1 General Description 1.2 - Key Features Contactless high resolution rotational position encoding over a full turn of 360 degrees Two digital 12bit absolute outputs: - Serial interface and - Pulse width modulated (PWM) output User programmable zero position Failure detection mode for magnet placement monitoring and loss of power supply “red-yellow-green” indicators display placement of magnet in Z-axis Serial read-out of multiple interconnected AS5045 devices using Daisy Chain mode Tolerant to magnet misalignment and airgap variations Wide temperature range: - 40°C to + 125°C Small Pb-free package: SSOP 16 (5.3mm x 6.2mm) The AS5045 is a contactl [ ... ]

AS5045 PDF Datasheet Download