|ams' AS5134 is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 360°. 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 2-pole magnet rotating over the center of the chip is required. The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 8.5-bit = 360 positions per revolution. This digital data is available as a serial bit stream and as a PWM signal.
In addition to the angle information, the strength of the magnetic field is also available as a 6-bit code. Data transmission can be configured for 1-wire (PWM), 2-wires (DCLK, DIO), or 3-wires (DCLK, DIO, CS).
A software programmable (OTP) zero position simplifies assembly, as the zero position of the magnet does not need to be mechanically aligned. A power down mode together with fast startup- and measurement-cycles allows for very low average power consumption.