AS5030

AS5030 8-Bit Programmable High Speed Magnetic Rotary Encoder 1 General Description The AS5030 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 two-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 bit = 256 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 (CLK, DIO) or 3-wires (CLK, 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 and makes the AS5030 also suitable for battery operated equipment. Figure 1. AS5030 Block Diagram 2 Key Features 360° contactless angular position encoding Two digital 8-bit absolute outputs: - Serial interface - Pulse width modulated (PWM) output User programmable zero position Direct measurement of magnetic field strength allows exact determination of vertical magnet dist...