AS5132

AS5132 360 Step (8.5 bit) Programmable High Speed Magnetic Rotary Encoder 1 General Description The AS5132 is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 360 degrees. It is a systemon-chip, combining integrated Hall elements, analog frontend 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 8.5 bit = 360 positions per revolution. This digital data is available as serial output over the interface and as a pulse width modulated (PWM) signal. An additional U,V,W output can be used for a block commutation for a brushless DC motor. An incremental signal is available as an option. In addition to the angle information, the strength of the magnetic field is also available as a 5-bit code. A software programmable (OTP) zero position simplifies assembly as the zero position. The magnet does not need to be mechanically aligned. 2 Key Features 360º contactless angular position sensing Figure 1. AS5132 Block Diagram Two digital absolute outputs (8.5 bit): - Serial interface - PWM output Incremental output with adjustable number of pulses BLDC Output UVW, selectable for 1,2,3,4,5,6 pole pairs Supports external PWM clock mode Static and dynamic pre-commutation feature User programmable zero position and sensitivity ...