MultiDimension Technology Co., Ltd. AMR180º/360º Magnetic Rotary Encoder Sensor AMR3108A

Description The AMR3108A is a contactless, high-precision, and high-speed magnetic rotary encoder sensor, which integrated with anisotropic magnetoresistance (AMR) sensors and CMOS digital signal processing circuitry. The AMR3108A senses the single pole-pair magnet rotation above the chip by AMR sensors, collects the rotating magnetic field signal, transmits it to the digital processing unit, calculates the rotation angle and outputs 12-bit absolute position signals. The signal period of AMR3108A is 180° rotation angle. Using the reserved inverted switch interface, it can be extended to the detection of 360° rotation angle. AMR3108A outputs 12-bit absolute position signal through SPI communication protocol in a 180° rotation period. At the same time, it is able to output A/B phase programmable incremental position signal with 1 to 1024 pulse and programmable zero-point (Z phase) signal. AMR3108A also provides inverted UVW output, analog and PWM signals, with rotational speed up to 20,000 RPM. TSSOP16 Features and Benefits Anisotropic magnetoresistance (AMR) technology Contactless measurement Available in SPI,ABZ differential, UVW, Analog and PWM interfaces 12-bit absolute position output in SPI mode Programmable A/B interpolation factors from ×1 to ×1024 Programmable zero position Programmable inverted UVW output resolution in 1 to 16 pole-pair Angular repeatability < ±0.1° Programmable Z pulse width in 1LSB/2LSB/4LSB/90° Speeds up to 20,000 RPM Programmable analog clamping voltage and PWM frequency Adaptive supply voltage: 3.3 V to 5 V RoHS and REACH compliant Applications Contactless angular position measurement Brushless motor position sensing Rotary speed sensing Stepper motor