Angular Sensor for 3-Phase Brushless Motor Commutation



The MagAlpha MA120 magnetic sensor is an all-in-one solution designed to replace Hall switches for 3-phase block commutation in brushless DC motors. The MA120 detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder attached to the rotor. The data acquisition and processing is extremely fast, allowing for accurate angle measurement at speeds from 0 to 120,000 RPM.

The MA120 supports a wide magnetic field strength range, which helps relax mechanical tolerances and simplify system design.


  • UVW Signals for Block Commutation
  • 11-Bit Resolution Absolute Angle Encoder
  • 500kHz Refresh Rate
  • Ultra-Low Latency: 3µs
  • SPI Serial Interface
  • 3.3V, 7.7mA Supply
  • Available in a QFN-16 (3mmx3mm) Package

Additional Resources

Magnetic Design Tool

AppNote: Selecting the Right Magnet

AppNote: Sense BLDC Rotor Position

AppNote: Replace Optical Encoders


  • PackageQFN-16 (3x3)
  • 最小输入电压3
  • Vin (max) (V)3.6
  • fcutoff (Hz)740
  • Latency (µs)3
  • Isupply (mA)7.7
  • tstart-up (ms)3
  • GradeCatalog
  • Refresh Rate (kHz)500
  • Output FormatSPI, UVW
  • Resolution (bits)8
  • Sensor PositionEnd-of-Shaft
  • Temp Range (°C)-40 to +125
  • Magnetic Field (min) (mT)30

MagAlpha 通信套件

EVKT-MACOM是 MagAlpha磁位置传感器系列的通信工具。EVKT-MACOM可以与 MagAlpha测试板(TBMA)和评估套件(EVKT-KNOB)无缝连接和操作。该套件包含一个微控制器主板、使用相关电缆可适配不同的传感器子板。

¥ 526.50 + tax