Angular Sensor for 3-Phase Brushless Motor Commutation

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Product Description

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.

Product Features

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


  • PackageQFN-16 (3x3)
  • Vin (min) (V)3
  • Vin (max) (V)3.6
  • Latency (µs)3
  • tstart-up (ms)2
  • GradeCatalog
  • Refresh Rate (kHz)500
  • Output FormatUVW
  • Resolution (bits)8
  • Sensor PositionEnd-of-Shaft
  • Temp Range (°C)-40 to +125
  • Magnetic Field Range (mT)50 to 200