Motor Commutation Angle Sensor with UVW Multi-Pole Pair Emulation

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Product Description

The MagAlpha MA102 magnetic sensor is an all-in-one solution designed to replace Hall switches for commutation in brushless DC motors and to provide absolute angle position. Absolute position is provided in the form of an 8-bit direct digital angle on the SPI interface. 12-bit resolution UVW commutation signals are provided with emulation for 1 to 8 pole pair rotors.

The MA102 detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder on a rotating shaft. Fast data acquisition and processing provide accurate angle measurement at speeds from 0 to 60,000 rpm.

The MA102 supports a wide range of magnetic field strengths and spatial configurations. Both end-of-shaft and off-axis (side-shaft mounting) configurations are supported.

Product Features

  • 12-Bit Repeatability of UVW Outputs
  • Contactless Sensing for Long Life
  • SPI Serial Interface for 8-Bit Angle Readout and Chip Configuration
  • UVW Signals for Block Commutation with 1 to 8 Pole Pair Emulation Using a 2-Pole Magnet, Complement /UVW Signals Provided for Differential Signaling
  • Programmable Magnetic Field Strength Detection for Diagnostic Checks
  • Linearization for Side-Shaft Mounting
  • 3.3V, 12mA Supply
  • -40°C to +125°C Operating Temperature
  • Available in a QFN-16 (3mmx3mm) Package


  • PackageQFN-16 (3x3)
  • Vin (min) (V)3
  • Vin (max) (V)3.6
  • Latency (µs)10
  • Isupply (mA)11.7
  • tstart-up (ms)12
  • GradeCatalog
  • Refresh Rate (kHz)980
  • Output FormatUVW
  • Resolution (bits)12
  • Sensor PositionEnd-of-Shaft, Side-Shaft
  • Temp Range (°C)-40 to +125
  • Side-Shaft LinearizationYes
  • Magnetic Field DetectionYes
  • ABZ Resolution (bit)10
  • Magnetic Field Range (mT)30-150