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: 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)
  • Vin (min) (V)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 Communication Kit to Connect to Sensor Test Boards (TMBA) and Rotary Knob Kit, Requires Macom App Software

The EVKT-MACOM is a communication kit for the MagAlpha magnetic position sensor family test boards (TBMA) and Rotary Knob kit (EVKT-KNOB). The kit contains a mircocontroller, motherboard, a collection of daughter boards adapted to different sensor boards, and the related cables.

It requires the communications kit (EVKT-MACOM) and the Macom App Software (see below) to evaluate MagAlpha functionality and performance with your set-up, such as noise level, refresh rate, power-up time, and magnetic field dependence.

$75.00 + tax

Reference Materials

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.