Contactless Turning Knob Sensor

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Product Description

The MagAlpha MA750 is a robust, contactless, angle encoder suitable for control buttons and knobs. The IC detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder attached to the rotor. The output is digital (SPI) or pulse-width modulation (PWM). For usual potentiometer replacement, the PWM signal can be filtered to obtain an analog signal.

Product Features

  • 8 bit digital and 12 bit PWM output
  • 500 kHz refresh rate
  • 7.5 mA supply current
  • Serial interface for data readout and settings


  • PackageQFN-16 (3x3)
  • Vin (min) (V)3
  • Vin (max) (V)3.6
  • Latency (µs)3
  • tstart-up (ms)4
  • GradeCatalog
  • Refresh Rate (kHz)500
  • Output FormatPWM, SPI
  • Resolution (bits)8 to 12
  • Sensor PositionEnd-of-Shaft
  • Temp Range (°C)-40 to +125
  • Magnetic Field Range (mT)30 to 150