ams AS5245 Rotary Sensor


The AS5245 is a redundant, contactless magnetic rotary position sensor for accurate angular measurement over a full turn of 360° and over an extended ambient temperature range of -40°C to 150°C. The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 0.0879° = 4096 positions per revolution via a serial bit stream and as a PWM signal.

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  • Contactless high resolution rotational position encoding over a full turn of 360º
  • Two digital 12-bit absolute outputs
  • Quadrature A/B (10- or 12-bit) and Index output signal
  • User programmable zero position
  • Failure detection mode for magnet placement monitoring and loss of power supply
  • “Red-Yellow-Green” indicators display placement of magnet in Z-axis
  • Tolerant to magnet misalignment and air gap variations
  • Wide temperature range: - 40ºC to 150ºC
  • Unique Chip Identifier
  • Fully automotive qualified to AEC-Q100, grade 0
  • Small package: QFN 32 LD (7x7)


  • No mechanical wear
  • High resolution absolute position sensing
  • Easy to use for motor control
  • Adjustable zero position
  • Tolerant to magnet misalignment
  • Usable for high speed applications
  • Tolerant to airgap variations
  • Operates up to 150°C ambient temperature
  • Supports daisy chain application
  • Fitting to automotive applications
  • Two sensors in one package

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