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AS5245 Rotary Sensor

Redundant 12-bit rotary position sensor with digital angle (interface) and ABI output


  • 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

Product parameters

Resolution [bit] 12
Interfaces SSI
Output Digital angle (interface) / ABI / PWM
Max. Speed [rpm]
Overvoltage Protection
Redundant Yes
Supply Voltage [V] 3.3 or 5.0
Temperature Range [°C] -40 to +150
Package QFN-32
Automotive Qualified Yes

General Description

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.

Magnets cannot be ordered at ams directly. Please find a list of recommended magnet suppliers.

This product suits for the following applications:

  • Steering wheel position sensing
  • Headlight position control
  • Valve position sensing


Title Category Headline Buy
AS5245AdapterBoard Application Board Adapter Board for AS5245
AS5245DemoKit Application Board Demo Kit for AS5245
RMH05-DK-XX Accessories Rotary Magnetic Holder
AS5245-PB Application Board Programming Board for AS5245


Name Type Description Language Software Firmware V1.5.4.0 (AS5000Programmer) English

Technical Documents

Name Type Description Version Language
PositionSensors_AN000304_1-00.pdf Application Note Tape & Reel Packing Information 1-00 English
AS5140_45_5245_AN000102_1-00.pdf Application Note PPTRIM programming 1-00 English
AS5245_BD000229_1-00.png Block Diagram AS5245 Block Diagram 1-00 English
AS5245_DS000337_1-00.pdf Datasheet Document version 1-08 1-00 English
AS5000Programmer_PD000456_1-00.jpg Other Product Document AS5000 Programmer Image 1-00 English
AS5245_PD000233_1-00.png Other Product Document AS5245AdapterBoard Image 1-00 English
AS5245_PD000384_1-00.png Other Product Document AS5245DemoKit Image 1-00 English
AS5xxx_UG000386_1-00.pdf User Guide AS5xxx Rotary Magnet Holder 1-00 English
AS5245_UG000117_1-00.pdf User Guide Adapter board 1-00 English
AS5245_UG000116_1-00.pdf User Guide Demo board 1-00 English

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