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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.

With two decades of magnetic sensor system know-how, we have broad experience in selecting the most suitable magnets. ams experts recommend the following 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

Technical Documents

Type Description Language
Datasheet Document version 1-08 English
Application Note PPTRIM programming English
Application Note AN5000 Magnet Selection Guide v1-04 English
Application Note Tape & Reel Packing Information English
User Guide Programming tool English


Type Description Language
Product Change Notification PCN38-2018 (AS50xx, AS51xx, AS52xx, AS54xx, AS8xxx) English
Product Change Notification PCN01-2014 (AS5215, AS5245, AS5261, AS5262, AS5263, AS8223, AS8506, AS8515) English

Other Information

Type Description Language
Block Diagram AS5245 Block Diagram English
Other Product Document AS5245DemoKit Image English
Other Product Document AS5245AdapterBoard Image English
Other Product Document AS5000 Programmer Image English

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