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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
Interface 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
Longevity Program

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
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

Environmental documents

Type Description Language
Material Declaration Form MDF_177710115_AS5245-HMFP English
Material Declaration Form MDF_177710115_AS5245-HMFM English
RoHS Certificate RoHS AS5245 English


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

Other information

Type Description Language
Block Diagram AS5245 Block Diagram English
Image AS5000 Programmer Image English
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