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AS5140H Rotary Sensor

10-bit rotary position sensor with digital angle (interface) output, ABI and PWM output


  • Contactless high resolution rotational position encoding over a full turn of 360º
  • Two digital 10-bit absolute outputs: Serial interface and Pulse width modulated (PWM) output
  • Three incremental output modes: Quadrature A/B and Index output signal, Step / Direction and Index output signal, 3-phase commutation for brushless DC motors
  • User programmable zero / index position


  • High resolution absolute position sensing
  • Easy to use for motor control
  • Adjustable zero position
  • No mechanical wear

Product parameters

Resolution [bit] 10
Interface SSI
Output Digital angle (interface) / ABI / PWM
Max. Speed [rpm] 10000
Overvoltage Protection
Supply Voltage [V] 3.3 or 5.0
Temperature Range [°C] -40 to +150
Package SSOP-16
Automotive Qualified Yes
Longevity Program

General description

The AS5140H is a 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 0.35° = 1024 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
AS5140HAdapterBoard Application Board Adapter Board for AS5140H
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Technical documents

Type Description Language
Datasheet Document version 1-09 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_175940038_AS5140H-ASST English
Material Declaration Form MDF_175940038_AS5140H-ASSM English
Material Declaration Form MDF_175940038_AS5140H English
RoHS Certificate RoHS Certificate AS5140H English


Type Description Language
Product Change Notification PCN38-2018 (AS50xx, AS51xx, AS52xx, AS54xx, AS8xxx) English

Other information

Type Description Language
Block Diagram AS5140H Block Diagram English
Image ASXXXX On-Axis SSOP16 Magnetic Field Lines
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