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AS5171 High Resolution Position Sensor

High-resolution on-axis magnetic angular position sensor


  • 12-bit resolution @90° minimum arc
  • Low output noise, low inherent INL
  • Magnetic stray field immunity
  • Functional safety, diagnostics, dual redundant chip version
  • AEC-Q100 Grade 0 qualified


  • Resolve small angular excursion with high accuracy
  • Accurate angle measurement
  • Higher durability and lower system costs (no shielding needed)
  • Enabler for safety critical applications
  • SiP package (sensor + decoupling capacitors for ESD/EMC)

Product parameters

Resolution [bit] 14 or 12
Output Analog ratiometric or PWM
Max. Speed [rpm]
Overvoltage Protection Yes
Supply Voltage [V] 5.0
Temperature Range [°C] -40 to +150
Package SiP (system in package)
Automotive Qualified
Longevity Program January 2031

General description

The AS5171 is a high-resolution angular position sensor for precise absolute angle measurement. The AS5171 is available with an analog output interface (AS5171A) or a digital output interface (AS5171B).
The AS5171A and AS5171B are available in a SIP package (system in package). The package has integrated the AS5171 sensor die together with the decoupling capacitors necessary to pass system level ESD and EMC requirements. No additional components and PCB on the sensor side is needed. The product is defined as SEooC (Safety Element out of Context) according to ISO26262.

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:

  • Brake and gas pedals
  • Throttle valve and tumble flaps
  • Steering angle sensors
  • Chassis ride
  • EGR
  • Fuel level measurement systems
  • 2/4WD switch
  • Contactless potentiometers


Title Category Headline Buy
SD4Y-PP Accessories Production Programmer SD4Y
AS5xxx-EK-USB-PB Accessories Programming Board for AS5xxx


Type Description Language
Evaluation Software AS517x - Software for Evaluation Board (UART Programmer) EN

Technical documents

Type Description Language
Datasheet Document version 1-06 English
Application Note AN5000 Magnet Selection Guide v1-04 English
Application Note Tape & Reel Packing Information English

Environmental documents

Type Description Language
Material Declaration Form MDF_501220057_AS5171C-HSIT English
Material Declaration Form MDF_501220047_AS5171B-HSIT English
Material Declaration Form MDF_501220041_AS5171A-HSIT English
RoHS Certificate RoHS_Certificate_AS5171 English


Type Description Language
Product Change Notification PCN38-2018 (AS50xx, AS51xx, AS52xx, AS54xx, AS8xxx) English
Product Change Notification PCN32-2022 Introduction of new octal site test platform (DMX) (issued 05-April-22) English

Other information

Type Description Language
Block Diagram AS5171 Block Diagram English
Factsheet Position Sensors Family Overview English
Image SiP-Package_A4 Magnetic Field Lines
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