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AS5601 Position Sensor

12-bit on-axis magnetic rotary position sensor with quadrature incremental and push-button output


  • Contactless angle measurement insensitive to dust and dirt
  • Simple user-programmable zero position and device configuration
  • Incremental quadrature output configurable from 8 up to 2048 pulses
  • Push-button output by detecting sudden air gap changes
  • High-resolution 12-bit digital absolute angle output over the I²C interface
  • Automatic entry into low power mode
  • Automatic magnet detection


  • Highest reliability and durability
  • Simple programming
  • Flexible choice of the number of A/B pulses per revolution
  • Contactless push-button functionality
  • High-resolution output signal
  • Low power consumption
  • Robust environmental tolerance

Product parameters

Resolution [bit] 12
Interface I²C
Output AB / I²C / PUSH
Max. Speed [rpm]
Overvoltage Protection No
Redundant No
Supply Voltage [V] 3-3.6 and 4.5-5.5
Temperature Range [°C] -40 to +125
Package SOIC-8
Automotive Qualified
Longevity Program January 2031

General description

The AS5601 is an easy-to-program magnetic rotary position sensor with incremental quadrature (A/B) and 12-bit digital output. This contactless system measures the absolute angle of a diametric magnetized on-axis magnet. Additionally, the PUSH output indicates fast airgap changes between the AS5601 and magnet which can be used to implement a contactless push-button function in which the knob can be pressed to move the magnet toward the AS5601. It is designed for contactless magnetic position sensor applications and its robust design eliminates the influence of any homogenous external stray magnetic fields. The industry-standard I²C interface supports simple user programming of non-volatile parameters without requiring a dedicated programmer. The AS5601 is also equipped with a smart low power mode feature to automatically reduce the power consumption. The device is available in a small form factor, compact 8-pin SOIC package.

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:

  • Contactless rotary knobs with push-button
  • Contactless magnetic position sensors
  • Jog wheels
  • Other angular position measurement solutions


Title Category Headline Buy
AS5601AdapterBoard Application Board Adapter Board for AS5601
AS5601EvalKit Application Board Evaluation Kit for AS5601
AS5601ReferenceDesign Application Board Reference Design for AS5601
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Technical documents

Type Description Language
Datasheet Document version 1-07 English
Application Note AN5000 Magnet Selection Guide v1-04 English
Application Note Tape & Reel Packing Information English
Application Note USB Interface & Programming Box English

Environmental documents

Type Description Language
Material Declaration Form MDF_191240008_AS5601-ASOM English
Material Declaration Form MDF_191240008_AS5601-ASOT English
RoHS Certificate RoHS Certificate AS5601 English


Type Description Language
Product Change Notification PCN13-2018 (AS5601) English

Other information

Type Description Language
Block Diagram AS5601 Block Diagram English
Factsheet 智能非接触式编码器 Chinese
Factsheet Smart & Contactless Encoder English
Image ASXXXX On-Axis SOIC8 Magnetic Field Lines
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