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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
Interfaces 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

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.

Magnets cannot be ordered at ams directly. Please find a list of recommended 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
USBI&PBox Accessories USB I&P Box for I2C/SPI
RMH05-DK-XX Accessories Rotary Magnetic Holder


Type Description Language
Software Software V1.4.14 (USB I&P Box) English
Software Demo SW 0-1-8-0 English

Technical Documents

Type Description Language
Application Note Tape & Reel Packing Information English
Block Diagram AS5601 Block Diagram English
Datasheet Document version 1-07 English
Factsheet Smart & Contactless Encoder English
Factsheet 智能非接触式编码器 Chinese
Other Product Document AS5601ReferenceDesign Image English
Other Product Document RMH05-DK-XX Image English
Other Product Document USBI&PBox Image English
Other Product Document AS5601EvalKit Image English
Other Product Document AS5601AdapterBoard Image English
Product Change Notification PCN13-2018 (AS5601) English
User Guide Reference Design Manual English
User Guide Adapter board EK English
User Guide Standard board EK English
User Guide AS5xxx Rotary Magnet Holder English

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