ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS5601 Position Sensor

12-bit On-Axis Magnetic Rotary Position Sensor with quadrature incremental and push-button output

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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.

Key Features

  • 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 airgap changes
  • High-resolution 12-bit digital absolute angle output over the I²C interface
  • Automatic entry into low-power mode
  • Automatic magnet detection

Key Benefits

  • 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 Facts

Resolution 12 bit
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

Additional Information


The AS5601 is ideally suited for contactless rotary knobs with push-button, contactless magnetic position sensors, Jog wheels and other angular position measurement solutions.


Factsheet AS5601 - Ideal for contactless push-button function