as5601 rotary position sensor

AS5601: 12-Bit On-Axis Magnetic Rotary Position Sensor With Quadrature Incremental and Push-Button Output

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.

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Key Features

  • Contactless angle measurement
  • 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


  • Rotary knobs
  • Contactless magnetic position sensors
  • Jog wheels
  • Angular position measurement solutions
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OutputAB / I2C / PUSH
Max speed [rpm]
Overvoltage protection [ ]no
Supply voltage [V]3-3.6 and 4.5-5.5
Temperature range [°C]-40 to +125
Automotive qualified