as5145b rotary position sensor

AS5145B: 12-bit Rotary Position Sensor With Digital Angle (Interface), PWM and ABI Output

The AS5145B is a contactless magnetic rotary position sensor for accurate angular measurement over a full turn of 360° and over an extended ambient temperature range of -40°C to 150°C. The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 0.0879° = 4096 positions per revolution via a serial bit stream and as a PWM signal. The incremental output (=ABI-interface) is preprogrammed for 12 bit = 4096 positions.

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Key Features

  • Contactless absolute angle position measurement and motion sensing
  • User programmable zero position
  • Multiple interfaces (SSI, ABI, PWM)
  • Immune to external magnetic stray fields


  • Valve Position Sensing
  • Transmission gearbox position sensor
  • Headlight position control
(click to enlarge)


Resolution12 bit
OutputDigital Angle (Interface) / ABI / PWM
Max speed [rpm]
Overvoltage protection [ ]
Supply voltage [V]3.3 or 5.0
Temperature range [°C]-40 to +150
Automotive qualifiedYes