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AS5045B Rotary Position Sensor

12-bit Rotary Position Sensor with Digital Angle (interface) and PWM and ABI Output

The AS5045B is a 12-bit rotary position sensor (previously known as encoder) for absolute angular measurement and with an incremental output over a full turn of 360° based on contactless magnetic sensor technology. This device fits perfectly for on-axis applications where a simple 2-pole magnet rotates above or below the sensor IC and the zero position can be programmed into the device. The absolute magnet angular position is measured with a resolution of 12 bit = 4096 positions per revolution and it is provided as a digital value on the serial interface (SSI) and on the PWM output signal.

AS5045B Rotary Sensor Block Diagram

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

Key Benefits

  • Highest reliability and durability in harsh environments
  • Great flexibility during assembly
  • One device for different applications
  • Lower material cost (no magnetic shielding needed)

Applications

  • Motor speed and motion sensor
  • Automatic Doors
  • Replacement of optical magnetic position sensors
  • Robotics

AS5045B Product Facts

Resolution 12-bit
Interfaces SSI
Output Digital Angle (Interface) / ABI / PWM
Max speed [rpm]
Overvoltage protection [ ]
Redundant
Supply voltage [V] 3.3 or 5.0
Temperature range [°C] -40 to +125
Package SSOP-16
Automotive qualified