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AM512B - 9 bit Rotary Magnetic Sensor IC

AM512B - 9 bit Rotary Magnetic Sensor IC

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The IC senses the angular position of a permanent magnet placed above the chip. The permanent magnet must be diametrically polarized and of cylindrical shape.


The AM512B uses Hall sensor technology to detect the magnetic flux density distribution at the surface of the silicon. Hall sensors are placed in a circular array around the center of the IC and deliver a voltage representation of magnetic field distribution.


The sine and cosine voltage outputs from the sensor array vary with magnet position. The sine and cosine signals are then converted to absolute angle position with a fast nine bit flash interpolator.


The absolute angle position value from the interpolator is output through a parallel binary interface or a serial SSI interface or a linear voltage output. The relative changes of angle position are output through incremental A QUAD B encoder signals. The resolution of incremental output is 512 counts per turn.


In case parallel output and 9 bit resolution are not your main requirements, we recommend that you choose a different RLS chip – parallel output with 7 bit resolution is available on AM256. And if parallel output is not your main requirement, we recommend using either AM4096 or AM8192B, depending on required resolution.


  • Contactless angular position encoding over 360°
  • Ideal for harsh environments due to magnetic sensing 
  • Complete system-on-chip solution
  • 9 bit absolute encoder
  • Factory optimized linearity
  • High rotational speed up to 30,000 rpm
  • 5 V power supply
  • Low power consumption 20 mA typical.
  • Extended operating temperature range (–40 °C to +125 °C)
  • SMD package LQFP44
  • RoHS compliant (lead free)
Lead time up to: 15 working days