Diodes Incorporated

AH922 (Not Recommended for new design)

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The AH922 is a unipolar Hall-effect one-chip switch with digital output, solution for sense magnetic field. It is designed in mixed signal CMOS and chopper technology. This IC is quite suitable for use in automotive, industrial and consumer applications. The two sensors are suited for operation over extended temperature ranges. The AH922 Hall-effect switch is combined with a voltage regulator, Hall-voltage generator, chopper small-signal amplifier, Schmitt trigger and open-drain output.


  • Wide Operating Voltage Range
  • Chopper Stabilization
  • Extremely Low Switch Point Drift
  • Superior Temperature Stability
  • High Sensitivity Integrated Hall Sensor
  • Solid State Reliability
  • Robust EMC Capability


  • 5V/12V DC Brushless Motor/Fan
  • Solid State Switch
  • Speed Detection
  • Revolution Counting

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