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Diodes Incorporated


Diodes Incorporated AH1390 Hall Effect Switch

Featuring dual outputs for portable and battery-powered consumer equipment

The DIODES™ AH1390 by Diodes Incorporated is a miniature micropower magnetic Unipolar Hall effect switch IC with dual outputs specifically designed for portable and battery powered consumer equipment to home appliances and industrial applications.

To support battery powered equipment and low voltage microcontrollers, the AH1390 can operate over the supply range of 1.6V to 3.6V and uses a sleep function to give an average supply current of only 1.3μA at 1.85V. The AH1390 has a 2kV ESD rating on the supply and output pins. To minimize PCB space, the AH1390 is packaged in small low profile X2-DFN1410-4.

A North pole of sufficient strength will turn Output1 on and a South pole of sufficient strength will turn on Output2. The Output1 is turned on (pulled low) when the magnetic flux density (B), perpendicular to the part marking surface, falls below North field operate point BOPN (-17G typical). The Output1 is held low until B rises above the North field release point BRPN (-11G typical). Similarly, the Output2 will operate (pulled low) when B to the part marking surface rises above South field operate point BOPS (17G typical) and is held low until B falls below the South field release point BRPS (11G typical).


  • Two monolithic unipolar Hall switches
  • Operation with a north pole (output1) to part marking surface
  • Operation with a south pole (output2) to part marking surface
  • Supply voltage of 1.6V to 3.6V
  • Micro power operation
  • Dual outputs for independent pole detection for design flexibility
  • Internal pull-up and pull-down capability
  • Chopper stabilized design
  • Superior temperature stability
  • Extremely low switch-point drift
  • Insensitive to physical stress
  • Good RF noise immunity
  • Operating temperature range: -40C to +85C
  • 2kV ESD on supply and output pins
  • Small low profile: X2-DFN1410-4


  • Smart cover or dock detect for cellular phones and tablet
  • Position detect for digital still, video cameras and handheld gaming consoles
  • Door, lids and tray position detect switches home appliances and industrial applications
  • Level, proximity and position switches
  • Contactless switches in home appliances and industrial applications