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The AH1388 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 AH1388 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 12μA at 1.85V. To minimize PCB space, the AH1388 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).


  • 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
  • Contact-Less Switches in Home Appliances and Industrial Applications


  • 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
  • Micropower 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: -40C to +85C
  • 1.5kV ESD on Supply and Output Pins
  • Small Low Profile: X2-DFN1410-4
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Output Type Dual Pole Dependent, Push-Pull Active Low
Operating Voltage 1.6 to 3.6 V
Average Supply Current 0.012 mA
Grade N/A
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Min) 6
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Typ) 17
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Max) 25
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Min) 2
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Typ) 11
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Max) 20
Operating Ambient Temperature -40 to +85 °C

Technical Documents

Recommended Soldering Techniques



Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Countries/Regions
AH1388-HK4-7 Mouser Electronics Inc. 3820 10/24/2020 Buy Now South America, North America, Asia, Europe, Middle East
AH1388-HK4-7 Digi-Key Electronics 3941 10/23/2020 Buy Now Europe, Asia, North America