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Micropower Omnipolar Hall Effect Switch

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The AH1808 is a high sensitivity, micropower Omnipolar Hall Effect switch IC designed for portable and battery powered equipment such as cellular phones, PDA’s and portable PC’s to home appliance and industrial applications. Based on two sensitive Hall Effect plates and a chopper stabilized architecture the AH1808 provides a reliable solution over the whole operating range. To support portable and battery powered equipment the design has been optimized to operate over the supply range of 2.5V to 3.6V and consumes only 24uW with a supply of 3V. To minimize PCB space AH1808 packaged in samll low profilepackages. The single open drain output can switched on with either a North or South pole of sufficient strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (Bop) the output is switched on (pul°C low). The output is turned off when B becomes lower than the release point (Brp). The output will remain off when there is no magnetic field. The AH1808 is available in a small low profile SOT553 and industry standard SC59 packages.


  • Cover switch in Netbook, Notebook, Tablets and PDAs
  • Cover switch in clam-shell and slide cellular phones
  • Camcorders
  • Contact-less switch in portable and battery powered to applications
  • Contact-less switch in home appliances and industrial applications

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
AEC Qualified No
# Outputs 1
Output Type Open Drain
ActiveHigh orLow Low
Sensitivity High
Operating Voltage (V) 2.5 to 5.5 V
Average Supply Current (µA) 8 µA
Min OperatingPoint ±Bop (Guass) 20
Typ OperatingPoint ±Bop(Guass) 40
Max OperatingPoint ±Bop(Guass) 60
Min ReleasePoint ±Brp(Guass) 10
Typ ReleasePoint ±Brp(Guass) 30
Max ReleasePoint ±Brp(Guass) 50
Operating Ambient Temperature Range (°C) -40 to 85 °C

Technical Documents

Recommended Soldering Techniques



Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Avnet EU 78000 8/16/2022 Germany Buy Now
Digi-Key Electronics 17 8/16/2022 Europe, Asia, North America Buy Now
Farnell, An Avnet Company 706 8/16/2022 England Buy Now
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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site