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High Sensitivity Micropower Omnipolar Hall Effect Switch

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The AH1897 is a high sensitivity micropower Omnipolar Hall effect switch IC with internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs, the average supply current is only 4.3uA at 1.85V. To support portable equipment the AH1897 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. To minimize PCB space the AH1897 is available in small low profile packages. The single output is activated with either a north or south pole of sufficient magnetic field strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (Bop), the output will be turned on (pul°C low) and held until B is lower than release point (Brp). The output will remain off when there is no magnetic field. The AH1897 is available in a small low profile X1-DFN1216-4 package.


  • Cover or Display Switch in Low Profile Portable PCs (eg Ultrabooks)
  • Open and Close Detect for Flip/Slide Cellular Phones
  • Holster or Cover Detect for Cellular Phones and Tablet PCs
  • Digital Still, Video Cameras and Handheld Gaming Consoles
  • Contactless switch

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Qualified to AEC-Q10x No
# Outputs 1
Output Type Push-Pull
ActiveHigh orLow Low
Sensitivity High
Operating Voltage (V) 1.6 to 3.6 V
Average Supply Current (µA) 4.3 µA
Min OperatingPoint ±Bop (Guass) 14
Typ OperatingPoint ±Bop(Guass) 30
Max OperatingPoint ±Bop(Guass) 40
Min ReleasePoint ±Brp(Guass) 10
Typ ReleasePoint ±Brp(Guass) 20
Max ReleasePoint ±Brp(Guass) 35
Operating Ambient Temperature Range (°C) -40 to 85 °C

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RS Components 3000 9/27/2021 England Buy Now
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Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Avnet EU 12000 9/27/2021 Germany Buy Now
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Product Change Notices

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