Diodes Incorporated

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Micropower Omnipolar Hall Effect Switch

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The AH1815 is a low-sensitivity, micro-power Omnipolar Hall effect
switch IC, designed for portable and battery powered consumer
equipment for home appliance and industrial applications such as
smart-meter magnetic-tamper detection. Based on two sensitive Hall
effect plates and a chopper-stabilized architecture, the AH1815
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 5.5V and
consumes only 24μW with a supply of 3V.
The single open drain output can switch 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 (pulled 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.


  • Omnipolar (north or south pole) Operation
  • Low Sensitivity
  • Single Open Drain Output
  • Micropower Operation
  • 2.5V to 5.5V Operating Range
  • Chopper Stabilized Design Provides Superior Temperature Stability Minimal Switch Point Drift Enhanced Immunity to Stress
  • Good RF Noise Immunity
  • -40°C to +125°C Operating Temperature
  • ESD (HBM) > 6KV
  • Industry Standard SC59 Package
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device 


  • Doors, Lids, Covers and Tray Position Detect Switches
  • Display Switch for Portable PCs and Tablets
  • On/Off Switch for PDAs and Digital Cameras
  • Liquid Level Detection for Coffee Machines
  • Smart Meters
  • Position, Proximity and Level Detection Contactless Switch in Battery Powered Consumer, Home Appliances and Industrial Applications

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
AEC Qualified No
Type Omnipolar
Outputs Single
Output Type Open Drain
Active Output State (B > Bop) Low
Inactive Output State (B < Brp) High-Z
Operating Voltage (V) 2.5 to 5.5
Average Supply Current (mA) 0.008
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 255
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 395
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 540
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 230
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 335
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 495
Operating Ambient Temperature (°C) -40 to 125

Related Content


Technical Documents

Recommended Soldering Techniques


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