Diodes Incorporated
X2 DFN1410 4

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Micropower Omnipolar Hall Effect Switch

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The AH1925 is an ultra-low power digital and high sensitivity omnipolar Hall effect switch IC from Diodes Incorporated’s broad Hall Effect switches family. The sensitive device is designed to meet a wide range of potential applications with low power requirements including battery-operated equipment, the average supply current is only 1.4μA at 1.85V. To support portable equipment the AH1925 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. The high ESD level up to 8kV helps to improve the system robustness. To minimize PCB space the AH1925 is available in small low profile X2-DFN1410-4 package.

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).


  • Omnipolar Operation (North or South Pole)
  • Supply Voltage of 1.6V to 3.6V
  • Micropower Operation
  • Chopper Stabilized Design Provides:
  • Superior Temperature Stability
  • Minimal Switch Point Drift
  • Enhanced Immunity to Physical Stress
  • AH1925 is Open-Drain Output
  • -40°C to +85°C Operating Temperature
  • High ESD Capability of 8kV (Human Body Model)
  • Small Low Profile, X2-DFN1410-4 Package
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)


  • Smart Cover or Dock Detect for Cellular Phones and Tablet PCs
  • Gas or Water Consumption Measurement in Remote, Battery- Operated Utility Meters
  • Medical Devices, IoT Systems
  • Level, Proximity and Position Switches
  • E-Locks, Smoke Detectors, Appliances

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) 1.6 to 3.6
Average Supply Current (mA) 0.0014
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 14
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 25
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 35
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 9
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 20
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) 30
Operating Ambient Temperature (°C) -40 to 85

Technical Documents

Recommended Soldering Techniques