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The AH3574 is a high voltage high sensitivity Hall Effect Omnipolar switch IC designed for proximity, position and level sensing in consumer home appliances, automation, office equipment, smart home to industrial applications. To support wide range of demanding applications, the design has been optimized to operate over the supply range of 3.0V to 28V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for internal circuits, the AH3574 provides a reliable solution over the whole operating range. For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the supply. The output has an over current limit and a Zener clamp.

The single open drain output can be switched on with South or North pole of sufficient strength. When the magnetic flux density (B) perpendicular to the package is larger than the operate point (BOP) the output is switched on (pulled low) and is held on until magnetic flux density B is lower than the release point (BRP).


  • Omnipolar Operation 
  • High Sensitivity: BOP and BRP of ±40G and ±25G Typical
  • Single Open Drain Output with Over Current Limit
  • 3.0V to 28V Operating Voltage Range
  • Chopper Stabilized Design Provides
    • Superior Temperature Stability
    • Minimal Switch Point Drift
    • Enhanced Immunity to Stress
  • Good RF Noise Immunity
  • Reverse Blocking Diode 
  • Zener Clamp on Supply and Output Pins 
  • -40°C to +125°C Operating Temperature
  • ESD: HBM > 6kV
  • Industry Standard SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) Packages


  • Position and Proximity Sensing in Consumer Home Appliances, Building Automation, Office Equipments, Cersonal Care and Industrial Applications 
  • Open and Close Detect
  • Position Detect
  • Level Detect
  • Flow Meters
  • Contact-Less Switches

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) 3 to 28 V
Average Supply Current (µA) 3000 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) 25
Max ReleasePoint ±Brp(Guass) 45
Operating Ambient Temperature Range (°C) -40 to 125 °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
Digi-Key Electronics 3570 11/29/2021 Europe, Asia, North America Buy Now
Mouser Electronics Inc. 1566 11/29/2021 South America, North America, Asia, Europe, Middle East Buy Now
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Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Arrow Electronics 661 11/29/2021 United States Buy Now
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