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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).


  • 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


  • 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

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
# Outputs 1
Output Type Open Drain
Active High or Low Low
Sensitivity High
Operating Voltage 3 to 28 V
Average Supply Current 3,000 µA
Min Operating Point ±Bop (Guass) 20
Typ Operating Point ±Bop (Guass) 40
Max Operating Point ±Bop (Guass) 60
Min Release Point ±Brp (Guass) 10
Typ Release Point ±Brp (Guass) 25
Max Release Point ±Brp (Guass) 45
Operating Ambient Temperature Range -40 to 125 °C

Related Content

SIP-3 (Ammo)
SIP-3 (Bulk)


Technical Documents

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AH3574-P-A Arrow Electronics 3995 2/25/2020 Buy Now United States
AH3574-P-A Digi-Key Electronics 3810 2/25/2020 Buy Now United States
AH3574-P-A Mouser Electronics Inc. 4000 2/25/2020 Buy Now United States
AH3574-P-A Future Electronics - Europe 200 2/24/2020 England
AH3574-P-B Arrow Electronics 2956 2/25/2020 Buy Now United States
AH3574-P-B Digi-Key Electronics 506 2/25/2020 Buy Now United States
AH3574-P-B Mouser Electronics Inc. 621 2/25/2020 Buy Now United States
AH3574-SA-7 Digi-Key Electronics 4965 2/25/2020 Buy Now United States
AH3574-SA-7 Mouser Electronics Inc. 9036 2/25/2020 Buy Now United States