AH3574
HIGH VOLTAGE HIGH SENSITIVITY
HALL EFFECT OMNIPOLAR SWITCH
Description
Pin Assignments
The AH3574 is a high voltage high sensitivity Hall Effect Omnipolar
switch IC designed for proximity, position and level sensing in
consumer home appliances, 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.
(TOP View)
3 OUTPUT
1 VDD
GND 2
SOT23
(TOP View)
The single open drain output can be switched on with South or North
pole of sufficient strength. When the magnetic flux density (B)
3. OUTPUT
2. GND
VDD
perpendicular to the package is larger than the operate point (BOP
)
1.
the output is switched on (pulled low) and is held on until magnetic
flux density B is lower than the release point (BRP).
SIP-3 (Bulk Pack)
Features
Applications
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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
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Position and Proximity Sensing in Consumer Home Appliances,
Building Automation, Office Equipments and Industrial Applications
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Open and Close Detect
Position Detect
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Superior Temperature Stability
Minimal Switch Point Drift
Level Detect
Flow Meters
Enhanced Immunity to Stress
Contact-Less Switches
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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
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Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
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www.diodes.com
January 2018
© Diodes Incorporated
AH3574
Document number: DS40413 Rev. 1 - 2