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AH3373

HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH



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AH3373 pdf
Description
The AH3373 is a high voltage high sensitivity Hall Effect Unipolar
switch IC designed for proximity, position and level sensing in
industrial and consumer home appliances and personal care
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 AH3372 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 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). The output remains switched off for
North pole fields to or no magnetic fields.
The magnetic operating and release polarity is opposite for SOT23
and SC59 packages. SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk
Pack) packages require south pole to the part marking side to operate
while SC59 requires south pole to the non-part marking side.
Features
Unipolar Operation
High Sensitivity: BOP and BRP of +55G and +35G Typical
Single Open Drain Output with Over Current Limit
3.0V to 28V Operating Voltage Range
Chopper Stabilized Design Provides
o Superior Temperature Stability
o Minimal Switch Point Drift
o Enhanced Immunity to Stress
Good RF Noise Immunity
Reverse Blocking Diode
Zener Clamp on Supply and Output Pins
-40C to +125C Operating Temperature
ESD: HBM 6kV
Industry Standard SC59, SOT23 and SIP-3 (Ammo Pack), SIP-3
(Bulk Pack) Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
AH3373
HIGH VOLTAGE HIGH SENSITIVITY
HALL EFFECT UNIPOLAR SWITCH
Pin Assignments
(TOP View)
GND 2
3 OUTPUT
1 VDD
SC59 and SOT23
(TOP View)
SIP-3 (Bulk Pack)
3. OUTPUT
2. GND
1. VDD
Applications
Position and Proximity Sensing in Consumer Home Appliances,
Building Automation, Office Equipments and Industrial Applications
Open and Close Detect
Position Detect
Level Detect
Flow Meters
Contact-less Switches
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com 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.
AH3373
Document number: DS38918 Rev. 1 - 2
1 of 15
www.diodes.com
July 2016
© Diodes Incorporated



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AH3373 pdf
Typical Applications Circuit
3.0V to 28V
VDD
RL
OUTPUT
CIN AH3373
GND
Note:
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF.
RL is the pull-up resistor.
Pin Descriptions
Package: SC59, SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack)
Pin Number
1
2
3
Pin Name
VDD
GND
OUTPUT
Power Supply Input
Ground
Output Pin
Function
AH3373
Functional Block Diagram
VDD
Power
switch
To All Subcircuits
Amp
Amp
Control
OUTPUT
Current
Limit
GND
AH3373
Document number: DS38918 Rev. 1 - 2
2 of 15
www.diodes.com
July 2016
© Diodes Incorporated



Part Number AH3373
Description HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH
Maker Diodes - Diodes
Total Page 15 Pages
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