AH3368Q
HIGH VOLTGAE LOW SENSITIVITY
AUTOMOTIVE HALL EFFECT UNIPOLAR SWITCH
Description Pin Assignments
The AH3368Q is an AECQ100 qualified high voltage low sensitivity
Hall Effect Unipolar switch IC designed for position and proximity
sensing in automotive applications such as in seat and seatbelt
(Top View)
buckle, steering lock/immobilisation, gear stick, transmission actuator
and gear position, HVAC compression, wiper, door/trunk closure, etc.
To support wide range of demanding applications, the design has
3 OUTPUT
been optimized to operate over the supply range of 3.0V to 28V. With
GND 2
chopper stabilized architecture and an internal bandgap regulator to
provide temperature compensated supply for internal circuits, the
1 V
DD
AH3368Q 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
SOT23
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 (B ) the output is
OP
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. (Top View)
3.
OUTPUT
Features
2. GND
Unipolar Operation
1. V
DD
Low Sensitivity: B and B of 150G and 125G Typical
OP RP
Single Open Drain Output with Over Current Limit
SIP-3 (Bulk Pack)
3.0V to 28V Operating Voltage RP0ange
Chopper Stabilized Design Provides
o Superior Temperature Stability
o Minimal Switch Point Drift
o Enhanced Immunity to Stress
Good RF Noise Immunity
Applications
Reverse Blocking Diode
Zener Clamp on Supply and Output Pins
Position and Proximity Sensing in Automotive Applications
-40C to +150C Operating Temperature
Seat Position
ESD: HBM > 8kV, CDM: > 2kV
Seatbelt Buckle
AECQ100 Grade 0 Qualified
Steering Lock/Immobilisation
Industry Standard SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk
Gear Stick
Pack) Packages
HVAC Compression
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Transmission Actuator
Halogen and Antimony Free. Green Device (Note 3)
Transmission Gear Position
Wipers
Sunroof and Windows
Door/Trunk Closure
Door Locks
Contact-Less Switches
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See Low-Pass Filter
Sample and
Hold
Dynamic Offset
Cancellation
AH3368Q
Typical Applications Circuit (Note 4)
3.0V to 28V
V
DD
R
L
OUTPUT
AH3368Q
C
IN
GND
Note: 4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF.
R is the pull-up resistor.
L
Pin Descriptions
Package: SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack)
Pin Number Pin Name Function
1 V Power Supply Input
DD
2 GND Ground
3 OUTPUT Output Pin
Functional Block Diagram
V
DD
Power
switch
To All Subcircuits
OUTPUT
Amp Amp
Control
Current
Limit
GND
2 of 14
AH3368Q November 2016
Diodes Incorporated
www.diodes.com
Document number: DS39180 Rev. 1 - 2
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