AH3372 (Diodes)
HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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Description
The AH3372 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.
AH3372
HIGH VOLTAGE HIGH SENSITIVITY
HALL EFFECT UNIPOLAR SWITCH
Pin Assignments
(TOP View)
GND 2
3 OUTPUT
1 VDD
SC59 and SOT23
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. The 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.
(TOP View)
SIP-3 (Bulk Pack)
3. OUTPUT
2. GND
1. VDD
Features
Unipolar Operation
High Sensitivity: BOP and BRP of +30G and +20G 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
-40°C to +125°C 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)
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) & 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.
AH3372
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AH3372 (Diodes)
HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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Typical Applications Circuit
AH3372
3.0V to 28V
VDD
RL
OUTPUT
CIN AH3372
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
Function
Power Supply Input
Ground
Output Pin
Functional Block Diagram
VDD
Power
switch
To All Subcircuits
Amp
Amp
Control
OUTPUT
Current
Limit
GND
AH3372
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AH3372 (Diodes)
HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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AH3372
Absolute Maximum Ratings (Notes 5 & 6) (@TA = +25°C, unless otherwise specified.)
Symbol
VDD
VDDR
VOUT_MAX
IOUT
IOUT_R
B
PD
Ts
TJ
ESD HBM
Supply Voltage (Note 6)
Reverse Supply Voltage (Note 6)
Output Off Voltage (Note 6)
Continuous Output Current
Characteristic
Reverse Output Current
Magnetic Flux Density
Package Power Dissipation
SIP-3 (Ammo Pack),
SIP-3 (Bulk Pack)
SC59 and SOT23
Storage Temperature Range
Maximum Junction Temperature
Electros Static Discharge Withstand - Human Body Model (HBM)
Value
32
-32
32
60
-50
Unlimited
550
230
-65 to +165
+150
6
Unit
V
V
V
mA
mA
mW
°C
°C
kV
Notes:
5. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
6. The absolute maximum VDD of 32V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to
operate the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions (@TA = -40°C to +125°C, unless otherwise specified.)
Symbol
VDD
TA
Parameter
Supply Voltage
Operating Temperature Range
Operating
Operating
Condition
Rating
3.0 to 28
-40 to +125
Unit
V
°C
Electrical Characteristics (Note 7 & 8) (@TA = -40°C to +125°C, VDD = 3V to 28V, unless otherwise specified.)
Symbol
Parameter
Condition
Min Typ Max Unit
VOUT_ON
ILKG
IDD
IDD_R
tP_ON
fC
tD
tR
tF
IOCL
VZ
Output ON Voltage
Output Leakage Current
(When output is off)
Supply Current
Reverse Battery Current
Device Power-On Time (Start-up time)
Chopping Frequency
Response Time Delay
(Time from magnetic threshold
reached to the start of the output rise
or fall)
Output Rising Time
(External pull-up resistor RL and load
capacitance dependent)
Output Falling Time
(Internal switch resistance and load
capacitance dependent)
Output Current Limit
Zener Clamp Voltage
IOUT = 20mA, B > BOP
VOUT = 28V, B < BRP, Output off
Output open, TA = +25°C
Output open, TA = -40°C to +125°C
VDD = -18V, TA = -40°C to +125°C
VDD = -28V, TA = -40°C to +125°C
VDD >= 3V, B > BOP (Note 7)
-
(Note 9)
RL = 1kΩ, CL = 20pF
RL = 1kΩ, CL = 20pF
B > BOP, (Note 10 )
IDD = 5mA
-
0.2 0.4
V
-
<0.1
10
µA
- 3 3.5 mA
- - 4 mA
-
-0.01
1
mA
-
-0.01 1.5
mA
- 10 - µs
- 800 - kHz
- 3.75 -
µs
- 0.2 1 µs
- 0.1 1 µs
30 - 55 mA
28 - - V
Notes:
7. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is valid
after the start-up time of 10µs typical from the operating voltage reaching 3V.
8. Typical values are defined at TA = +25°C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production but
guaranteed by design, process control and characterization.
9. Guaranteed by design, process control and characterization, Not tested in production.
10. The device will limit the output current IOUT to current limit of IOCL.
AH3372
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AH3372 (Diodes)
HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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AH3372
Magnetic Characteristics (Notes 11 &12) (TA = -40°C to +125°C, VDD = 3.0V to 28V, unless otherwise specified.)
Symbol
BOPS (South pole to the part marking
side for SOT23 and SIP-3 (Ammo Pack),
SIP-3 (Bulk Pack) packages;
South pole to the non-part marking side
for SC59 package. See diagram below)
BRPS (South pole to the part marking
side for SOT23 and SIP-3 (Ammo Pack),
SIP-3 (Bulk Pack) packages;
South pole to the non-part marking side
for SC59 package. See diagram below)
Parameter
Operation Point
Release Point
Condition
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
(1mT=10 Gauss)
Min Typ Max Unit
- 30 -
15 30 45
- 20 -
Gauss
5 20 35
BHY (|BOPX|-|BRPX|)
Hysteresis (Note 13)
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
- 10 -
5 10 17
Notes:
11. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is valid
after the start-up time of 10us typical from the operating voltage reaching 3V.
12. Typical values are defined at TA = +25°C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production
but guaranteed by design, process control and characterization.
13. Maximum and minimum hysteresis is guaranteed by design, process control and characterization.
Output
(Off-state) VDD
Turn off BHY Turn on
(On-state)
VOUT_ON = VSAT
0 BRPS BOPS
( Magnetic Flux Density B )
S
Part mark
N
SC59
S
Part mark
S
Part mark
N
SOT23
N
SIP-3(Ammo Pack)
SIP-3(Bulk Pack)
AH3372
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HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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Typical Operating Characteristics
Output Switch Operate and Release Points (Magnetic Thresholds) BOPS and BRPS
AH3372
Supply Current
AH3372
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HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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Typical Operating Characteristics (Cont.)
Supply Reverse Current
Output Switch On Voltage
Output Switch Leakage Current
AH3372
AH3372
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HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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Typical Operating Characteristics (Cont.)
Output Current Limit
AH3372
AH3372
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HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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AH3372
Thermal Performance Characteristics
(1) Package Type: SC59 and SOT23
TA (°C)
PD (mW)
25 50 60 70 80 85 90 100 105 110 120 125 130 140 150
230 184 166 147 129 120 110 92 83 74 55 46 37 18 0
Power Dissipation Curve
300
200
100
0
-040
25
50 75 100
Ambient Temperature TA (oC)
125
150
(2) Package Type: SIP-3 (Ammo Pack), SIP-3 (Bulk Pack)
TA (°C)
PD (mW)
25 50 60 70 80 85 90 100 105 110 120 125 130 140 150
550 440 396 362 308 286 264 220 198 176 132 110 88
44
0
PD (mW)
600
500
400
300
200
100
0
-040
Power Dissipation Curve
25 50 75 100
125 150
TA (°C)
AH3372
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HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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Ordering Information
AH3372
AH3372 - X - X
Product Name
Package
P : SIP-3(Ammo Pack)
P : SIP-3(Bulk Pack)
SA : SOT23
W : SC59
Packing
7 : Tape & Reel
A: Ammo Box (Note 14)
B: Bulk (Note 15)
Part Number
Package
Code
Packaging
AH3372-P-A
AH3372-P-B
P SIP-3 (Ammo Pack)
P SIP-3 (Bulk Pack)
AH3372-SA-7 SA
SOT23
AH3372-W-7
W
SC59
Bulk
Quantity Part Number
Suffix
NA NA
1000
-B
7” Tape and Reel
Quantity
Part Number
Suffix
NA NA
NA NA
NA NA 3000/Tape & Reel -7
NA NA 3000/Tape & Reel -7
Ammo Box
Quantity Part Number
Suffix
4000/Box
NA
-A
NA
NA NA
NA NA
Notes:
14. Ammo Box is for SIP-3 (Ammo Pack) Spread Lead.
15. Bulk is for SIP-3 (Bulk Pack) Straight Lead.
Marking Information
(1) Package Type: SC59 and SOT23
( Top View )
XX Y W X
XX : Identification code
Y : Year 0 to 9
W : Week : A to Z : 1 to 26 week;
a to z : 27 to 52 week; z represents
52 and 53 week
X : Internal code
Part Number
AH3372
AH3372
Package
SC59
SOT23
Identification Code
DS
MS
(2) Package Type: SIP-3 (Ammo Pack), SIP-3 (Bulk Pack)
Part Number
( Top View )
3372
Y WW X
Y : Year : 0~9
WW : Week : 01~52, "52" represents
52 and 53 week
X : Internal Code
Part Number
AH3372
AH3372
Package
SIP-3(Ammo Pack)
SIP-3(Bulk Pack)
Identification Code
3372
3372
AH3372
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HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH

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Package Outline Dimensions (All dimensions in mm.)
Please see http://www.diodes.com/package-outlines.html for the latest version.
(1) Package Type: SC59
A
BC
G
H
K
N
J DL
M
SC59
Dim Min Max Typ
A 0.35 0.50 0.38
B 1.50 1.70 1.60
C 2.70 3.00 2.80
D - - 0.95
G-
- 1.90
H 2.90 3.10 3.00
J 0.013 0.10 0.05
K 1.00 1.30 1.10
L 0.35 0.55 0.40
M 0.10 0.20 0.15
N 0.70 0.80 0.75
0° 8° -
All Dimensions in mm
Min/Max
CL
PART
MARKING
SURFACE
Hall Sensor
Die
Pin1
1.3/1.5
Sensor Location
AH3372
AH3372
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Package Outline Dimensions (Cont.) (All dimensions in mm.)
Please see http://www.diodes.com/package-outlines.html for the latest version.
(2) Package Type: SOT23
K1 K
H
A
All 7°
J
M
L
GAUGE PLANE
0.25
a
L1
CB
D
FG
AH3372
SOT23
Dim Min Max Typ
A 0.37 0.51 0.40
B 1.20 1.40 1.30
C 2.30 2.50 2.40
D 0.89 1.03 0.915
F 0.45 0.60 0.535
G 1.78 2.05 1.83
H 2.80 3.00 2.90
J 0.013 0.10 0.05
K 0.890 1.00 0.975
K1 0.903 1.10 1.025
L 0.45 0.61 0.55
L1 0.25 0.55 0.40
M 0.085 0.150 0.110
a 0° 8° --
All Dimensions in mm
Min/Max
Pin1
PART
MARKING
SURFACE
Hall Sensor
Die
1.4/1.5
Sensor Location
AH3372
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Package Outline Dimensions (Cont.) (All dimensions in mm.)
Please see http://www.diodes.com/package-outlines.html for the latest version.
(3) Package Type: SIP-3 (Bulk Pack)
a4(2x
a3(2x
S
D
J
A
E
L1 b2
F
L
AH3372
SIP-3 (Bulk Pack)
Dim Min Max Typ
A 1.40 1.60 1.50
b 0.33 0.43 0.38
b2 0.40 0.508 0.46
c 0.35 0.41 0.38
D 3.90 4.30 4.10
E 2.80 3.20 3.00
e1 1.24 1.30 1.27
F 0.00 0.20 --
J 2.62 REF
L 14.00 15.00 14.50
L1 1.55 1.75 1.65
S 0.63 0.84 0.74
a1 --
-- 5
a2 --
-- 5
a3 --
-- 45
a4 --
-- 3
All Dimensions in mm
b
e1
c
PART
MARKING
SURFACE
1.90/2.10
Min/Max
0.63/0.84
0.27/0.48
1.05/1.25
Hall Sensor
PART
MARKING
SURFACE
123
Sensor Location
AH3372
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Package Outline Dimensions (Cont.) (All dimensions in mm.)
Please see http://www.diodes.com/package-outlines.html for the latest version.
(4) Package Type: SIP-3 (Ammo Pack)
a4(2x
A
L
a3(2x
L3 L1
e1
S
D
J
E
b2a
F
La
AH3372
SIP-3
(Ammo Pack)
Dim Min Max Typ
A 1.40 1.60 1.50
b 0.33 0.43 0.38
b2a 0.40 0.52 0.46
c 0.35 0.41 0.38
D 3.90 4.30 4.10
E 2.80 3.20 3.00
e1 1.24 1.30 1.27
e2 2.40 2.90 2.65
F 0.00 0.20 --
J 2.62 REF
L 14.00 15.00 14.50
La 12.90 14.90 13.90
L1 1.55 1.75 1.65
L3 2.00 3.00 2.50
S 0.63 0.84 0.74
a1 -- -- 5
a2 -- -- 5
a3 -- -- 45
a4 -- -- 3
All Dimensions in mm
e2
cb
PART
MARKING
SURFACE
1.90/2.10
Min/Max
0.63/0.84
0.27/0.48
1.05/1.25
Hall Sensor
PART
MARKING
SURFACE
123
Sensor Location
AH3372
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Suggested Pad Layout
Please see http://www.diodes.com/package-outlines.html for the latest version.
(1) Package Type: SC59
Y
Z
C
X
(2) Package Type: SOT23
Y
Y1
E
C
X X1
AH3372
Dimensions
Z
X
Y
C
E
Value (in mm)
3.4
0.8
1.0
2.4
1.35
Dimensions
C
X
X1
Y
Y1
Value (in mm)
2.0
0.8
1.35
0.9
2.9
AH3372
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AH3372
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2018, Diodes Incorporated
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