Data Sheet
UNIPOLAR HALL-EFFECT SWITCH
General Description
The AH922 is a unipolar Hall-effect one-chip switch
with digital output, solution for sense magnetic field.
It is designed in mixed signal CMOS and chopper
technology. This IC is quite suitable for use in
automotive, industrial and consumer applications.
The two sensors are suited for operation over
extended temperature ranges.
The
AH922
Hall-effect switch is combined with a
voltage regulator, Hall-voltage generator, chopper
small-signal amplifier, Schmitt trigger and
open-drain output.
The AH922 is available in TO-92S-3 and SOT-23-3
packages.
AH922
Features
•
•
•
•
•
•
•
Wide Operating Voltage Range
Chopper Stabilization
Extremely Low Switch Point Drift
Superior Temperature Stability
High Sensitivity Integrated Hall Sensor
Solid State Reliability
Robust EMC Capability
Applications
•
•
•
•
5V/12V DC Brushless Motor/Fan
Solid State Switch
Speed Detection
Revolution Counting
TO-92S-3
SOT-23-3
Figure 1. Package Types of AH922
May 2012
Rev. 1. 1
1
BCD Semiconductor Manufacturing Limited
Data Sheet
UNIPOLAR HALL-EFFECT SWITCH
Pin Configuration
Z3 Package
(TO-92S-3)
N Package
(SOT-23-3)
AH922
3
3
2
1
1
2
(Front View)
(Top View)
Figure 2. Pin Configuration of AH922
Pin Description
Pin Number
TO-92S-3 SOT-23-3
1
2
3
1
3
2
Pin Name
VCC
GND
OUT
Supply voltage
Ground pin
Output pin
Function
May 2012
Rev. 1. 1
2
BCD Semiconductor Manufacturing Limited
Data Sheet
UNIPOLAR HALL-EFFECT SWITCH
Functional Block Diagram
AH922
Figure 3. Functional Block Diagram of AH922
May 2012
Rev. 1. 1
3
BCD Semiconductor Manufacturing Limited
Data Sheet
UNIPOLAR HALL-EFFECT SWITCH
Ordering Information
AH922
AH922
-
Circuit Type
G1: Green
TR: Tape & Reel
Blank: Bulk
Package
Z3: TO-92S-3
N: SOT-23-3
Package
TO-92S-3
Temperature
Range
-40 to 125°C
Part Number
AH922Z3-G1
AH922NTR-G1
Marking ID
922
GT4
Packing Type
Bulk
Tape & Reel
SOT-23-3
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS
compliant and green.
May 2012
Rev. 1. 1
4
BCD Semiconductor Manufacturing Limited
Data Sheet
UNIPOLAR HALL-EFFECT SWITCH
Absolute Maximum Ratings (Note 1)
Parameter
Supply Voltage
Output Current (Continuous)
Power Dissipation
Operation Temperature
Storage Temperature
Maximum Junction Temperature
ESD (Human Body Model)
AH922
Symbol
V
CC
I
OUT
TO-92S-3
P
D
SOT-23-3
T
A
T
STG
T
J
(Max)
ESD
Value
24
25
400
230
Unit
V
mA
mW
ºC
ºC
ºC
V
-50 to 150
-65 to 150
165
4000
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Ambient Temperature
Symbol
V
CC
T
A
Min
3.5
-40
Max
22
125
Unit
V
ºC
May 2012
Rev. 1. 1
5
BCD Semiconductor Manufacturing Limited
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