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PDF AH922 Data sheet ( Hoja de datos )
| Número de pieza | AH922 | |
| Descripción | UNIPOLAR HALL-EFFECT SWITCH | |
| Fabricantes | BCD | |
| Logotipo |  |
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Data Sheet
UNIPOLAR HALL-EFFECT SWITCH
AH922
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.
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
BCD Semiconductor Manufacturing Limited
1
1 page  
UNIPOLAR HALL-EFFECT SWITCH
Absolute Maximum Ratings (Note 1)
Data Sheet
AH922
Parameter
Supply Voltage
Output Current (Continuous)
Power Dissipation
Operation Temperature
Storage Temperature
Maximum Junction Temperature
ESD (Human Body Model)
Symbol
VCC
IOUT
PD
TA
TSTG
TJ (Max)
ESD
Value
24
25
TO-92S-3
400
SOT-23-3
230
-50 to 150
-65 to 150
165
4000
Unit
V
mA
mW
ºC
ºC
ºC
V
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
VCC
TA
Min
3.5
-40
Max
22
125
Unit
V
ºC
May 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
5 Page 
UNIPOLAR HALL-EFFECT SWITCH
Typical Performance Characteristics (Continued)
Data Sheet
AH922
150
140 B
OP
130 B
RP
120 B
HYS
110
100
90
80
70
60
50
40
30
2 4 6 8 10 12 14 16 18 20 22 24 26
V (V)
CC
Figure 13. BOP/ BRP/ BHYS vs. VCC
150
140 B
OP
130 B
120 RP
B
110 HYS
100
90
80
70
60
50
40
30
20
-50 -25 0 25 50 75 100 125 150
T (oC)
A
Figure 14. BOP/ BRP/ BHYS vs. TA
450
400
350
300
250
200
150
100
50
0
0
SOT-23-3
TO-92S-3
25 50 75 100 125 150
T (oC)
A
Figure 15. PD vs. TA
May 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
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