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PDF AH9248 Data sheet ( Hoja de datos )
| Número de pieza | AH9248 | |
| Descripción | High Sensitivity Micropower Omnipolar Hall-Effect Switch | |
| Fabricantes | BCD | |
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Data Sheet
High Sensitivity Micropower Omnipolar Hall-Effect Switch
AH9248
General Description
The AH9248 is an ultra-sensitive Hall-effect switch
with digital latched output, mainly designed for
battery-operation, hand-held equipments.
Special CMOS process is used for low-voltage and
low-power requirement. A chopper stabilized
amplifier improves stability of magnetic switch
points. A sleep-awake logic controls the IC in sleep
time or awake time. This function will reduce the
average operating current of the IC. During the
awake time, the output is changed with the magnetic
flux density. During the sleep time, the output is
latched in its previous state and the current
consumption will reduce to some μA.
The IC switching behaviour is omnipolar, either north
or south pole sufficient strength will turn the output
on. If the magnetic flux density is larger than
operating point (BOP), the output will be turned on; if
it is less than releasing point (BRP), the output will be
turned off.
The AH9248 is available in TO-92S-3, SOT-23-3 and
DFN-2×2-3 packages which are optimized for most
applications.
Features
• Micropower Operation
• 2.5 to 5.5V Power Supply
• Switching for Both Poles of a Magnet
(Omnipolar)
• Stabilized Chopper
• Superior Temperature Stability
• Digital Output Signal
• Built-in Pull-up Resistor (AH9249)
Applications
• Cover Switch in Notebook PC/PDA
• Handheld Wireless Application Awake Switch
• Magnet Switch in Low Duty Cycle Applications
TO-92S-3
SOT-23-3
DFN-2×2-3
Figure 1. Package Types of AH9248
Jul. 2011 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
High Sensitivity Micropower Omnipolar Hall-Effect Switch
AH9248
Absolute Maximum Ratings (TA=25°C, Note 1)
Parameter
Supply Voltage
Supply Current (Fault)
Output Voltage
Output Current
Magnetic Flux Density
Power Dissipation
Storage Temperature
Junction Temperature
ESD (Machine Model) (Note 2)
Symbol
VCC
ICC
VOUT
IOUT
B
PD
TSTG
TJ
ESD
Value
7
6
7
2
Unlimited
TO-92S-3
400
SOT-23-3
DFN-2×2-3
230
230
-55 to 150
150
200
Unit
V
mA
V
mA
Gauss
mW
°C
°C
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.
Note 2: Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe
Electro Static Discharge control procedures whenever handling semiconductor products.
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Temperature
Symbol
VCC
TOP
Min
2.5
-40
Max
5.5
85
Unit
V
°C
Jul. 2011 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
5
5 Page 
High Sensitivity Micropower Omnipolar Hall-Effect Switch
Typical Application
Data Sheet
AH9248
Figure 14. Typical Application of AH9248
Jul. 2011 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet AH9248.PDF ] | |
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