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PDF AH9249 Data sheet ( Hoja de datos )
| Número de pieza | AH9249 | |
| Descripción | High Sensitivity Micropower Omnipolar Hall-Effect Switch | |
| Fabricantes | BCD | |
| Logotipo |  |
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Data Sheet
High Sensitivity Micropower Omnipolar Hall-Effect Switch
AH9249
General Description
The AH9249 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 AH9249 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
• ESD Rating: 4000V (Human Body Model)
600V (Machine Model)
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
Jul. 2011 Rev. 1. 6
Figure 1. Package Types of AH9249
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
High Sensitivity Micropower Omnipolar Hall-Effect Switch
AH9249
Electrical Characteristics
VCC =3V, TA =25°C, unless otherwise specified.
Parameter
Supply Voltage
Supply Current
Output Current
Output Leakage Current
Saturation Voltage
Awake Mode Time
Sleep Mode Time
Duty Cycle
Chopper Frequency
Symbol
VCC
IAW
ISL
IAVG
IOUT
ILEAK
VSAT
tAW
tSL
D
fC
Conditions
Operating
Awake
Sleep
Average
B<︱BRP︱
IOUT =1.0mA
Operating
Operating
Min Typ Max Unit
2.5 3 5.5 V
2 4 mA
6 10 μA
10 15 μA
1.0 mA
<0.1 1
μA
0.4 V
150 μs
90 120 ms
0.15 %
15 kHz
Magnetic Characteristics (Note 3)
VCC =3V, TA=25°C, unless otherwise specified.
Parameter
Operating Point
Releasing Point
Hysteresis
Symbol
BOPS
BOPN
BRPS
BRPN
BHYS
Conditions
South pole to branded side
B>BOPS,VOUT=low (output on)
North pole to branded side
B>BOPN,VOUT=low (output on)
South pole to branded side
B<BRPS,VOUT=high (output off)
North pole to branded side
B<BRPN,VOUT=high (output off)
︱BOPX - BRPX︱(Note 4)
Min
-55
5
Typ
30
-30
20
-20
10
Note 3: The specifications stated here are guaranteed by design. 1 Gauss=0.1Mt.
Note 4: BOPX=operating point (output turns on); BRPX=releasing point (output turned off).
Max
55
-5
Unit
Gauss
Gauss
Gauss
Gauss
Gauss
Jul. 2011 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
5
5 Page 
High Sensitivity Micropower Omnipolar Hall-Effect Switch
Mechanical Dimensions
TO-92S-3
Data Sheet
AH9249
Unit: mm(inch)
0.750(0.030)
TYP
44°
46°
1.420(0.056)
1.620(0.064)
1.850(0.073)
2.150(0.085)
3.850(0.152)
4.150(0.163)
Package Sensor Location
0.380(0.015)
0.550(0.022)
1.050(0.041)
1.350(0.053)
2.900(0.114)
3.310(0.130)
1.600(0.063)
TYP
0.360(0.014)
0.480(0.019)
14.000(0.551)
15.500(0.610)
1.270(0.050)
TYP
0.360(0.014)
0.510(0.020)
Jul. 2011 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AH9249.PDF ] | |
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