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NIPPON CERAMIC CO., LTD. SH 248 High Sensitivity CMOS Micropower Hall Switch
SH248 includes the following on a single silicon chip: voltage regulator, Hall voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short circuit protected open-drain output. Advanced CMOS wafer fabrication processing is used to take advantage of low-voltage requirements, component matching, very low input-offset errors, and small component geometries.
FEATURES
z z z z z CMOS Hall IC Technology Solid-State Reliability much better than reed switch Micro power consumption for battery-powered applications Omni polar output switches with absolute value of North or South pole from magnet High Sensitivity for reed switch replacement
TYPICAL APPLICATION
z z Solid state switch Handheld Wireless Handset Awake Switch ( Flip Cell/PHS Phone/Note Book/Flip Video Set) Lid close sensor for battery powered devices Magnet proximity sensor for reed switch replacement in low duty cycle applications
z z
ABSOLUTE MAXIMUM RATINGS At (TA=25℃)
Parameter Supply Voltage Output Current Output Voltage Operating Temperature Range ( E ) Storage Temperature Range Symbol VCC IOUT VOUT TA TS Value Min Max 2.5 -0.3 -40 -55 3.5 1 3.5 85 150 Unit V mA V ℃ ℃
FUNCTIONAL BLOCK DIAGRAM
SH248 ELECTRICAL www.DataSheet4U.com
Parameter Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Operate Point
& MAGNETIC CHARACTERISTICS (At TA=25℃ , VCC=3V)
Test Condition Symbol VCC IOUT=1mA, B>BOP VOUT=3V, BBOP) VOUT=Low(On)
S/N Pole (B>BOP)
(UA package) PERFORMANCE GRAPHS
VOUT=Low(On)
(SO package)
Typica Magnetic Switchpoints versus Temperature
5 4 3
Typical Magnetic Switchpoints versus VCC
5 www.DataSheet4U.com 4 3
BOPS BRPS
Fl ux dens i t y( m T)
Fl ux dens i t y( m T)
2 1 0
BOPS-25℃ BOPN-25℃ BOPS-85℃ BOPN-85℃
BRPS-85℃ BRPN-85℃ BRPS-25℃ BRPN-25℃
2 1 0
-1 -2 -3 -4 -5 2. 2
-1 -2 -3
BRPN BOPN
- 40 - 20
0 20 40 60 80
2.5
2. 8
VCC( V)
3. 1
3.4
3. 7
-4
Tem per at ur e( ℃)
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Typical Current Consumption versus Supply Voltage
10
10
Typical Current Consumption versus Temperature
Average Current(μA)
8
8
Average Current(μA)
6
Current Consumption
C u rre n t C o n s u m p tio n
6
Sleep Current(μA)
4
Sleep Current(μA)
4
2
2
Awake Current(mA)
0 -40
Awake Current(mA)
0 1 1.5 2.0 2.5 3.0
3.5
-20
0
20
40
60
80 100
Supply Voltage(V)
Temperature(℃)
POWER DISSIPATION VERSUS TEMPERATURE
Power Dissipation Curve
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