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PDF SDC8312 Data sheet ( Hoja de datos )
| Número de pieza | SDC8312 | |
| Descripción | MicroPower Hall-Effect Switch | |
| Fabricantes | SDC | |
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Data sheet
MicroPower Hall-Effect Switch
General Description
SDC8312 is a micropower integrated Hall switch
designed to sense the applied magnetic flux
density and give a digital output, which indicates
the present condition of the magnitude sensed.
The typical power consumption is below 10 uW
at 2.7V, so the micropower design is especially
suitable for battery-operated systems such as
cellular phones or laptop computers, in which
power consumption is one major concern.
The magnetic switching points are precise and
insensitive to process and temperature
variations.
For SDC8312, the output will be at the “high”
level when no magnetic field is applied.
SDC8312/SDC8312A
Applications
Folding，sliding，rotary screen mobile phone
Notebook computer，digital camera
Position sensor switch
Features
Micropower consumption
2.4~4.5V power supply
Chopper amplifier based design: insensitive
to noise and offset caused by process
variations, operating temperature and
mechanical stress
Switching for both poles of a
magnet(Omnipolar)
Digital output
CMOS process
Package：SOT-23-3、TO-92S
Pin Configuration
SD C 8312
Figure 1. Pin Configuration
Pin Number
SOT-23-3
TO-92S
11
32
23
Pin Name
VDD
VSS
Q
Table 1. Pin Description
12 3
Function
Power supply
Ground
Output
Marth,2013 Rev1.2
○C 2013 Shaoxing Devechip Microelectronics Co.,Ltd
1/7
www.sdc-semi.com
1 page  
MicroPower Hall-Effect Switch
Typical Application
Data sheet
SDC8312/SDC8312A
Figure 6. Typical Application
Function Description
Power On Reset
Used to detect the power-up ramp and reset the
digital circuits to attain correct operation as soon
as the power is ready.
Oscillator + Sequencer
The built-in oscillator provides the clock signal,
which is taken by the sequencer to determine the
periods of the operating mode and the stand-by
mode. Typically the operating time is about 60 us
and the stand-by time is 75 ms. Using such a
clocking scheme, the average power
consumption is almost equal to the stand-by
mode, which is under 10 uW at 2.7V.
Bias Generator
Bias generator provides precise, temperature
and process insensitive current sources for both
the Hall plate and chopper amplifier. These
current sources in turn guarantee proper
operation of the chip and a accurate switching
point.
Chopper Amplifier
In order to get a higher resolution, IC uses the
chopper amplifier in the design. It can
dynamically remove the offset and interference.
Hysteresis Control
This block determines the switching threshold of
the Hall switch in different situations.
Marth,2013 Rev1.2
○C 2013 Shaoxing Devechip Microelectronics Co.,Ltd
5/7
www.sdc-semi.com
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SDC8312.PDF ] | |
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