SDC8312AZS-G1 [SDC]

MicroPower Hall-Effect Switch;


型号：	SDC8312AZS-G1
厂家：	Shaoxing Devechip Microelectronics Co., Ltd
描述：	MicroPower Hall-Effect Switch
文件：	总7页 (文件大小：279K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Data sheet

MicroPower Hall-Effect Switch

SDC8312/SDC8312A

General Description

Applications

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.



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)

For SDC8312, the output will be at the “high”

level when no magnetic field is applied.



Digital output

CMOS process

Package：SOT-23-3、TO-92S

Pin Configuration

S D C 8312

Figure 1. Pin Configuration

Pin Number

Pin Name

Function

SOT-23-3

TO-92S

VDD

VSS

Power supply

Ground

Output

Table 1. Pin Description

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Data sheet

MicroPower Hall-Effect Switch

Functional Block Diagram

SDC8312/SDC8312A

Power On

Reset

Sequencer

Oscillator

Bias Generator

OUT

Chopper

Hall Plate

Hysteresis

control

Latch

Amplifier

Figure2. Functional Block Diagram

Ordering Information

Temperature

Package

Range

Part Number

Marking ID

Packing

Type

Pb-free

Halogen-free

Pb-free

8312

Halogen-free

8312

TO-92S

SDC8312ZS-E1

SDC8312ZS-G1

Bulk

Tape and

Reel

SOT-23-3

SDC8312J-E1

SDC8312J-G1

2xx

8312

2xx

8312

2xx

-40~85℃

TO-92S

SDC8312AZS-E1 SDC8312AZS-G1

SDC8312AJ-E1 SDC8312AJ-G1

Bulk

Tape and

Reel

SOT-23-3

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Data sheet

MicroPower Hall-Effect Switch

SDC8312/SDC8312A

Absolute Maximum Ratings（NOTE：Stresses greater than those listed under Absolute Maximum

Ratings may cause permanent damage to the device.）

Parameter

Conditions

Value

Unit

Operating Temperature

Storage Temperature

Supply Voltage

-40~85

-40~150

2.4~5.0

-1~2.5

℃

Supply Current

Magnetic Flux Density

Maximum Lead Soldering

Temperature

unlimited

10 seconds

<260

℃

Table 2. Absolute Maximum Ratings

Recommended Operating Conditions

Parameter

Symbol

Conditions

Min

2.4

Typ

2.7

Max

Unit

Supply Voltage Range

Output Voltage Range

Ambient Temperature

V_DD

4.5

V_OUT

-0.3

-40

℃

Table 3. Recommended Operating Conditions

Electrical Characteristics (Ta=25℃unless otherwise specified）

Parameter

Symbol Conditions Min Typ Max

Static Parameter

Unit

Average Supply Current

Supply Current(operating mode)

Supply Current(stand-by mode)

Output Saturation Voltage

Output Leakage Current

I_DD

I_ON

V_DD=2.7V

I_OUT=2mA

V_OUT=5.0V

V_DD=2.7V

1.1

2.5

0.1

0.01

Ist

V_SAT

I_LEAK

T_ON

T_OFF

Time of operating mode

Time of stand-by mode

Magnetic Characteristics

SDC8312

Operating Point

Release Point

Hysteresis

B_OP

B_RP

B_HY

V_DD=3.3V

SDC8312A

Operating Point

Release Point

Hysteresis

B_OP

B_RP

B_HY

V_DD=3.3V

Table 4. Electrical Characteristics

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Data sheet

MicroPower Hall-Effect Switch

SDC8312/SDC8312A

Typical Performance Characteristics

Figure 3. Average current vs ambient temperature

Figure 4. Average current vs supply voltage

（V_DD=2.7V）

（Ta=25℃）

Magnetic Characteristics

Figure 5. Magnetic Characteristics

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Data sheet

MicroPower Hall-Effect Switch

Typical Application

SDC8312/SDC8312A

Figure 6. Typical Application

Function Description

Power On Reset

Bias Generator

Used to detect the power-up ramp and reset the

digital circuits to attain correct operation as soon

as the power is ready.

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.

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

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.

clocking

scheme,

the

average

power

consumption is almost equal to the stand-by

mode, which is under 10 uW at 2.7V.

Hysteresis Control

This block determines the switching threshold of

the Hall switch in different situations.

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Data sheet

MicroPower Hall-Effect Switch

SDC8312/SDC8312A

Package Dimension

SOT-23-3

Dimensions in millimeters

Dimensions in inches

Symbol

Min

Max

1.150

0.100

1.050

0.500

0.150

3.000

1.400

2.550

Min

Max

0.045

0.004

0.041

0.020

0.006

0.118

0.055

0.100

0.900

0.000

0.900

0.300

0.080

2.800

1.200

2.250

0.035

0.000

0.035

0.012

0.003

0.110

0.047

0.089

0.950 TYP

0.550 REF

0.037 TYP

0.022 REF

1.800

2.000

0.071

0.079

0.300

0°

0.500

8°

0.012

0°

0.020

6°

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Data sheet

MicroPower Hall-Effect Switch

TO-92S

SDC8312/SDC8312A

Marth,2013 Rev1.2

○2013 Shaoxing Devechip Microelectronics Co.,Ltd

7/7

www.sdc-semi.com

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