SI7005-B-FM 데이터 시트보기 (PDF) - Silicon Laboratories

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SI7005-B-FM

DIGITAL I2C HUMIDITY AND TEMPERATURE SENSOR

Silicon Laboratories 

Si7005

2. Typical Application Circuits

Note: If the Si7005 shares an I2C bus with other slave devices, it should be powered down when the master controller is com-

municating with the other slave devices.

The Si7005 can be powered down either by setting the CS signal to logic high or setting the VDD pin to 0 V. Refer to

Figure 5 for an illustration of this method of powering the Si7005 from an MCU GPIO (the Si7005 VDD is powered from

an MCU port pin).

VDD

SCL

SDA

R1

R2

10K

10K

CSb

GND

C1

4.7uF

1 GND

2 DNC

3 SCL

4 SDA

5 DNC

6 DNC

U1

Si7005

DNC 18

DNC 17

DNC 16

CS 15

DNC 14

DNC 13

C2

0.1uF

Figure 4. Typical Application Circuit

VDD

Port Pin

SCL

SDA

R3

15.0

R1

R2

10K

10K

1 GND

2 DNC

3 SCL

4 SDA

5 DNC

6 DNC

U2

Si7005

DNC 18

DNC 17

DNC 16

CS 15

DNC 14

DNC 13

GND

C1

4.7uF

C2

0.1uF

Figure 5. Typical Application Circuit for Battery-Powered Applications

10

Rev. 1.3

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