SI1142 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

SI1142

PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE

Silicon Laboratories 

Si1141/42/43

Functional Block Diagram

VDD

INT

SCL

SDA

Regulator

Temp

A

M

U

Visible

X

Infrared

ADC

Filter

LED

Drivers

Digital Sequencer & Control Logic

I2C

Registers

Oscillator

LED1

LED21

LED32

GND

1. Si1142 and Si1143 only. Must be tied to VDD with Si1141.

2. Si1143 only. Must be tied to VDD with Si1141 and Si1142.

3.3 V

Host

SDA

SCL

INT

0.1 uF

Si1141

SDA

LED1

SCL

GND

VDD CVDD

INT CVDD

30 ohm

5%, 1/16 W

15 µF, 20%, >6 V

3.3 V

Host

Figure 1. Si1141 Basic Application

4.3 V

No

Pop

Si1143

SDA

LED1

SCL

GND

VDD

LED3

INT

LED2

0.1 uF

30 ohm

5%, 1/16 W

22 uF, 20%, >6V

Figure 2. Si1143 Application with Three LEDs and Separate LED Power Supply

Note: For more application examples, refer to “AN498: Si114x Designer’s Guide”.

2

Rev. 1.4

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