SI1141(2011) View Datasheet(PDF) - Silicon Laboratories

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Description

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SI1141
(Rev.:2011)

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.

2. Si1143 only.

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: irLED Selection Guide for Si114x Proximity Applications”.

2

Preliminary Rev. 0.5

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