UV INDEX AND AMBIENT LIGHT SENSOR IC - Silicon Laboratories
Description
Si1132
UV INDEX AND AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE
Features
Integrated UV index sensor
Industry's lowest power
Digital UV Index register that can consumption
be read through I2C interface
1.
71 to 3.
6 V supply voltage
Factory calibration to address
< 500 nA standby current
part-to-part variation
Internal and external wake support
Integrated ambient light sensor
Built-in voltage supply monitor and
100 mlx resolution possible,
power-on reset controller
allowing operation under dark I2C Serial communications
glass
Up to 3.
4 Mbps data rate
1 to 128 klx dynamic range
Slave mode hardware address
possible across two ADC range
decoding
settings
Small-outline 10-lead 2x2 mm
Accurate lux measurements with
QFN
IR correction algorithm
Temperature Range
–40 to +85 °C
Applications
Fitness/health electronics Smart watches Smartphone handsets
Description
Tablets Portable consumer electronics Display-backlighting control
The Si1132 is a low-power, ultraviolet (UV) index, and ambient light sensor with I2C digital interface and programmable-event interrupt output.
This sensor IC includes an analog-to-digital converter, integrated highsensitivity visible and infrared photodiodes, and digital signal processor.
The Si1132 offers excellent performance under a wide dynamic range and a variety of light sources including direct sunlight.
The Si1132 can also work under dark glass covers.
The photodiode response and associated digital conversion circuitry provide excellent immunity to artificial light flicker noise and natural light flutter noise.
The Si1132 devices are provided in a 10-lead 2x2 mm QFN package and are capable of operation from 1.
71 to 3.
6 V over the –40 to +85 °C temperature range.
Pin Assignments
SDA SCL VDD INT
DNC
10 1
9
28
QFN-10
37
46 5
DNC
VDD GND
VDD VDD
Rev.
1.
2 12/14
Copyright © 2014 by Silicon Laboratories
Si1132
Si1132
Functional Block Diagram
VDD
Regulator
Tem...
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