​Si1132 Ultraviolet (UV) Index and Ambient Light Sensor IC

Si1132 device is not recommended for new designs. For new designs, please use the Si1133 UV Index and Ambient Light Sensor IC with I2C Interface instead.
The monolithic Si1132 sensor integrates multiple photodiodes, an analog-to-digital converter, a signal processor and a digital I2C control interface in an impressively small 2 mm x 2 mm clear QFN package. This UV Index and ambient light sensor enables fitness wrist/arm bands, smart watches, and smartphones to differentiate by measuring UV sun exposure. Customers can benefit by receiving a warning of when their current UV exposure is unhealthy or to determine their cumulative UV exposure during exercise. This measurement is critical for people with an elevated risk of sunburn or anyone who is concerned about their sun exposure.
This low-power sensor enables long battery life with standby less than 500 nA and an average power of as little as 1.2 uA with once per second real-time UV Index measurements. An integrated ambient light sensor enables accurate light level monitoring under mixed lighting and automatic backlight control for improved end user visual experience and reduced backlight energy. The Si114x family is supported within the optical sensor software tools.
 
 

Features

  • Digital UV Index sensor
    • Determine real-time UV sun exposure and cumulative UV sun exposure
  • Ambient light sensor
    • Enables accurate light level monitoring under mixed lighting
    • Automatic backlight control for improved end user visual experience and reduced backlight energy
  • Low-power sensors, signal processer, and ADC enable long battery life
    • As little as 1.2 µA average current with once per second UV Index measurements
    • 1.7 to 3.6 V supply voltage
    • < 500 nA standby current
  • I2C interface for ease of communication with host MCU
  • Tiny 2 mm x 2 mm clear QFN package
  • Operating temperature: – 40 to 85 °C
 
 

Applications

Documentation

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Data Sheet (1)

DescriptionVersionUpdatedSize
Si1132 UV Index and Ambient Light Sensor IC with I2C Interface
1.212/5/2014714 kB

User Guides (4)

Quick Start Guide (1)

DescriptionVersionUpdatedSize
UVIRSlider2EK Si1146 Board Quick-Start Guide
0.12/4/2014147 kB

PCN (2)

Design Tools

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Software (7)

DescriptionVersionUpdatedSize
Manual Install of Sensor Puck Android App
3/30/201524586 kB
Manual install of Sensor Puck Android App
1.14/6/201525545 kB
Sensor Puck
1.03/29/201660 kB
Si114-5x Programmer's Toolkit
3.53/8/2016193363 kB
Si114x Programmer's Toolkit Development Software
2.26/10/2014104053 kB
Si114x Programmer's Toolkit V2.3
V2.36/6/2015139462 kB
UVIrSlider2EK Evaluation Board Demo Software
1.016/10/201431198 kB
Product Matrix
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Part NumberDev KitDescriptionDatasheetUV IndexLEDsGesture/Motion SensingAmbient Light SensorInterfacePackage TypePackage Size
Si1132-A10-GMUVIRSLIDER2EK
UV Index + Ambient Light Sensor
YesYesI2CQFN102x2 mm

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