UV Index/Ambient Light Sensor IC with I2C Interface

The Si1133 is a UV Index Sensor and Ambient Light Sensor with I2C digital interface and programmable-event interrupt output. This sensor IC includes dual 23-bit analog-to-digital converters, integrated high-sensitivity array of UV, visible and infrared photodiodes, and digital signal processor. The Si1133 is provided in a 10-lead 2x2 mm DFN package and capable of operation from 1.62 to 3.6 V over the –40 to +85 °C temperature range.

KEY FEATURES
• High accuracy UV index sensor (0 to > 20
   uV)
   • Matches erythermal curve
• Ambient light sensor
   • <100 mlx resolution possible, allowing
      operation under dark glass
   • Up to 128 klx dynamic range possible
      across two ADC range settings
• Industry’s lowest power consumption
   • 1.62 to 3.6 V supply voltage
   • <500 nA standby current
   • Internal and external wake support
   • Built-in voltage supply monitor and
      power-on reset controller

APPLICATIONs
• Wearables
• Handsets
• Display backlighting control
• Consumer electronics