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Si1133 UV Index and Ambient Light Sensor with I2C Interface

Our Si1133 solutions are UV Index and ambient light sensors with I²C digital interface and programmable-event interrupt output. These sensor ICs include dual 23-bit analog-to-digital converters, integrated high-sensitivity array of UV, visible and infrared photodiodes and a digital signal processor. 

The Si1133 is provided in a 10-lead 2x2 mm QFN package and capable of operation from 1.62 to 3.6 V over the –40 to +85 °C temperature range.

Supply voltage
1.62 to 3.6 V
Temperature range
-40 to +85 °C

Si1133 Optical Sensor Common Specs

  • Optional high accuracy UV index sensor
    • Unique on-die filter closely matches erythermal curve
  • Ambient light sensor
    • < 100 mix resolution possible, allowing operation under dark glass
    • Up to 128 kix 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
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