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


Find the Right Si1133 Device Select Columns
Select Columns
Part Number Description UV Index LEDs Ambient Light Sensor Interface Package Type Package Size (mm) Proximity
UV sensor, improved performance 0 I2C QFN10 2x2

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