SI1133 - Silicon Laboratories

SI1133 UV Index/Ambient Light Sensor IC

3. Functional Description The Si1133 is a UV and Ambient Light sensor whose operational state is controlled through registers accessible through the I2C interface. The host can command the Si1133 to initiate on-demand UV or Ambient Light measurement. The host can also place the Si1133 in an autonomous operational state where it performs measurements at set i.

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 silabs.com | Smart. Connected. Energy-friendly. Rev. 0.91 1. Feature List
• High accuracy UV index sensor
• Matches erythermal curve
• Ambient light sensor
• <100 mlx .