Proximity/Ambient Light Sensor IC with I2C Interface

The Si115x-AB00/AB09/AB9x is an ambient light sensor, proximity, and gesture detector with I2C digital interface and programmable-event interrupt output.
This touchless sensor IC includes dual 23-bit analog-to-digital converters, an integrated high-sensitivity array of visible and infrared photodiodes, a digital signal processor, and up to three integrated LED drivers with programmable drive levels. The Si115x offers excellent performance under a wide dynamic range and a variety of light sources, including direct sunlight. The Si115x can also work under dark glass covers. 

KEY FEATURES
• Proximity detector
   • From under 1 cm, to 50 cm without
      additional lensing.
   • From under 1 cm, to 200 cm with
      additional lensing (e.g., 5 mm
      hemispherical lens as in our EVB).
   • Up to three independent LED drivers.
   • 30 current settings from 5.6 mA to 360
      mA for each LED driver.
   • Operates in direct sunlight with optional
      on-die 940 nm passband filter.
   • On die 940 bandpass filter that rejects
      unwanted visible light and IR from
      daylight and other sources (Si115xAB09/AB9X).
• 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.
   • 9 μA average current (LED pulsed 24.4
      μs every 800 ms at 180 mA plus 3 μA
      Si115x supply).
   • <500 nA standby current.
   • 24.4 μs LED “on” time keeps total power
      consumption duty cycle low without
      compromising performance or noise
      community.
   • Internal and external wake support.
   • Built-in voltage supply monitor and
      power-on reset controller.

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