Si114x IR Sensor ICs and Evaluation Boards

QuickSense™ Si114x proximity and ambient light sensor ICs from Silicon Labs

Image of Silicon Laboratories' Si114x IR Sensor ICs and Evaluation BoardsThe QuickSense™ Si114x series ICs from Silicon Labs are the industry’s most sensitive and lowest power active infrared proximity and ambient light sensor ICs. The monolithic Si114x family of devices features an all digital I2C control interface and up to three infrared LED drivers in an impressively small 2 mm x 2 mm clear QFN package. Capable of controlling one, two, and three infrared LED systems, developers have the freedom to implement one-dimensional systems with a range of up to 50 cm or multi-dimensional systems capable of advanced motion sensing with a range of up to 15 cm. The robust infrared sensing architecture works in direct sunlight and includes an ambient light sensor capable of sensing light levels up to 128 kLux.

  • Handsets
  • E-book readers
  • Notebooks/Netbooks
  • Tablet PCs
  • Portable consumer electronics
  • Audio products
  • Security products
  • Tamper detection circuits
  • Dispensers
  • Valve control
  • Smoke detectors
  • Touchless switches
  • Touchless sliders
  • Occupancy sensors
  • Consumer electronics
  • Industrial automation
  • Display backlight control
  • Photo interrupters


Key Features Customer Benefits
High sensitivity infrared photodiode
  • Industry leading infrared proximity sensing range of 50 cm
  • Extends battery life by reducing the IR-LED on-time
    to only 25.6 μs
1-, 2- or 3- independently controlled infrared LED drivers
  • Enables 1, 2 and 3-dimensional sensing systems
  • Enables innovative new end-product features like
    the touchless slider
  • Dynamic adjustment of LED currents minimizes
    power consumption
Integrated ambient light photodiode
  • Enables accurate light level monitoring in mixed-light
    source settings
  • Improved user visual experience and reduced
    backlight energy usage
I2C control interface with interrupt
  • Autonomous operation allows system
  • Flexible access to sensing configuration

Eval Boards

ImageManufacturer Part NumberDescriptionSensor TypeAvailable QuantityView Details
BOARD EVAL SI1143-A10-GMSI1140DKBOARD EVAL SI1143-A10-GMProximity, Infrared and Ambient Light1 - ImmediateView Details
BOARD EVAL IR SLIDER SI1142IRSLIDER2EKBOARD EVAL IR SLIDER SI1142Proximity, Infrared2 - ImmediateView Details
Published: 2012-06-29