TIDA-00754: Smart lighting & backlight control by ambient light & noise-immune proximity sensor


The TIDA-00754 TI Design demonstrates a proximity sensor implementation for HMI applications. The design can be used for backlight control that dynamically adjusts LCD backlight brightness relative to the environment's ambient light levels. A capacitive proximity sensor saves power and increases the LCD backlight life by waking up the system from sleep or standby mode when a person approaches.


  • Demonstrates EMI-resistant proximity detection using copper PCB material

  • Excellent human eye spectral response matching with a strong IR rejection (<1%)

  • Dynamically adjusts backlight brightness on a logarithmic scale based on how the human eye perceives brightness

  • Integrated UV filter enables good performance for outdoor applications


Manufacturer Texas Instruments
Category Sensor Solutions
Sub-Category Other Sensing Solutions
Eval Board Board not Stocked
Purpose Ambient light sensor
Capacitance-to-Digital Converter
Human to device interface
Presence sensing
Proximity Sensing
Range 0 ~ 100% RH
0 ~ 20 cm proximity
0.01 ~ 83,000 lux
-20 ~ 85 C
Sensing Method Ambient Light Sensing
Capacitive Proximity Sensor
Capacitive Sensor
Integrated Temperature Sensor
Voltage In 5 V
Features Ambient Light Adaptive
I²C Interface
MCU Controlled
SPI Interface
UART Interface
USB Interface
Design Author Texas Instruments
Component Count + Extras 88 + 29
Main I.C. Base Part FDC2212
Date Created By Author 2016-05
Date Added To Library 2018-07