RGB measurement for light source monitoring

Highly configurable RGB sensor ASIC

This is a highly configurable analog RGB sensor controlled through an I2C interface.

The chip consists of area programmable red, green and blue photodiodes connected to an integrating amplifier. Three parallel signal paths make it possible to simultaneously integrate the current from the RGB sensor. The measurement is output from the ASIC as differential voltages.
The application was developed to measure the ageing of light sources, but can be used in any application where an RGB light analysis is needed.

Top technical features:

• RBG array size: 15x15 pixels
• Pixel size: 30µm x 30µm
• Configurable number of red (1-20), green(2-30) and blue(2-40) pixels
• 5 bit programmable integrator reference voltage
• No clock needed
• Asynchronous I2C interface
• Direct timing control from chip pin interface
• Simultaneous measurement sampling for R, G and B.
• Differential output of measurement