ams TSL2541 Light-to-Digital Sensor is a very high-sensitive light-to-digital converter that transforms light intensity into a digital signal output capable of a direct I²C interface. This Ambient Light Sensing (ALS) sensor features 2-output channels, a visible channel, and an IR channel. The visible channel has a photodiode with a UV and IR blocking filter and the IR channel has a photodiode with an IR pass filter. The TSL2541 sensor is ideal for ALS and display backlight control.