TSL235R

Light-to-Frequency Converter - The TSL235 Light-to-Frequency Converter combines a silicon photodiode and a current-to-frequency converter on a single monolithic CMOS integrated circuit. The output is a square wave (50% duty cycle) with frequency directly proportional to light intensity. Because it is TTL compatible, the output allows direct interface to a microcontroller or other logic circuitry. the TSL235R is characterized for operation over the temperature range of -25 degrees C to 70 degrees C.