Light to Frequency

Light to Frequency sensors perform the functions of light sensing, signal conditioning, and A/D conversion in a single monolithic IC. The device converts light intensity to a digital format to interface directly to a microcontroller. The output is a square wave or pulse train whose frequency is linearly proportional to light intensity and features a dynamic range of 120dB. The programmable Light to Frequency converter has an input dynamic range of 160 dB through an adjustable input sensitivity and an output scaling control down to 100x to slow down the cycle period.

Light to Frequency sensors are designed for applications such as ambient light measurement, light absorption/reflection in products such as white goods, photographic equipment, colorimetry, chemical analyzers and display contrast controls or any system requiring a wide dynamic range and/or high resolution digital measurement of light intensity.

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