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TSL237 - High-Sensitivity Light-to-Frequency Converter

Description

The TSL237 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter on a single monolithic CMOS integrated circuit.

Output is a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance) on the photodiode.

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TSL237 High-Sensitivity Light-to-Frequency Converter General Description The TSL237 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter on a single monolithic CMOS integrated circuit. Output is a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance) on the photodiode. The digital output allows direct interface to a microcontroller or other logic circuitry. The device has been temperature compensated for the ultraviolet-to-visible light range of 320nm to 700nm and responds over the light range of 320nm to 1050nm. The TSL237 is characterized for operation over the temperature range of -40°C to 85°C and is supplied in a 3-lead clear plastic side-looker package with an integral lens.
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