TSL245R

Technical coantmesntAsGtill valid r TSL245R INFRARED LIGHT-TO-FREQUENCY CONVERTER r TAOS060D − SEPTEMBER 2007 D High-Resolution Conversion of Light Intensity to Frequency With No External Components D Communicates Directly With a Microcontroller D Compact Three-Leaded Plastic Package D Integral Visible-Light Cutoff Filter D Single-Supply Operation . . . 2.7 V to 5.5 V D High Irradiance Responsivity . . . Typically 500 Hz/(μW/cm2) at 940 nm D Nonlinearity Error Typically 0.2% at 100 kHz D Available in Through-Hole and Surface Mount Three-Lead Sidelooker Packages D Replacement for TSL245 D Lead (Pb) Free Package Option Available PACKAGE S SIDELOOKER (FRONT VIEW) PACKAGE SM SURFACE MOUNT SIDELOOKER (FRONT VIEW) 123 GND VDD OUT 123 GND VDD OUT Description The TSL245R 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 TSL245R is characterized for operation over the temperature range of −25°C to 70°C and is supplied in a 3-lead plastic side-looker package with an integral visible-light cutoff filter and lens. When supplied in the lead (Pb) free package, the devices are RoHS compliant. Functional Block Diagram Light Photodiode Current-to-Frequency Converter Ou...