TSL235R

r r D High-Resolution Conversion of Light Intensity to Frequency With No External Components D Communicates Directly With a Microcontroller D Compact Three-Leaded Clear-Plastic Package D Single-Supply Operation Down to 2.7 V D Nonlinearity Error Typically 0.2% at 100 kHz D Stable 150 ppm/°C Temperature Coefficient D Single-Supply Operation D RoHS Compliant (−LF Package Only) TSL235R LIGHT-TO-FREQUENCY CONVERTER PACKAGE S SIDELOOKER (FRONT VIEW) TAOS038E −SEPTEMBER 2007 PACKAGE SM SURFACE MOUNT SIDELOOKER (FRONT VIEW) 123 GND VDD OUT Description 123 GND VDD OUT The TSL235R 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 320 nm to 700 nm and responds over the light range of 320 nm to 1050 nm. The TSL235R is characterized for operation over the temperature range of −25°C to 70°C and is supplied in a 3-lead clear plastic side-looker package with an integral lens. When supplied in the lead (Pb) free package, the device is RoHS compliant. Functional Block Diagram Light Photodiode Current-to-Frequency Converter Output Available Options DEVICE TSL235R TSL235R TSL235R TA...