TCS230_光电感应.pdfVIP

TAOS046 – JANUARY 2003 High-Resolution Conversion of Light SOIC PACKAGE Intensity to Frequency (TOP VIEW) Programmable Color and Full-Scale Output SO 1 8 S3 Frequency Communicates Directly With a Microcontroller S1 2 7 S2 Single-Supply Operation (2.7 V to 5.5 V) OE 3 6 OUT Power Down Feature Nonlinearity Error Typically 0.2% at 50 kHz GND 4 5 VDD Stable 200 ppm/°C Temperature Coefficient Low-Profile Surface-Mount Package Description The TCS230 programmable color light-to-frequency converter combines configurable silicon photodiodes and a current-to-frequency converter on single monolithic CMOS integrated circuit. The output is a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance). The full-scale output frequency can be scaled by one of three preset values via two control input pins. Digital inputs and digital output allow direct interface to a microcontroller or other logic circuitry. Output enable (OE) places the output in the high-impedance state for multiple-u