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t
t
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 100 ppm/°C Temperature Coefficient D Single-Supply Operation
TSL235 LIGHTĆTOĆFREQUENCY CONVERTER
SR PACKAGE (FRONT VIEW)
TAOS003 – MAY 1999
1 23
Description
GND VDD OUT
The TSL235 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter
on a single monolithic CMOS integrated circuit. The output is a square wave (50% duty cycle) with frequency
directly proportional to light intensity.