TSL235R Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – LIGHTTOFREQUENCY CONVERTER

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 150 ppm/°C Temperature Coefficient
D Single-Supply Operation
TSL235R
LIGHTĆTOĆFREQUENCY CONVERTER
PACKAGE
(FRONT VIEW)
TAOS038 – APRIL 2002
1 23
GND V_DD OUT
Description
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.
Functional Block Diagram
Light
Photodiode
Current-to-Frequency
Converter
Output
The LUMENOLOGYr Company
t
Texas Advanced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205 S Plano, TX 75074 S (972_t) 673-0759
www.taosinc.com
Copyright E 2002, TAOS Inc.
1