TCS3200, TCS3210

PROGRAMMABLE

COLOR LIGHT-TO-FREQUENCY CONVERTER

TAOS099A − AUGUST 2011

1

The LUMENOLOGY

r Company

r

r

Copyright

E 2011, TAOS Inc.

www.taosinc.com

Intensity to Frequency

Frequency

Compliant Surface-Mount Package

Description

The TCS3200 and TCS3210 programmable color

light-to-frequency converters that combine confi-

gurable silicon photodiodes and a current-to-fre-

quency converter on a single monolithic CMOS

integrated circuit. The output is a square wave

(50% duty cycle) with frequency directly propor-

tional 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-unit sharing of a microcontroller input line.

In the TCS3200, the light-to-frequency converter reads an 8

blue filters, 16 photodiodes have green filters, 16 photodiodes have red filters, and 16 photodiodes are clear

with no filters.

In the TCS3210, the light-to-frequency converter reads a 4

filters, 6 photodiodes have green filters, 6 photodiodes have red filters, and 6 photodiodes are clear with no

filters.

The four types (colors) of photodiodes are interdigitated to minimize the effect of non-uniformity of incident

irradiance. All photodiodes of the same color are connected in parallel. Pins S2 and S3 are used to select which

group of photodiodes (red, green, blue, clear) are active. Photodiodes are 110

μm

134-

μm centers.

Functional Block Diagram

Light

Current-to-Frequency

Converter

Photodiode

Array

S2

S3

S0

S1

OE

Output

r

r

Texas Advanced Optoelectronic Solutions Inc.

1001 Klein Road

S Suite 300 S Plano, TX 75074 S (972) 673-0759

8 S3

7 S2

6 OUT

PACKAGE D

8-LEAD SOIC

(TOP VIEW)

S0 1

S1 2

OE 3

GND 4

8 S3

7 S2

6 OUT

TCS3200

S0 1

S1 2

OE 3

GND 4

TCS3210