TCS3200 datasheet(2/25 Pages) OSRAM

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TCS3200

Programmable

Color Light-to-Frequency Converter

The TCS3200 programmable color light-to-frequency converter

combines configurable silicon photodiodes 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

(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 × 8

array of photodiodes. Sixteen photodiodes have blue filters, 16

photodiodes have green filters, 16 photodiodes have red filters,

and 16 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 110μm × 110μm

in size and are on 134μm centers.

Ordering Information and Content Guide appear at end of

datasheet.

Key Benefits & Features

The benefits and features of TCS3200 Programmable Color

Light-to-Frequency Converter are listed below:

Figure 1:

Added Value of Using TCS3200

Benefits

Features

• Enables High-Resolution Conversion of Light

Intensity to Frequency

• Programmable Color Light-to-Frequency Converter

• Disables the Output into a Hi-Impedance State

when OE Input Pin is Low

• Output Enable (OE) Pin

• Enables Output Range to be Optimized for a

Variety of Low-Cost Measurement Techniques

• Output Frequency Scaling

• Reduces Board Space Requirements while

Simplifying Designs

• Available in 5mm x 6.2mm SOIC (D) Package

General Description

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