TCS3200 datasheet(13/25 Pages) OSRAM

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[v1-01] 2018-Mar-14

TCS3200 − Application Information

Power Supply Considerations

Power supply lines must be decoupled by a 0.01μF to 0.1μF

capacitor with short leads mounted close to the device

package.

Input Interface

A low-impedance electrical connection between the device

OE pin and the device GND pin is required for improved noise

immunity. All input pins must be either driven by a logic signal

or connected to VDD or GND - they should not be left

unconnected (floating).

Output Interface

The output of the device is designed to drive a standard TTL or

CMOS logic input over short distances. If lines greater than

12 inches are used on the output, a buffer or line driver is

recommended.

A high state on Output Enable (OE) places the output in a

high-impedance state for multiple-unit sharing of a

microcontroller input line.

Power Down

Powering down the sensor using S0/S1 (L/L) will cause the

output to be held in a high-impedance state. This is similar to

the behavior of the output enable pin, however powering down

the sensor saves significantly more power than disabling the

sensor with the output enable pin.

Photodiode Type (Color) Selection

The type of photodiode (blue, green, red, or clear) used by the

device is controlled by two logic inputs, S2 and S3 (see Figure 5).

Output Frequency Scaling

Output-frequency scaling is controlled by two logic inputs,

S0 and S1. The internal light-to-frequency converter generates

a fixed-pulsewidth pulse train. Scaling is accomplished by

internally connecting the pulse-train output of the converter

to a series of frequency dividers. Divided outputs are 50%-duty

cycle square waves with relative frequency values of 100%, 20%,

and 2%. Because division of the output frequency is

accomplished by counting pulses of the principal internal

frequency, the final-output period represents an average of the

multiple periods of the principle frequency.

The output-scaling counter registers are cleared upon the next

pulse of the principal frequency after any transition of the

S0, S1, S2, S3, and OE lines.

Application Information

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