Data Sheet

ams Datasheet Page 13
[v1-00] 2016-Jul-13 Document Feedback
TCS3200, TCS3210 − 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