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TCS3103, TCS3104
LIGHT-TO-VOLTAGE COLOR SENSOR
TAOS108B − JULY 2010
D
Three-Channel RGB Color Sensor
D
Converts Light Intensity to Voltage
D
Single-Voltage Supply Operation —
4.5 V to 5.5 V
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
V
DD
1
GND 2
MFP 3
6 V
OR
5 V
OG
4 V
OB
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Rail-to-Rail Output
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Programmable gain settings:
− TCS3103 (2
y
, 4
y
)
− TCS3104 (4
y
, 1
y
)
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Low Supply Current — 270
mA
Typical
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Fast Response Time —
Rise Time = 12
ms
Typical
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Low Dark Offset
Description
The TCS3103 and TCS3104 RGB Light-to-Voltage Converters combine three photodiodes with optical filters,
amplifiers, and gain-switching circuitry on a single chip. The output of each channel is a voltage that is linearly
proportional to light intensity (irradiance) on the corresponding photodiode element. Gain is switchable via a
digital input pin from 1
×
to 4
×
on the TCS3104, and from 2
×
to 4
×
on the TCS3103 (as compared to 1
×
of
TCS3104).
Each channel on the device consists of a photodiode with a red, green, or blue optical filter, a current-to-voltage
converter, and gain control elements. The voltage from each of the red, green, and blue channels is output on
the V
OR
, V
OG
, and V
OB
pins, respectively. The single MFP pin controls the gain for all three channels. Each of
the three photodiode channels is split into three elements, which are dispersed in a 3
×
3 array. This makes the
device less sensitive to non-uniform illumination across the sensing area. The overall photodiode active area
is 378
μm
×
378
μm.
Each channel is factory-trimmed for low dark offset voltage and uniform sensitivity from
device-to-device.
The TCS3103 and TCS3104 are intended for use in a variety of applications including color-point feedback
control in solid-state illumination and backlight systems, color adjustment in printers, process controls,
diagnostic systems, paper and product handling, toys, and games.
Functional Block Diagram
V
OR
Red
Channel
Green
Channel
Blue
Channel
V
OG
Current-to-Voltage
Converter
V
OB
V
DD
= 4.5 V to 5.5 V
MFP
Control
The
LUMENOLOGY
r
Company
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road
S
Suite 300
S
Plano, TX 75074
S
(972) 673-0759
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www.taosinc.com
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Copyright
E
2010, TAOS Inc.
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
