TCS3471 Datasheet, PDF (18/23 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – COLOR LIGHT-TO-DIGITAL CONVERTER

TCS3471
COLOR LIGHT-TO-DIGITAL CONVERTER
APPLICATION INFORMATION: HARDWARE
TAOS115 − MARCH 2011
Typical Hardware Application
A typical hardware application circuit is shown in Figure 11. A 1-μF low-ESR decoupling capacitor should be
placed as close as possible to the V_DD pin.
V_DD
V_BUS
alid ^{1 mF}
V_DD
R_P
R_P
R_PI
TCS3471 _INT
GND
SCL
SDA
v _{Figure 11. Typical Application Hardware Circuit}
ill ^{VBUS in Figure 11 refers to the I2C bus voltage, which is either VDD or 1.8 V. Be sure to apply the specified I2C}
bus voltage shown in the Available Options table for the specific device being used.
t _{The I2C signals and the Interrupt are open-drain outputs and require pull-up resistors. The pull-up resistor (RP)}
G _{s value is a function of the I}2_{C bus speed, the I}2_{C bus voltage, and the capacitive load. The TAOS EVM running}
at 400 kbps, uses 1.5-kΩ resistors. A 10-kΩ pull-up resistor (R_PI) can be used for the interrupt line.
s ^{A nt PCB Pad Layout}
e Suggested PCB pad layout guidelines for the Dual Flat No-Lead (FN) surface mount package are shown in
m ^{t Figure 12.}
a ^{n Note: Pads can be}
extended further if hand
o soldering is needed.
l ^{c 650}
ica ⁶⁵⁰
1000
2500
1000
400
1700
400
hn NOTES: A. All linear dimensions are in micrometers.
B. This drawing is subject to change without notice.
Tec ^{Figure 12. Suggested FN Package PCB Layout}
The LUMENOLOGY r Company
r
r
www.taosinc.com
Copyright E 2011, TAOS Inc.
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