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| 型号： | TSL2569T |
| 厂商： | AMS-TAOS USA Inc |
| 文件页数： | 27/37页 |
| 文件大小： | 785K |
| 描述： | IC LIGHT TO DGTL CONV 6-TMB |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | TSL2569-TDKR |
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TSL2568, TSL2569
LIGHT-TO-DIGITAL CONVERTER
TAOS091D DECEMBER 2008
26
r
r
Copyright E 2008, TAOS Inc.
The LUMENOLOGY r Company
www.taosinc.com
APPLICATION INFORMATION: HARDWARE
Power Supply Decoupling and Application Hardware Circuit
The power supply lines must be decoupled with a 0.1 糉 capacitor placed as close to the device package as
possible (Figure 16). The bypass capacitor should have low effective series resistance (ESR) and low effective
series inductance (ESI), such as the common ceramic types, which provide a low impedance path to ground
at high frequencies to handle transient currents caused by internal logic switching.
TSL2568/
TSL2569
V
BUS
V
DD
0.1 mF
R
P
R
P
SCL
SDA
R
PI
INT
Figure 16. Bus Pull-Up Resistors
Pull-up resistors (Rp) maintain the SDAH and SCLH lines at a high level when the bus is free and ensure the
signals are pulled up from a low to a high level within the required rise time. For a complete description of the
SMBus maximum and minimum Rp values, please review the SMBus Specification at
http://www.smbus.org/specs. For a complete description of I
2
C maximum and minimum Rp values, please
review the I
2
C Specification at http://www.semiconductors.philips.com.
A pull-up resistor (R
PI
) is also required for the interrupt (INT), which functions as a wired-AND signal in a similar
fashion to the SCL and SDA lines. A typical impedance value between 10 k?and 100 k?can be used. Please
note that while Figure 16 shows INT being pulled up to V
DD
, the interrupt can optionally be pulled up to V
BUS
.
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