參數(shù)資料
型號(hào)： THS7375IPWG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： VIDEO AMPLIFIER, PDSO14
封裝： GREEN, PLASTIC, TSSOP-14
文件頁數(shù)： 18/39頁
文件大?。?/td> 973K
代理商： THS7375IPWG4
75 W
Y'/G'Out
CVBS/Sync
CVBS
+3.3V
R
DAC/Encoder
SDTV
CVBS
S-Video
Y'P' P'
R'G'B'
B
R
Y'/G'
R
P' /B'
B
R
P' /R'
R
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CH1OUT
CH2OUT
CH3OUT
CH4OUT
V
S+
BYPASS
NC
CH1IN
CH2IN
CH3IN
CH4IN
GND
DISABLE
NC
THS7375
ToGPIOController
orGND
75 W
P’ /B'Out
B
75 W
P’ /R'Out
R
75 W
+3Vto+5V
0.1 F
m
(1)
0.1 F
m
(1)
0.1 F
m
(1)
0.1 F
m
(1)
R
PU
+3.3V
R
PU
330 F
m
(2)
+
75 W
CVBSOut1
75 W
330 F
m
(2)
+
75 W
Y'Out1
75 W
330 F
m
(2)
+
75 W
P' Out1
B
75 W
330 F
m
(2)
+
75 W
P' Out1
R
75 W
330 F
m
(2)
+
330 F
m
(2)
+
330 F
m
(2)
+
330 F
m
(2)
+
www.ti.com
SBOS449A – SEPTEMBER 2008 – REVISED JANUARY 2011
OUTPUT MODE OF OPERATION:
This
configuration
helps
ensure
line-to-line
dc
AC-COUPLED
isolation and avoids the potential problems discussed
above. Using a single 1000-mF capacitor for two lines
A very common method of coupling the video signal
can be done, but there is a chance for interference to
to the line is the use of a large capacitor. This
be created between the two receivers.
capacitor is typically between 220 mF and 1000 mF,
although 470 mF is very common. The value of this
Lastly, because of the edge rates and frequencies of
capacitor must be large enough to minimize the line
operation, it is recommended (but not required) to
tilt (droop) and/or field tilt associated with ac coupling
place a 0.1-mF to 0.01-mF capacitor in parallel with
as
described
previously
in
this
document.
AC
the large 220-mF to 1000-mF capacitor. These
coupling is done for several reasons, but most often
large-value
capacitors
are
generally
aluminum
to ensure full interoperability with the receiving video
electrolytic. It is well-known that these capacitors
system. AC coupling also ensures adherence to video
have significantly large equivalent series resistance
standard specifications. It ensures that regardless of
(ESR), and the impedance at high frequencies is
the reference dc voltage used on the transmit side,
rather large because of the associated inductances
the receive side re-establishes the dc reference
involved with the leads and construction. The small
voltage to its own requirements.
0.1-mF
to
0.01-mF
capacitors
help
pass
these
high-frequency (> 1-MHz) signals with much lower
As with the dc output mode of operation discussed
impedance than the large capacitors.
previously, each line should have a 75-
source
termination resistor in series with the ac coupling
Although it is common to use the same capacitor
capacitor. If two lines are to be driven, it is best to
values for all the video lines, the frequency bandwidth
have each line use its own capacitor and resistor
of the chroma signal in a S-Video system are not
rather than sharing these components, as shown in
required to go as low (or as high of a frequency) as
the luma channels. Thus, the capacitor values of the
chroma line(s) can be smaller, such as 0.1 mF.
(1) An ac-coupled input is shown in this example. DC coupling is also allowed as long as the DAC output voltage is within the allowable
linear input and output voltage range of the THS7375. To dc-couple, remove the 0.1-mF input capacitors and RPU.
(2) An ac-coupled output is shown in this example. DC coupling is also allowed by simply removing these capacitors.
Figure 53. Typical SDTV AC-Input System Driving Two AC-Coupled Video Lines
Copyright 2008–2011, Texas Instruments Incorporated
25
Product Folder Link(s): THS7375
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS7375IPWR 功能描述:視頻放大器 4Ch SDTV Video Amp RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel
THS7375IPWRG4 功能描述:視頻放大器 4Ch SDTV Video Amp w/6th order fltr RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel
THS7376 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-Channel Video Amplifier with One SD and Three HD 8th-Order Filters with 6-dB Gain
THS7376IPW 制造商:Texas Instruments 功能描述:4-Channel Video Amplifier 1SD 3HD 制造商:Texas Instruments 功能描述:IC SDTV VIDEO AMP 4-CH 14-TSSOP
THS7376IPWR 制造商:Texas Instruments 功能描述:4-Channel Video Amplifier 1SD 3HD
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