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參數(shù)資料
| 型號： | THS7374IPW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 4 CHANNEL, VIDEO AMPLIFIER, PDSO14 |
| 封裝： | GREEN, PLASTIC, TSSOP-14 |
| 文件頁數(shù)： | 17/40頁 |
| 文件大?。?/td> | 929K |
| 代理商： | THS7374IPW |
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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
THS7374
ToGPIOController
orGND
75 W
P' /B'Out
B
75 W
P' /R'Out
R
75 W
+3Vto+5V
SLOS590B – JULY 2008 – REVISED JANUARY 2011
www.ti.com
OUTPUT MODE OF OPERATION: DC
care must be taken to ensure that the junction
COUPLED
temperature does not exceed this level; otherwise,
long-term
reliability
could
suffer.
Although
this
The THS7374 incorporates a rail-to-rail output stage
configuration only adds less than 10 mW of power
that can be used to drive the line directly without the
dissipation
per
channel,
the
overall
low-power
need for large ac coupling capacitors, as shown in
dissipation
of
the
THS7374
design
minimizes
Figure 61. This approach offers the best line tilt and
potential thermal issues even when using the TSSOP
field tilt (or droop) performance because no ac
package at high ambient temperatures.
coupling occurs. Keep in mind that if the input is
ac-coupled, then the resulting tilt because of the input
Note that the THS7374 can drive the line with dc
ac coupling is seen on the output regardless of the
coupling regardless of the input mode of operation.
output coupling. The 80-mA output current drive
The only requirement is to make sure the video line
capability of the THS7374 was designed to drive two
has
proper
termination
in
series
with
the
video lines simultaneously (essentially, a 75-
load)
output—typically 75-
. This termination helps isolate
while maintaining as wide an output dynamic range
capacitive loading effects from the THS7374 output.
as possible.
Failure to isolate capacitive loads may result in
instabilities with the output buffer, potentially causing
One concern of dc coupling, however, arises if the
ringing
or
oscillations
to
appear.
The
stray
line is terminated to ground. If the ac-bias input
capacitance appearing directly at the THS7374 output
configuration is used, the output of the THS7374 has
pins should be kept below 20-pF. The best way to
a dc bias on the output. With two lines terminated to
ensure this limit is maintained is to place the 75-
ground, this configuration creates a dc current path
series output resistor as close as possible to the
that results in a slightly decreased high output voltage
output pin. If an output capacitor is used, as
swing and an increase in power dissipation of the
discussed in the next section, then it should be
THS7374. While the THS7374 was designed to
placed after the resistor.
operate with a junction temperature of up to +125°C,
Figure 61. Typical SDTV System with DC-Coupled Line Driving
24
Copyright 2008–2011, Texas Instruments Incorporated
Product Folder Link(s): THS7374
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| THS7374IPWG4 | 4 CHANNEL, VIDEO AMPLIFIER, PDSO14 |
| THS7374IPWRG4 | 4 CHANNEL, VIDEO AMPLIFIER, PDSO14 |
| THS7375IPWR | VIDEO AMPLIFIER, PDSO14 |
| THS7375IPW | VIDEO AMPLIFIER, PDSO14 |
| THS7375IPWG4 | VIDEO AMPLIFIER, PDSO14 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THS7374IPW | 制造商:Texas Instruments 功能描述:Video Buffer / Amplifier IC 制造商:Texas Instruments 功能描述:IC, VIDEO AMPLIFIER, QUAD 9.5MHZ TSSOP14 |
| THS7374IPWG4 | 功能描述:視頻放大器 4-Ch 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 |
| THS7374IPWR | 功能描述:視頻放大器 4-Ch SDTV Component & Composite Vid 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 |
| THS7374IPWRG4 | 功能描述:視頻放大器 4-Ch 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 |
| THS7375 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-Channel SDTV Video Amplifier with 6th-Order Filters and 5.6-V/V Gain |
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