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參數(shù)資料
| 型號： | THS7315D |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 6/25頁 |
| 文件大?。?/td> | 2376K |
| 代理商： | THS7315D |
www.ti.com
OUTPUT MODE OF OPERATION—AC-COUPLED
75 W
+
75 W
+
75 W
+
75 W
+
Y’
OUT2
75 W
+
Y’
OUT1
75 W
+
5
8
7
6
1
2
3
4
Y’
P’
B
P’
R
+
R
+1.8V
R
+1.8V
+3.3V
9.31MW
0.1 F
m
0.1 F
m
0.1 F
m
0.1 F
m
22 F
m
V
S+
GND
CH.2IN
CH.3IN
CH.1IN
CH.3OUT
CH.2OUT
CH.1OUT
DAC/
Encoder
+3.3V
+1.8V
330 F
m
(1)
330 F
m
(1)
330 F
m
(1)
330 F
m
(1)
330 F
m
(1)
330 F
m
(1)
SDTV
480i/576i
Y’P’ P’
G’B’R’
B
R
THS7315
P’
B
P’
B
P’
R
P’
R
SLOS532 – JUNE 2007
APPLICATION INFORMATION (continued)
The most common method of coupling the video signal to the line is through the use of a large capacitor. This
capacitor is typically between 220
μF and 1000 μF, although 330 μF is very common. The value of this capacitor
must be this large to minimize the line tilt (droop) and/or field tilt associated with ac coupling as discussed
previously in this document. AC coupling is done for several reasons; generally, it is done to ensure full
interoperability with the receiving video system. This coupling eliminates possible ground loops. It also ensures
that regardless of the reference dc voltage used on the transmit side, the receive side will re-establish the dc
reference voltage to its own requirements.
In the same way that the dc output mode of operation is configured (as discussed earlier), each line should have
a 75-
source termination resistor in series with the ac-coupling capacitor. If driving two lines, it is best to have
each line use its own capacitor and resistor rather than sharing these components, as Figure 9 shows. This
configuration helps ensure line-to-line dc isolation and avoids the potential problems discussed earlier. Using a
single 1000-
μF capacitor for two lines can be done, but there is a chance for ground loops and additional
interference to be created between the two receivers.
(1)
As a result of the high frequency content of the video signal, it is recommended, but not required, to add a 0.1-
μF or
0.01-
μF capacitor in parallel with these large capators.
(2)
Current sinking DAC / Encoder shown. See the application notes.
Figure 9. Typical 480i/576i Y'P'BP'R AC-Input System Driving Two AC-Coupled Video Lines
14
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| THS7315DG4 | 功能描述:視頻放大器 3-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 |
| THS7315DR | 功能描述:視頻放大器 3-Ch SDTV 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 |
| THS7315DRG4 | 功能描述:視頻放大器 3-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 |
| THS7315EVM | 功能描述:放大器 IC 開發(fā)工具 THS7315 Eval Mod RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| THS7316 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-Channel HDTV Video Amplifier With 5th-Order Filters and 6-dB Gain |
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