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參數資料
型號: THS7372IPWR
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: 22/49頁
文件大小: 1768K
代理商: THS7372IPWR
+V
S
External
Input/Output
Pin
Internal
Circuitry
75 W
Y'/G’ Out
CVBSOut
CVBS
37.4 W
Y'/G'
37.4 W
P’ /B'
B
37.4 W
P’ /R'
R
37.4 W
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CVBSOUT
DISCVBS
GND
DISFHD
FHD1OUT
FHD2OUT
FHD3OUT
CVBSIN
NC
V
S+
NC
FHD1IN
FHD2IN
FHD3IN
THS7372
+2.7Vto
+5V
75 W
Disable
CVBS
Disable
FHD
SOC/DAC/Encoder
75 W
P' /B’ Out
B
75 W
P' /R’ Out
R
75 W
SBOS578
– AUGUST 2011
INPUT OVERVOLTAGE PROTECTION
The THS7372 is built using a very high-speed, complementary, bipolar, and CMOS process. The internal junction
breakdown voltages are relatively low for these very small geometry devices. These breakdowns are reflected in
the Absolute Maximum Ratings table. All input and output device pins are protected with internal ESD protection
diodes to the power supplies, as shown in Figure 83.
Figure 83. Internal ESD Protection
These diodes provide moderate protection to input overdrive voltages above and below the supplies as well. The
protection diodes can typically support 30 mA of continuous current when overdriven.
TYPICAL CONFIGURATION AND VIDEO TERMINOLOGY
A typical application circuit using the THS7372 as a video buffer is shown in Figure 84. It shows a DAC or
encoder driving the input channels of the THS7372. The SD channel (CVBS IN pin) can be used for NTSC, PAL,
or SECAM signals. The other three channels are the component video Y
’/P’B/P’R (sometimes labeled Y’U’V’ or
incorrectly labeled Y
’/C’B/C’R) signals. These signals are typically 480i, 576i, 480p, 576p, 720p, 1080i, or up to
1080p60 signals.
Note that the Y
’ term is used for the luma channels throughout this document rather than the more common
luminance (Y) term. This usage accounts for the definition of luminance as stipulated by the International
Commission on Illumination (CIE). Video departs from true luminance because a nonlinear term, gamma, is
added to the true RGB signals to form R
’G’B’ signals. These R’G’B’ signals are then used to mathematically
create luma (Y
’). Thus, luminance (Y) is not maintained, providing a difference in terminology.
Figure 84. Typical Four-Channel System Inputs from DC-Coupled Encoder/DAC with
DC-Coupled Line Driving
Copyright
2011, Texas Instruments Incorporated
29
相關PDF資料
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相關代理商/技術參數
參數描述
THS7372PWEVM 功能描述:放大器 IC 開發工具 THS7372 EVAL MOD RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V
THS7373 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-Channel Video Amplifier with 1-SD and 3-HD Sixth-Order Filters and 6-dB Gain
THS7373_10 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-Channel Video Amplifier with 1-SD and 3-HD Sixth-Order Filters and 6-dB Gain
THS7373EVM 功能描述:放大器 IC 開發工具 THS7373EVM Eval Mod RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V
THS7373IPW 功能描述:視頻放大器 4-Ch Video Amp RoHS:否 制造商:ON Semiconductor 通道數量: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
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