參數(shù)資料
型號(hào)： 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(yè)數(shù)： 33/49頁(yè)
文件大?。?/td> 1768K
代理商： THS7372IPWR
SBOS578
– AUGUST 2011
EVALUATION MODULE
To evaluate the THS7372, an evaluation module (EVM) is available. The THS7372EVM allows for testing the
THS7372 in many different configurations. Inputs and outputs include BNC connectors and RCA connectors
commonly found in video systems, along with 75-
input termination resistors, 75- series source termination
resistors, and 75-
characteristic impedance traces. Several unpopulated component pads are found on the
EVM to allow for different input and output configurations as dictated by the user. This EVM is designed to be
used with a single supply from 2.6 V up to 5 V.
The EVM default input configuration sets all channels for dc input coupling. The input signal must be within 0 V
to approximately 1.4 V for proper operation. Failure to be within this range saturates and/or clips the output
signal. If the input range is beyond this, if the signal voltage is unknown, or if coming from a current sink DAC,
then ac input configuration is desired. This option is easily accomplished with the EVM by simply replacing the Z1
through Z4 0- resistors with 0.1-μF capacitors.
For an ac-coupled input and sync-tip clamp (STC) functionality commonly used for CVBS, component Y' signals,
and R'G'B' signals, no other changes are needed. However, if a bias voltage is needed after the input capacitor
which is commonly needed for component P'B, and P'R, then a pull-up resistor should be added to the signal on
the EVM. This configuration is easily achieved by simply adding a resistor to any of the following resistor pads;
RX4 to RX6 for the FHD channels and RX8 for the CVBS channel. A common value to use is 3.3 M
. Note that
even signals with embedded sync can also use bias mode if desired.
The EVM default output configuration sets all channels for ac output coupling. The 470-
μF and 0.1-μF capacitors
work well for most ac-coupled systems. However, if dc-coupled output is desired, then replacing the 0.1-
μF
capacitors (C24, C26, C28, and/or C30) with 0-
resistors works well. Removing the 470-μF capacitors is
optional, but removing them from the EVM eliminates a few picofarads of stray capacitance on each signal path
which may be desirable.
The THS7372 incorporates an easy method to configure the disable modes. The use of JP1 controls the SD
channel disable feature; JP3 controls the FHD channels disable feature.
Connection of JP1 and JP3 to GND applies 0 V to the disable pins and the THS7372 operates normally. Moving
JP1 to +VS causes the THS7372 SD channel to be in disable mode, while moving JP3 to +VS causes the
THS7372 FHD channels to be in disable mode.
Figure 90 shows the THS7372EVM schematic. Figure 92 and Figure 93 illustrate the two layers of the EVM PCB,
incorporating standard high-speed layout practices. Table 7 lists the bill of materials as the board comes supplied
from Texas Instruments.
Copyright
2011, Texas Instruments Incorporated
39
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS7372PWEVM 功能描述:放大器 IC 開發(fā)工具 THS7372 EVAL MOD RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評(píng)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(fā)工具 THS7373EVM Eval Mod RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評(píng)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(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
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