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參數資料
| 型號： | LMH6574MAX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 多路復用及模擬開關 |
| 英文描述： | 4:1 High Speed Video Multiplexer |
| 中文描述： | 4-CHANNEL, VIDEO MULTIPLEXER, PDSO14 |
| 封裝： | SOIC-14 |
| 文件頁數： | 10/15頁 |
| 文件大小： | 860K |
| 代理商： | LMH6574MAX |
Application Notes
GENERAL INFORMATION
The LMH6574 is a high-speed 4:1 analog multiplexer, opti-
mized for very high speed and low distortion. With selectable
gain and excellent AC performance, the LMH6574 is ideally
suited for switching high resolution, presentation grade video
signals. The LMH6574 has no internal ground reference.
Single or split supply configurations are both possible. The
LMH6574 features very high speed channel switching and
disable times. When disabled the LMH6574 output is high
impedance making MUX expansion possible by combining
multiple devices. See “Multiplexer Expansion” section below.
VIDEO PERFORMANCE
The LMH6574 has been designed to provide excellent per-
formance with production quality video signals in a wide
variety of formats such as HDTV and High Resolution VGA.
Best performance will be obtained with back-terminated
loads. The back termination reduces reflections from the
transmission line and effectively masks transmission line
and other parasitic capacitances from the amplifier output
stage.
Figure 1
shows a typical configuration for driving a
75
. Cable. The output buffer is configured for a gain of 2,
so using back terminated loads will give a net gain of 1.
FEEDBACK RESISTOR SELECTION
The LMH6574 has a current feedback output buffer with gain
determined by external feedback (R
) and gain set (R
)
resistors. With current feedback amplifiers, the closed loop
20119722
FIGURE 1. Typical Application
20119732
FIGURE 2. Suggested R
F
vs. Gain
L
www.national.com
10
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMH6574MAX/NOPB | 功能描述:多路器開關 IC RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| LMH6580 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8x4 500MHz Analog Crosspoint Switch, Gain of 1, Gain of 2 |
| LMH6580EVAL | 功能描述:其他開發工具 LMH6580 EVAL BOARD RoHS:否 制造商:Parallax 產品:ELEV-8 Hex Upgrade Kits 類型:Robotics 工具用于評估:ELEV-8 Quadcopter 工作電源電壓: |
| LMH6580VS | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8x4 500MHz Analog Crosspoint Switch, Gain of 1, Gain of 2 |
| LMH6580VS/NOPB | 功能描述:模擬和數字交叉點 IC RoHS:否 制造商:Micrel 配置:2 x 2 封裝 / 箱體:MLF-16 數據速率:10.7 Gbps 輸入電平:CML, LVDS, LVPECL 輸出電平:CML 電源電壓-最大:3.6 V 電源電壓-最小:2.375 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 產品:Digital Crosspoint 封裝:Tube |
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