LMH6574

更新时间： 2024-02-04 05:20:46

品牌	Logo	应用领域
美国国家半导体 - NSC		复用器
页数	文件大小	规格书
15页	857K
描述
4:1 High Speed Video Multiplexer

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LMH6574 技术参数

Application Notes

GENERAL INFORMATION

20119722

FIGURE 1. Typical Application

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.

FEEDBACK RESISTOR SELECTION

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

75Ω. Cable. The output buffer is configured for a gain of 2,

so using back terminated loads will give a net gain of 1.

20119732

FIGURE 2. Suggested R_Fvs. Gain

The LMH6574 has a current feedback output buffer with gain

determined by external feedback (R_F) and gain set (R_G)

resistors. With current feedback amplifiers, the closed loop

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型号	品牌	描述	获取价格	数据表
LMH6574_05	NSC	4:1 High Speed Video Multiplexer	获取价格
LMH6574MA	TI	具有 4:1 高速多路复用器的 500MHz 高速运算放大器 \| D \| 14 \| -40	获取价格
LMH6574MA	NSC	4:1 High Speed Video Multiplexer	获取价格
LMH6574MA/NOPB	NSC	IC 4-CHANNEL, VIDEO MULTIPLEXER, PDSO14, SOIC-14, Multiplexer or Switch	获取价格
LMH6574MA/NOPB	TI	具有 4:1 高速多路复用器的 500MHz 高速运算放大器 \| D \| 14 \| -40	获取价格
LMH6574MAX	NSC	4:1 High Speed Video Multiplexer	获取价格