Datasheet > AD8180_15

AD8180_15

更新时间： 2022-02-26 12:59:48

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	256K
描述
10 ns Switching Multiplexers

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数据手册

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AD8180_15 数据手册

AD8180/AD8182

APPLICATIONS

Multiplexing two RGB Video Sources

With no signal present, the total quiescent current of the cir-

cuit in Figure 23 is 25.6 mA (3.8 mA + 6.8 mA + 3 × 5 mA), or

about 8.5 mA per channel. If either the AD8013 or AD8073

are used, the quiescent current will decrease to about 6.5 mA

per channel.

A common video application requires two RGB sources to be

multiplexed together before the selected signal is applied to a

monitor. Typically one source would be the PC’s normal output,

the second source might be a specialized source such as MPEG

video. Figure 23 shows how such a circuit could be realized

using the AD8180 and AD8182 and three current feedback op

amps. The video inputs to the multiplexers are terminated with

75 Ω resistors. This has the effect of halving the signal amplitude

of the applied signals.

To reduce power consumption further, three AD8011 single

op amps can be used. With a quiescent current of 1 mA, this

will reduce the per channel quiescent current to about 4.5 mA.

Table II. Amplifier Options for RGB Multiplexer

Op Amp Comments

Because all three multiplexers are permanently active, the

ENABLE pins are tied permanently low. The three SELECT

pins are tied together and this signal is used to select the source.

In order to drive a 75 Ω back terminated load (R_L= 150 Ω), the

multiplexer outputs are buffered using the AD8001 current feed-

back op amp. A gain of two compensates for the signal halving by

the AD8001 output back termination resistor so that the system

has an overall gain of unity.

AD8001 Highest Bandwidth, 440 MHz (G = +2), I_SY= 5 mA

AD8011 Lower Power Consumption, Bandwidth (G = +2) =

210 MHz, I_SY= 1 mA

AD8013 Triple Op Amp, Bandwidth (G = +2) = 140 MHz,

I_SY= 3.4 mA

AD8073 Lower Power Triple Op Amp, Bandwidth (G = +2) =

100 MHz, I_SY= 3.5 mA

If lower speed and crosstalk can be tolerated, either of the triple

op amps, AD8013 or AD8073, can replace the three AD8001 op

amps in the above circuit. Because both devices have bandwidths

in the 100 MHz to 140 MHz range at a gain of +2, these ampli-

fiers will dominate the frequency response of the circuit.

681⍀

10␮F

0.1␮F

MPEG

75⍀

AD8001

0.1␮F

75⍀

10␮F

ENABLE

DECODER

–V

75⍀

681⍀

AD8180

–V

10␮F

0.1␮F

10␮F

75⍀

MONITOR

ENABLE A

AD8001

DECODER

0.1␮F

75⍀

10␮F

AD8182

–V

75⍀

10␮F

–V

10␮F

DECODER

ENABLE B

681⍀

75⍀

10␮F

0.1␮F

COMPUTER

GRAPHICS

TERM

75⍀

AD8001

0.1␮F

10␮F

SELECT

–V

Figure 23. Multiplexing Two Component Video Sources

REV. B

–8–

1...5 6 789 10 11 12

中文翻译

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与AD8180_15相关器件

型号	品牌	描述	获取价格	数据表
AD8180AN	ADI	750 MHz, 3.8 mA 10 ns Switching Multiplexers	获取价格
AD8180ANZ	ADI	暂无描述	获取价格
AD8180AR	ADI	750 MHz, 3.8 mA 10 ns Switching Multiplexers	获取价格
AD8180AR-REEL	ADI	750 MHz, 3.8 mA 10 ns Switching Multiplexers	获取价格
AD8180AR-REEL7	ADI	750 MHz, 3.8 mA 10 ns Switching Multiplexers	获取价格
AD8180ARZ	ADI	750 MHz, 3.8 mA 10 ns Switching Multiplexers	获取价格
AD8180ARZ-R7	ROCHESTER	2-CHANNEL, VIDEO MULTIPLEXER, PDSO8, PLASTIC, SOIC-8	获取价格
AD8180ARZ-REEL	ADI	2-CHANNEL, VIDEO MULTIPLEXER, PDSO8, PLASTIC, SOIC-8	获取价格
AD8180ARZ-REEL7	ADI	2-CHANNEL, VIDEO MULTIPLEXER, PDSO8, PLASTIC, SOIC-8	获取价格
AD8180ARZ-RL	ADI	Single, 2:1 Buffered, 750 MHz, 3.8 mA 10 ns Switching Multiplexer	获取价格

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