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參數資料
| 型號： | AD8180 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 10 ns Switching Multiplexers(開關多路復用器) |
| 中文描述： | 10ns的開關多路復用器（開關多路復用器） |
| 文件頁數： | 8/12頁 |
| 文件大小： | 345K |
| 代理商： | AD8180 |
AD8180/AD8182
–8–
REV. 0
APPLICATIONS
Multiplexing two RGB Video Sources
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
resistors. This has the effect of halving the signal amplitude
of the applied signals.
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
back terminated load (R
L
= 150
), the
multiplexer outputs are buffered using the AD8001 current feed-
back op amp. A gain of two compensates for the signal halving at
the input so that the system has an overall gain of unity.
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.
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.
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
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
8
7
6
5
ENABLE
ENABLE
A
–V
S
ENABLE
B
–V
S
+V
S
0.1μF
10μF
0.1μF
10μF
0.1μF
+V
S
10μF
+
75
75
75
75
75
75
R
G
B
COMPUTER
GRAPHICS
R
G
B
+
+V
S
0.1μF
10μF
75
681
–V
S
+
10μF
0.1μF
+
+V
S
0.1μF
10μF
75
681
681
–V
S
+
10μF
0.1μF
+
+V
S
0.1μF
10μF
75
681
–V
S
+
10μF
0.1μF
SELECT
MONITOR
1
2
3
4
AD8180
DECODER
+1
+1
1
2
3
4
14
13
12
11
AD8182
5
6
7
10
9
8
DECODER
+1
+1
DECODER
+1
+1
+
+
MPEG
R
TERM
AD8001
681
AD8001
681
AD8001
R
G
B
0.1μF
10μF
+
Figure 23. Multiplexing Two Component Video Sources
相關PDF資料 |
PDF描述 |
|---|---|
| AD8182 | 10 ns Switching Multiplexers(開關多路復用器) |
| AD8186ARU-REEL | 480 MHz Single-Supply (5 V) Triple 2:1 Multiplexers |
| AD8186ARU-REEL7 | 480 MHz Single-Supply (5 V) Triple 2:1 Multiplexers |
| AD8187-EVAL | 480 MHz Single-Supply (5 V) Triple 2:1 Multiplexers |
| AD8187ARU | 480 MHz Single-Supply (5 V) Triple 2:1 Multiplexers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8180AN | 制造商:Analog Devices 功能描述:Analog Multiplexer Single 2:1 8-Pin PDIP 制造商:Rochester Electronics LLC 功能描述:PDIP 2:1 WIDEBAND MULTIPLEXER - Bulk |
| AD8180ANZ | 功能描述:IC MULTIPLEXER 2X1 8DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 其它有關文件:STG4159 View All Specifications 標準包裝:5,000 系列:- 功能:開關 電路:1 x SPDT 導通狀態電阻:300 毫歐 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±1.65 V ~ 4.8 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:7-WFBGA，FCBGA 供應商設備封裝:7-覆晶 包裝:帶卷 (TR) |
| AD8180AR | 制造商:Analog Devices 功能描述:Analog Multiplexer Single 2:1 8-Pin SOIC N Tube 制造商:Rochester Electronics LLC 功能描述:SOIC 2:1 WIDEBAND MULTIPLEXER - Bulk 制造商:Analog Devices 功能描述:Multiplexer IC Multiplexer Type:Single-E |
| AD8180AR-REEL | 制造商:Analog Devices 功能描述:Analog Multiplexer Single 2:1 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:SOIC 2:1 WIDEBAND MULTIPLEXER - Tape and Reel |
| AD8180AR-REEL7 | 制造商:Analog Devices 功能描述:Analog Multiplexer Single 2:1 8-Pin SOIC N T/R |
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