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參數(shù)資料
| 型號： | AD8182ARZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 0K |
| 描述： | IC MULTIPLEXER DUAL 2X1 14SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 功能： | 多路復(fù)用器 |
| 電路： | 2 x 2:1 |
| 電壓電源： | 雙電源 |
| 電壓 - 電源，單路/雙路(±)： | ±4 V ~ 6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOICN |
| 包裝： | 帶卷 (TR) |
AD8180/AD8182
–8–
REV. B
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 by
the AD8001 output back termination resistor 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), ISY = 5 mA
AD8011
Lower Power Consumption, Bandwidth (G = +2) =
210 MHz, ISY = 1 mA
AD8013
Triple Op Amp, Bandwidth (G = +2) = 140 MHz,
ISY = 3.4 mA
AD8073
Lower Power Triple Op Amp, Bandwidth (G = +2) =
100 MHz, ISY = 3.5 mA
8
7
6
5
ENABLE
ENABLE A
–VS
ENABLE B
–VS
+VS
0.1 F
10 F
0.1 F
10 F
0.1 F
+VS
+
75
RG
B
COMPUTER
GRAPHICS
RG
B
+
+VS
0.1 F
10 F
75
681
–VS
+
10 F
0.1 F
+
+VS
0.1 F
10 F
75
681
–VS
+
10 F
0.1 F
+
+VS
0.1 F
10 F
75
681
–VS
+
10 F
0.1 F
SELECT
MONITOR
1
2
3
4
AD8180
+1
1
2
3
4
14
13
12
11
AD8182
5
6
7
10
9
8
DECODER
+1
DECODER
+1
+
MPEG
RTERM
AD8001
681
AD8001
681
AD8001
R
G
B
0.1 F
10 F
+
10 F
DECODER
Figure 23. Multiplexing Two Component Video Sources
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8182-EB | 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:AD8182 EVALUATION BOARD - Bulk |
| AD8183 | 制造商:AD 制造商全稱:Analog Devices 功能描述:380 MHz, 25 mA, Triple 2:1 Multiplexers |
| AD81831ARZ | 制造商:Analog Devices 功能描述: |
| AD8183ARU | 制造商:Analog Devices 功能描述:Analog Multiplexer Triple 2:1 24-Pin TSSOP Tube 制造商:Rochester Electronics LLC 功能描述:TSSOP TRIPLE 2:1 G=+1 WIDEBAND MUX - Bulk 制造商:Analog Devices 功能描述:MUX 2CH 380MHZ SMD 8183 TSSOP24 |
| AD8183ARU-REEL | 制造商:Analog Devices 功能描述:Analog Multiplexer Triple 2:1 24-Pin TSSOP T/R |
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