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參數(shù)資料
| 型號： | AD8109 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 325 MHz, 8 x 8 Buffered Video Crosspoint Switches |
| 中文描述： | 325兆赫，8 × 8的緩沖視頻交叉點開關(guān) |
| 文件頁數(shù)： | 17/28頁 |
| 文件大?。?/td> | 434K |
| 代理商： | AD8109 |
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AD8108/AD8109
–17–
REV. 0
8 INPUTS
IN 00–07
AD8108
OR
AD8109
ONE
TERMINATION
PER INPUT
8
8
8
8
8
16 OUTPUTS
OUT 00–15
AD8108
OR
AD8109
Figure 42. 8
×
16 Crosspoint Array Using Two AD8108s
(Unity Gain) or Two AD8109s (Gain-of-Two)
Figure 43 illustrates a 16
×
16 crosspoint array, while a 24
×
24
crosspoint is illustrated in Figure 44. T he 16
×
16 crosspoint
requires that each input driver drive two inputs in parallel and
each output be wire-ORed with one other output. T he 24
×
24
crosspoint requires driving three inputs in parallel and having
the outputs wire-ORed in groups of three. It is required of the
system programming that only one output of a wired-OR node
be active at a time.
IN 00–07
8
8
8
8
OUT 00–07
8
8
OUT 08–15
00–07
R
TERM
08–15
R
TERM
8
8
IN 08–15
8
3
8
8
3
8
8
3
8
8
3
8
Figure 43. 16
×
16 Crosspoint Array Using Four
AD8108s or AD8109s
IN 00–07
8
8
8
8
IN 08–15
8
8
8
8
IN 16–23
8
R
TERM
8
R
TERM
8
R
TERM
8
OUT 16–23
OUT 08–15
OUT 00–07
8
3
8
8
3
8
8
3
8
8
3
8
8
3
8
8
3
8
8
3
8
8
3
8
8
8
8
8
3
8
Figure 44. 24
×
24 Crosspoint Array Using Nine AD8108s
or AD8109s
At some point, the number of outputs that are wire-ORed be-
comes too great to maintain system performance. T his will vary
according to which system specifications are most important.
For example, a 64
×
8 crosspoint can be created with eight
AD8108/AD8109s. T his design will have 64 separate inputs and
have the corresponding outputs of each device wire-ORed to-
gether in groups of eight.
Using additional crosspoint devices in the design can lower the
number of outputs that have to be wire-ORed together. Figure
45 shows a block diagram of a system using eight AD8108s and
two AD8109s to create a nonblocking, gain-of-two, 64
×
8 cross-
point that restricts the wire-ORing at the output to only four
outputs. T he rank 1 wire-ORed devices are the AD8108,
which has a higher disabled output impedance than the AD8109.
IN 00–07
8
4
4
IN 08–15
IN 16–23
IN 24–31
IN 32–39
IN 40–47
IN 48–55
IN 56–63
4
1k
V
4
1k
V
4
1k
V
4
1k
V
RANK 2
16:8 NONBLOCKING
16:16 BLOCKING
OUT 00–07
NONBLOCKING
ADDITIONAL
8 OUTPUTS
(SUBJECT TO
BLOCKING)
RANK 1
(64:16)
4
4
8
8
4
4
8
8
8
8
8
4
4
4
4
4
4
4
4
4
4
4
4
4
4
AD8109
AD8109
AD8108
AD8108
AD8108
AD8108
AD8108
AD8108
AD8108
AD8108
Figure 45. Nonblocking 64
×
8 Array with Gain-of-Two
(64
×
16 Blocking)
Additionally, by using the lower four outputs from each of the
two Rank 2 AD8109s, a blocking 64
×
16 crosspoint array can
be realized. T here are, however, some drawbacks to this tech-
nique. T he offset voltages of the various cascaded devices will
accumulate and the bandwidth limitations of the devices will
compound. In addition, the extra devices will consume more
current and take up more board space. Once again, the overall
system design specifications will determine how to make the
various tradeoffs.
Multichannel Video
T he excellent video specifications of the AD8108/AD8109 make
them ideal candidates for creating composite video crosspoint
switches. T hese can be made quite dense by taking advantage
of the AD8108/AD8109’s high level of integration and the fact
that composite video requires only one crosspoint channel per
system video channel. T here are, however, other video formats
that can be routed with the AD8108/AD8109 requiring more
than one crosspoint channel per video channel.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8109AST | ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84% |
| AD8109* | 325 MHz. 8 3 8 Buffered Video Crosspoint Switches |
| AD8109-EB | 325 MHz, 8 x 8 Buffered Video Crosspoint Switches |
| AD810AN | Low Power Video Op Amp with Disable |
| AD810AR | Low Power Video Op Amp with Disable |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD81090100 | 制造商:CELDUC 制造商全稱:celduc-relais 功能描述:REED SWITCH NORMALY OPEN, DRY CONTACT |
| AD8109AST | 制造商:Analog Devices 功能描述:Analog Video Crosspoint 250MHz 8 x 8 80-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:TQFP 250MHZ 8X8 G=+2 BUF VID XPOINT SW. - Tape and Reel 制造商:Analog Devices 功能描述:IC SWITCH CROSSPOINT |
| AD8109ASTZ | 功能描述:IC VIDEO CROSSPOINT SWIT 80LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 特色產(chǎn)品:MicroPak? 標(biāo)準(zhǔn)包裝:1 系列:- 功能:開關(guān) 電路:2 x SPST - NC 導(dǎo)通狀態(tài)電阻:500 毫歐 電壓電源:單電源 電壓 - 電源，單路/雙路(±):1.4 V ~ 4.3 V 電流 - 電源:150nA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-XFDFN 供應(yīng)商設(shè)備封裝:8-XSON，SOT833-1 （1.95x1） 包裝:Digi-Reel® 其它名稱:568-5557-6 |
| AD8109ASTZ | 制造商:Analog Devices 功能描述:Analog Crosspoint Switch IC |
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