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參數(shù)資料
| 型號： | AD8115-EB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Cost 225 MHz 16 X 16 Crosspoint Switches |
| 中文描述： | 低成本的225 MHz 16 × 16交叉點開關 |
| 文件頁數(shù)： | 17/26頁 |
| 文件大?。?/td> | 363K |
| 代理商： | AD8115-EB |
AD8114/AD8115
–17–
REV. 0
two AD8115s to create a nonblocking, gain-of-two, 128
×
16
crosspoint that restricts the wire-ORing at the output to only
four outputs.
Additionally, by using the lower eight outputs from each of the
two Rank 2 AD8115s, a blocking 128
×
32 crosspoint array can
be realized. There are, however, some drawbacks to this tech-
nique. The 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
The excellent video specifications of the AD8114/AD8115 make
them ideal candidates for creating composite video crosspoint
switches. These can be made quite dense by taking advantage of
the AD8114/AD8115’s high level of integration and the fact that
composite video requires only one crosspoint channel per sys-
tem video channel. There are, however, other video formats that
can be routed with the AD8114/AD8115 requiring more than
one crosspoint channel per video channel.
Some systems use twisted-pair wiring to carry video signals.
These systems utilize differential signals and can lower costs
because they use lower cost cables, connectors and termination
methods. They also have the ability to lower crosstalk and reject
common-mode signals, which can be important for equipment
that operates in noisy environments or where common-mode
voltages are present between transmitting and receiving equipment.
In such systems, the video signals are differential; there is a
positive and negative (or inverted) version of the signals. These
complementary signals are transmitted onto each of the two
wires of the twisted pair, yielding a first order zero common-
mode voltage. At the receive end, the signals are differentially
received and converted back into a single-ended signal.
When switching these differential signals, two channels are
required in the switching element to handle the two differential
signals that make up the video channel. Thus, one differential
video channel is assigned to a pair of crosspoint channels, both
input and output. For a single AD8114/AD8115, eight differential
video channels can be assigned to the 16 inputs and 16 outputs.
This will effectively form an 8
×
8 differential crosspoint switch.
Programming such a device will require that inputs and outputs
be programmed in pairs. This information can be deduced by
inspection of the programming format of the AD8114/AD8115
and the requirements of the system.
There are other analog video formats requiring more than one
analog circuit per video channel. One two-circuit format that is
commonly being used in systems such as satellite TV, digital
cable boxes and higher quality VCRs, is called S-video or Y/C
video. This format carries the brightness (luminance or Y)
portion of the video signal on one channel and the color (chromi-
nance, chroma or C) on a second channel.
16
R
TERM
IN 00–15
8
8
IN 16–31
IN 32–47
IN 48–63
IN 64–79
IN 80–95
IN 96–111
IN 112–127
8
8
8
8
RANK 2
32:16 NONBLOCKING
(32:32 BLOCKING)
RANK 1
(8
3
AD8114)
128:32
16
R
TERM
8
8
16
R
TERM
8
8
16
R
TERM
8
8
16
R
TERM
8
8
16
R
TERM
8
8
16
R
TERM
8
8
16
R
TERM
8
8
AD8115
8
1k
V
8
1k
V
8
1k
V
8
1k
V
AD8115
OUT 00–15
NONBLOCKING
ADDITIONAL
16 OUTPUTS
(SUBJECT
TO BLOCKING)
AD8114
AD8114
AD8114
AD8114
AD8114
AD8114
AD8114
AD8114
Figure 43. Nonblocking 128
×
16 Array (128
×
32 Blocking)
相關PDF資料 |
PDF描述 |
|---|---|
| AD8114 | 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% |
| AD8114AST | Low Cost 225 MHz 16 X 16 Crosspoint Switches |
| AD8115 | Low Cost 225 MHz 16 X 16 Crosspoint Switches |
| AD8115* | No RSENSE Current Mode Synchronous Step-Down Switching Regulator; Package: SO; No of Pins: 16; Temperature Range: 0°C to +70°C |
| AD8116 | Buffered Video Crosspoint Switch(200MHz,視頻正交開關) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD8115-EVAL | 制造商:Analog Devices 功能描述:EVAL BD LOW COST 225 MHZ 16 16 CROSSPOINT SWITES - Bulk |
| AD8116 | 制造商:AD 制造商全稱:Analog Devices 功能描述:200 MHz, 16 x 16 Buffered Video Crosspoint Switch |
| AD8116-EB | 制造商:Analog Devices 功能描述:AD8116 EVALUATION BOARD - Bulk |
| AD8116JST | 制造商:Analog Devices 功能描述:Analog Video Crosspoint 200MHz 16 x 16 128-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:TQFP 16X16 VIDEO CROSSPOINT SWITCH - Bulk 制造商:Analog Devices 功能描述:SWITCH CROSSPOINT 16X16 SMD 8116 |
| AD8116JSTZ | 功能描述:IC VIDEO CROSSPOINT SWIT 128LQFP 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(tài)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，F(xiàn)CBGA 供應商設備封裝:7-覆晶 包裝:帶卷 (TR) |
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