參數(shù)資料
型號(hào): AD8115AST
廠商: ANALOG DEVICES INC
元件分類: 運(yùn)動(dòng)控制電子
英文描述: Low Cost 225 MHz 16 X 16 Crosspoint Switches
中文描述: 16-CHANNEL, CROSS POINT SWITCH, PQFP100
封裝: 14 X 14 MM, PLASTIC, LQFP-100
文件頁數(shù): 17/26頁
文件大?。?/td> 363K
代理商: AD8115AST
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(guān)PDF資料
PDF描述
AD8114-EB Low Cost 225 MHz 16 X 16 Crosspoint Switches
AD8115-EB Low Cost 225 MHz 16 X 16 Crosspoint Switches
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD8115ASTZ 功能描述:IC VIDEO CROSSPOINT SWIT 100LQFP 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
AD8115ASTZ 制造商:Analog Devices 功能描述:IC SWITCH VIDEO
AD8115ASTZ2 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost 225 MHz 16 ?? 16 Crosspoint Switches
AD8115-EB 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost 225 MHz 16 X 16 Crosspoint Switches
AD8115-EVAL 制造商:Analog Devices 功能描述:EVAL BD LOW COST 225 MHZ 16 16 CROSSPOINT SWITES - Bulk