參數(shù)資料
型號： AD8110ASTZ
廠商： Analog Devices Inc
文件頁數(shù)： 10/29頁
文件大?。?/td> 0K
描述： IC VIDEO CROSSPOINT SWIT 80LQFP
標準包裝： 1
功能： 視頻交叉點開關(guān)
電路： 1 x 16:8
電壓電源： 雙電源
電壓 - 電源，單路/雙路(±)： ±4.5 V ~ 5.5 V
電流 - 電源： 38mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 80-LQFP
供應(yīng)商設(shè)備封裝： 80-LQFP（12x12）
包裝： 托盤
REV. A
AD8110/AD8111
–17–
The basic concept in constructing larger crosspoint arrays is to
connect inputs in parallel in a horizontal direction and to
“wire-OR” the outputs together in the vertical direction. The
meaning of horizontal and vertical can best be understood by
looking at a diagram. Figure 6 illustrates this concept for a 32
× 8
crosspoint array.
AD8110
OR
AD8111
16
RTERM
IN 00–15
AD8110
OR
AD8111
16
RTERM
IN 16–31
8
Figure 6. A 32
× 8 Crosspoint Array Using Two AD8110s
or Two AD8111s
The inputs are each uniquely assigned to each of the 32 inputs
of the two devices and terminated appropriately. The outputs
are wire-ORed together in pairs. The output from only one of a
wired OR pair should be enabled at any given time. The device
programming software must be properly written to cause this
to happen.
At some point, the number of outputs that are wire-ORed becomes
too great to maintain system performance. This will vary according
to which system specifications are most important. It will also depend
on whether the matrix consists of AD8110s or AD8111s. The
output disabled impedance of the AD8110 is much higher than
that of the AD8111, so its disabled parasitics will have a smaller
effect on the one output that is enabled. For example, a 128
× 8
crosspoint can be created with eight AD8110/AD8111s. This
design will have 128 separate inputs and have the corresponding
outputs of each device wire-ORed together in groups of eight.
Using additional crosspoint devices in the design can lower the
number of outputs that must be wire-ORed together. Figure 7
shows a block diagram of a system using eight AD8110s and
two AD8111s to create a nonblocking, gain-of-two, 128
× 8
crosspoint that restricts the wire-ORing at the output to only
four outputs. These devices are the AD8110, which has a higher
disabled output impedance than the AD8111.
Additionally, by using the lower four outputs from each of the
two Rank 2 AD8111s, a blocking 128
× 16 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.
16
RTERM
IN 00–15
4
IN 16–31
IN 32–47
IN 48–63
IN 64–79
IN 80–95
IN 96–111
IN 112–127
4
RANK 2
16:8 NONBLOCKING
(16:16 BLOCKING)
RANK 1
(8 x AD8110)
128:16
16
RTERM
4
16
RTERM
4
16
RTERM
4
16
RTERM
4
16
RTERM
4
16
RTERM
4
16
RTERM
4
AD8111
AD8110
4
1k
4
1k
4
1k
4
1k
AD8111
OUT 00 – 07
NONBLOCKING
ADDITIONAL
8 OUTPUTS
(SUBJECT
TO BLOCKING)
Figure 7. A Gain-of-Two 128
× 8 Nonblocking Crosspoint Array (128 × 16 Blocking)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD8110ASTZ 制造商:Analog Devices 功能描述:Analog Crosspoint Switch IC
AD8110-EB 制造商:Analog Devices 功能描述:VID CROSSPT 260MHZ 16X8 - Bulk
AD8111 制造商:AD 制造商全稱:Analog Devices 功能描述:260 MHz, 16 x 8 Buffered Video Crosspoint Switches
AD8111AST 制造商:Analog Devices 功能描述:Analog Video Crosspoint 260MHz 16 x 8 80-Pin LQFP 制造商:Analog Devices 功能描述:IC SWITCH CROSSPOINT
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