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參數(shù)資料
| 型號： | AD8109-EB |
| 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(diǎn)開關(guān) |
| 文件頁數(shù)： | 20/28頁 |
| 文件大小： | 434K |
| 代理商： | AD8109-EB |
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AD8108/AD8109
–20–
REV. 0
All trademarks are property of their respective holders.
From a circuit standpoint, this output crosstalk mechanism
looks like a transformer, with a mutual inductance between the
windings, that drives a load resistor. For low frequencies, the
magnitude of the crosstalk is given by:
|
X T
| = 20 log
10
(
Mxy
×
s
/
R
L
)
where
Mxy
is the mutual inductance of output
x
to output
y
and
R
L
is the load resistance on the measured output. T his crosstalk
mechanism can be minimized by keeping the mutual inductance
low and increasing R
L
. T he mutual inductance can be kept low
by increasing the spacing of the conductors and minimizing
their parallel length.
PCB Layout
Extreme care must be exercised to minimize additional crosstalk
generated by the system circuit board(s). T he areas that must be
carefully detailed are grounding, shielding, signal routing and
supply bypassing.
T he packaging of the AD8108/AD8109 is designed to help keep
the crosstalk to a minimum. Each input is separated from each
other input by an analog ground pin. All of these AGNDs
should be directly connected to the ground plane of the circuit
board. T hese ground pins provide shielding, low impedance
return paths and physical separation for the inputs. All of these
help to reduce crosstalk.
Each output is separated from its two neighboring outputs by an
analog ground pin in addition to an analog supply pin of one
polarity or the other. Each of these analog supply pins provides
power to the output stages of only the two nearest outputs.
T hese supply pins and analog grounds provide shielding, physi-
cal separation and a low impedance supply for the outputs.
Individual bypassing of each of these supply pins, with a 0.01
μ
F
chip capacitor directly to the ground plane, minimizes high
frequency output crosstalk via the mechanism of sharing com-
mon impedances.
Each output also has an on-chip compensation capacitor that
is individually tied the nearby analog ground pins AGND00
through AGND07. T his technique reduces crosstalk by prevent-
ing the currents that flow in these paths from sharing a common
impedance on the IC and in the package pins. T hese AGNDxx
signals should all be directly connected to the ground plane.
T he input and output signals will have minimum crosstalk if
they are located between ground planes on layers above and
below, and separated by ground in between. Vias should be
located as close to the IC as possible to carry the inputs and
outputs to the inner layer. T he only place the input and output
signals surface is at the input termination resistors and the out-
put series back termination resistors. T hese signals should also
be separated, to the extent possible, as soon as they emerge from
the IC package.
E valuation Board
A four-layer evaluation board for the AD8108/AD8109 is avail-
able. T he exact same board and external components are used
for each device. T he only difference is the device itself, which
offers a selection of a gain of unity or gain of two through the
analog channels. T his board has been carefully laid out and
tested to demonstrate the specified high speed performance of
the device. Figure 46 shows the schematic of the evaluation
board. Figure 47 shows the component side silk-screen. T he
layouts of the board’s four layers are given in Figures 48, 49, 50
and 51.
T he evaluation board package includes the following:
Fully populated board with BNC-type connectors.
Windows based software for controlling the board from a
PC via the printer port.
Custom cable to connect evaluation board to PC.
Disk containing Gerber files of board layout.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD810AN | Low Power Video Op Amp with Disable |
| AD810AR | Low Power Video Op Amp with Disable |
| AD810AR-REEL | ECONOLINE: REC2.2-S_DR/H1 - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75% |
| AD810 | Low Power Video Op Amp with Disable(帶禁用的低功耗視頻運(yùn)放) |
| AD8110 | Buffered Video Crosspoint Switches(視頻正交開關(guān)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD810ACHIPS | 制造商:Analog Devices 功能描述: |
| AD810AN | 功能描述:IC CURR-FDBK AMP VIDEO LP 8-DIP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| AD810ANZ | 功能描述:IC CURR-FDBK AMP VIDEO LP 8-DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| AD810AR | 功能描述:IC CURR-FDBK AMP VIDEO LP 8-SOIC RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| AD810AR-EBZ | 功能描述:BOARD EVAL FOR AD810AR RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
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