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參數(shù)資料
| 型號： | AD8159 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3.2 Gbps Quad Buffer Mux/Demux |
| 中文描述： | 3.2 Gbps的四緩沖/解復(fù)用器 |
| 文件頁數(shù)： | 21/24頁 |
| 文件大?。?/td> | 499K |
| 代理商： | AD8159 |
AD8159
AC Coupling
In general, more V
TTO
supply headroom is required with ac-
coupled outputs. When the outputs are ac-coupled, the average
single-ended current does not see the far end 50 Ω termination
because the capacitor acts as a dc block. For example, with
PE = 0, the single-ended output current alternates from 0 mA
to 16 mA, or 8 mA on average. This 8 mA current flows entirely
through the on-chip 50 Ω termination resistor due to the dc
block.
Rev. A | Page 21 of 24
The single-ended output voltage has an average value of
V
TTO
8
mA
×
50 Ω =
V
TTO
400 mV
For appropriate data patterns,
1
the capacitor acts as a short and
the voltage swing is 400 mV p-p, identical to the dc-coupled case.
The low output voltage is, therefore,
V
TTO
400 mV 200 mV =
V
TTO
600 mV
1
AC coupling requires that the signal pattern have no long term dc
component. Codes such as 8b/10b, for example, ensure that the data
pattern is benign in an ac-coupled link.
The lowest acceptable value for V
TTO
is
V
CC
1.6 V + 0.6 V =
V
CC
1.0 V
The same exercise can be repeated for other pre-emphasis
settings.
Output Compliance Table
To simplify the task of interfacing to the AD8159 output,
Table 13 is useful as a quick-reference. It provides the minimum
and maximum values for output termination voltage for both
ac and dc coupling. The values in the table are valid for any pre-
emphasis setting.
Table 13. Output Compliance
AC-Coupled
Minimum
(V)
(V)
V
TTO
V
CC
– 0.5
V
CC
+ 0.6
V
TTOI
V
CC
– 0.4
V
CC
+ 0.6
DC-Coupled
Maximum
Minimum
(V)
V
CC
– 0.9
V
CC
– 0.8
Maximum
(V)
V
CC
+ 0.6
V
CC
+ 0.6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8159ASVZ | 3.2 Gbps Quad Buffer Mux/Demux |
| AD8159-EVAL-AC | 3.2 Gbps Quad Buffer Mux/Demux |
| AD8159-EVAL-DC | 3.2 Gbps Quad Buffer Mux/Demux |
| AD8183-EVAL | 380 MHz, 25 mA, Triple 2:1 Multiplexers |
| AD8183 | 380 MHz, 25 mA, Triple 2:1 Multiplexers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8159ASVZ | 功能描述:IC MUX/DEMUX QUAD BUFF 100TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:XStream™ 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| AD8159-EVAL-AC | 制造商:Analog Devices 功能描述:EVAL KIT FOR AC-COUPLED EVAL BD - Bulk |
| AD8159-EVAL-DC | 制造商:Analog Devices 功能描述:DC-COUPLED EVAL BD - Bulk |
| AD8159XSVZ | 制造商:Analog Devices 功能描述:QUAD-LANE 3.2GBPS 2:1 MUX / 1:2 DEMUX SWITCH 100-PIN TQFP_EP - Trays |
| AD815ARB24 | 制造商:Analog Devices 功能描述: |
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