- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374044 > ADV3000 (Analog Devices, Inc.) 3:1 HDMI/DVI Switch with Equalization PDF資料下載
參數(shù)資料
| 型號： | ADV3000 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3:1 HDMI/DVI Switch with Equalization |
| 中文描述： | 3:1的HDMI / DVI接口與均衡開關(guān) |
| 文件頁數(shù)： | 24/28頁 |
| 文件大小： | 608K |
| 代理商： | ADV3000 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當(dāng)前第24頁第25頁第26頁第27頁第28頁
ADV3000
Auxiliary Control Signals
There are four single-ended control signals associated with each
source or sink in an HDMI/DVI application. These are hot plug
detect (HPD), consumer electronics control (CEC), and two
display data channel (DDC) lines. The two signals on the DDC
bus are SDA and SCL (serial data and serial clock, respectively).
These four signals can be switched through the auxiliary bus of
the ADV3000 and do not need to be routed with the same strict
considerations as the high speed TMDS signals.
In general, it is sufficient to route each auxiliary signal as a
single-ended trace. These signals are not sensitive to impedance
discontinuities, do not require a reference plane, and can be
routed on multiple layers of the PCB. However, it is best to
follow strict layout practices whenever possible to prevent the
PCB design from affecting the overall application. The specific
routing of the HPD, CEC, and DDC lines depends upon the
application in which the ADV3000 is being used.
For example, the maximum speed of signals present on the
auxiliary lines is 100 kHz I
2
C data on the DDC lines; therefore,
any layout that enables 100 kHz I
2
C to be passed over the DDC
bus should suffice. The HDMI 1.3 specification, however, places
a strict 50 pF limit on the amount of capacitance that can be
measured on either SDA or SCL at the HDMI input connector.
This 50 pF limit includes the HDMI connector, the PCB, and
whatever capacitance is seen at the input of the ADV3000, or an
equivalent receiver. There is a similar limit of 100 pF of input
capacitance for the CEC line.
The parasitic capacitance of traces on a PCB increases with
trace length. To help ensure that a design satisfies the HDMI
specification, the length of the CEC and DDC lines on the PCB
should be made as short as possible. Additionally, if there is a
reference plane in the layer adjacent to the auxiliary traces in
the PCB stackup, relieving or clearing out this reference plane
immediately under the auxiliary traces significantly decreases
the amount of parasitic trace capacitance. An example of the
board stackup is shown in Figure 33.
Rev. 0 | Page 24 of 28
PCB DIELECTRIC
LAYER 1: SIGNAL (MICROSTRIP)
SILKSCREEN
SILKSCREEN
PCB DIELECTRIC
PCB DIELECTRIC
LAYER 2: GND (REFERENCE PLANE)
LAYER 3: PWR (REFERENCE PLANE)
LAYER 4: SIGNAL (MICROSTRIP)
W
3W
3W
REFERENCE LAYER
RELIEVED UNDERNEATH
MICROSTRIP
0
Figure 33. Example Board Stackup
HPD is a dc signal presented by a sink to a source to indicate
that the source EDID is available for reading. The placement
of this signal is not critical, but it should be routed as directly
as possible.
When the ADV3000 is powered up, one set of the auxiliary
inputs is passively routed to the outputs. In this state, the
ADV3000 looks like a 100 Ω resistor between the selected
auxiliary inputs and the corresponding outputs as illustrated in
Figure 27. The ADV3000 does not buffer the auxiliary signals,
therefore, the input traces, output traces, and the connection
through the ADV3000 all must be considered when designing a
PCB to meet HDMI/DVI specifications. The unselected auxiliary
inputs of the ADV3000 are placed into a high impedance mode
when the device is powered up. To ensure that all of the auxiliary
inputs of the ADV3000 are in a high impedance mode when the
device is powered off, it is necessary to power the AMUXVCC
supply as illustrated in Figure 28.
In contrast to the auxiliary signals, the ADV3000 buffers the
TMDS signals, allowing a PCB designer to layout the TMDS
inputs independently of the outputs.
Power Supplies
The ADV3000 has five separate power supplies referenced to
two separate grounds. The supply/ground pairs are:
AVCC/AVEE
VTTI/AVEE
VTTO/AVEE
DVCC/DVEE
AMUXVCC/DVEE
The AVCC/AVEE (3.3 V) and DVCC/DVEE (3.3 V) supplies
power the core of the ADV3000. The VTTI/AVEE supply (3.3 V)
powers the input termination (see Figure 25). Similarly, the
VTTO/AVEE supply (3.3 V) powers the output termination
(see Figure 26). The AMUXVCC/DVEE supply (3.3 V to 5 V)
powers the auxiliary multiplexer core and determines the maxi-
mum allowed voltage on the auxiliary lines. For example, if the
DDC bus is using 5 V I
2
C, then AMUXVCC should be connected
to +5 V relative to DVEE.
In a typical application, all pins labeled AVEE or DVEE should
be connected directly to ground. All pins labeled AVCC,
DVCC, VTTI, or VTTO should be connected to 3.3 V, and
Pin AMUXVCC tied to 5 V. The supplies can also be powered
individually, but care must be taken to ensure that each stage of
the ADV3000 is powered correctly.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADV3000ASTZ | 3:1 HDMI/DVI Switch with Equalization |
| ADV3000ASTZ-RL | 3:1 HDMI/DVI Switch with Equalization |
| ADV3000-EVALZ | 3:1 HDMI/DVI Switch with Equalization |
| ADV453 | Circular Connector; No. of Contacts:22; Series:LJTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:13; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle |
| ADV458 | Triple 8-Bit Video RAM-DAC(三通道,8位視頻RAM-D/A轉(zhuǎn)換器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV3000ASTZ | 制造商:Analog Devices 功能描述:HDMI/DVI SWIT 80LQFP - Trays |
| ADV3000ASTZ-RL | 制造商:Analog Devices 功能描述:HDMI/DVI SWIT 80LQFP - Tape and Reel |
| ADV3000-EVALZ | 制造商:Analog Devices 功能描述:EVAL KIT FOR 3:1 HDMI/DVI SWIT W/ EQUALIZATION - Bulk |
| ADV3002 | 制造商:AD 制造商全稱:Analog Devices 功能描述:4:1 HDMI/DVI Switch with Equalization, DDC/CEC Buffers and EDID Replication |
| ADV3002BSTZ | 功能描述:IC SWITCH HDMI/DVI 4:1 80LQFP 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:- 應(yīng)用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:250 系列:- 功能:開關(guān) 電路:單刀單擲 導(dǎo)通狀態(tài)電阻:48 歐姆 電壓電源:單電源 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V 電流 - 電源:5µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:48-LQFP 供應(yīng)商設(shè)備封裝:48-LQFP（7x7） 包裝:托盤 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。