crosspoint switch

I want to feed 12 channels of RGB signals, 1 Y/C signal (i.e.) 38 signals as input to crosspoint switch. The available crosspoint switch (ADV3201) supports only 32 inputs : 32 outputs. I want to derive 2 outputs from any input channels that I want without any limitation. So kindly suggest me Analog devices parts to implement my logic.

  • 0
    •  Analog Employees 
    on Aug 13, 2018 6:10 PM

    Hi,
     But ADV7625 has only 5-input, 2-output cross-point transceiver HDMI Support.Please refer below product page

     ADV7625 Datasheet and Product Info | Analog Devices 

    Thanks,

    Poornima

  • 0
    •  Analog Employees 
    on Aug 13, 2018 6:14 PM

    Hello,

    The ADV7625 is not what you are looking for.  I am looking at the issue now and will have a recommendation shortly as I review the available solutions

  • 0
    •  Analog Employees 
    on Aug 13, 2018 6:43 PM

    Let me restate the problem a bit:

    1) input 12 x RGB analog channels

    2) input 1 x Y/C analog channels - treat this as 1 RGB analog channel

    3) Total of 13 RGB analog input channels to deal with, or 3x13 = 39 input signal paths

    I assume you only need 13 outputs and when you say 2 outputs of any one input channel, this will cause blocking of another input channel

    4) output 13 x RGB analog channels, total of 39 output signal paths

    As you've noticed the ADV3201 is only 32x32.  So you will need to use two ADV3201s where the first parts only muxes the R & G portions of the input and the second part muxes the B portion of the input channels

    5) Part 1 would mux R & G or 2x13 (26) signal traces and Part 2 would mux the B or 1 x 13 (13) signal traces.

    Three ADV3201s can handle 32x32 RGB muxing 

    This is the same approach I used to design a 32x32 HDMI matrix switch only using four 64x64 digital cross points devices.  I split the channels up into 4 parts and ran each part set through individual devices.

  • Hi,

       You have understood the problem that i have stated and I am glad that you have given me a good solution but 3 ADV3201 is costly to afford. Can you provide me a solution to implement the same giving me provision to choose any inputs as my output with any Analog devices parts or combination of 2 crosspoint switches with different part numbers fulfilling my requirement? I want only 2 outputs and in that case blocking of remaining input channel is not a problem for me.

  • 0
    •  Analog Employees 
    on Aug 14, 2018 4:58 PM

    You have to look at this problem as needing three 13x13 matrix switches.  This can be accomplished with:

    1) three 16x16 parts (ADV3227)(cost ~$150) where each part handles one of the three 13x13 matrix switch sets  (wastes 9 input-output paths)

    2) two 32x32 parts (ADV3201)(cost ~$200) where the first part handles two 13x13 matrix switch sets and the second part handles the third 13x13 matrix switch set. (wastes 25 input-output paths)

    3) One 32x32 part (ADV3201)(cost ~$100) and one 16x16 part (ADV3227)(cost ~$50).  The 32x32 would handle two 13x13 matrix switch set while the 16x16 part would handle the third matrix switch set.  (wastes 9 input-output paths)(cost ~$150 total)

    4) A Clos Network style using 8x8 parts (like AD8109) would require at least 5 parts on both input and output layers costing ~$200.  This does not include in internal layers.

    5) Custom designed matrix switch based on analog switches like the ADG1606 and lots of op-amps.  Here you would have to watch out for the bandwidth and total system cost including total part count and required PCB space to implement the 3x13x13 matrix switch.

    Note these cost are directly from the web site and maybe different depending on you supply chain.

    Also you have never mentioned the max RGB format.  We would need this to determine the required bandwidth of the parts.

    My pick would be option 3.  Fewest parts, lowest cost, lower power requirements.