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# 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.

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• 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.

• 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.

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