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| Lowest cost way to capture 110 channels of ADC data |
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| coromonadalix:
Why does it need to be sampled at this high speed in real time ?? I have nidaq cards at my job and i sample at least 9 times a sec on each channels and its enough to see some glitchs and problems ?????? I measure voltages and rf sources for ISO logging / reports, we needed an powerful pc to run this because of the bottleneck issues ... You dont tell what are you needed to check / verify at theses sampling speed Lots of speculation ... In the past i did a project with NI acquisitions cards in a pxi frame, 108 chanels to be precise, for milli seconds to almost nano seconds measurements, dumped thru network ... and yes its a ton of data passing thru, and you may need some buffering to catch what you want. Have you tought of the wiring issues too ? I know you want costs down, but you seem to take a strange road my 2 cents. |
| Rerouter:
You also can't forget about the costs for any input protection or buffering, Even laying out that monster would be interesting, 110 Analog inputs, probably with each given its own ground return, not to mention, if everything is commonly clocked to be in sequence, you have AMPS of switching noise at the sample rate, so even power routing will be interesting All i can say is, I hope that it succeeds, And I fear for your sanity during layout. |
| ali_asadzadeh:
Thanks guys, for your hints, I know the cost of ADC's are higher than the FPGA alone,But we are engineers and we need to squeeze the jucie out of these chips ;D :) Becasue after all it show how we are capable! OK, fair enough, I think a Zynq part would be much nicer, also maybe isolating each channel would be nice too, since it at least isolate each channel and the switching currents would not affect the ADC performance, maybe by using DC/DC parts like MAUxx series from meanwell and Digital isolators from Analog like ADUM3401 |
| Brutte:
--- Quote from: ali_asadzadeh on October 28, 2019, 06:30:18 am ---I know the cost of ADC's are higher than the FPGA alone,But we are engineers and we need to squeeze the jucie out of these chips ;D :) --- End quote --- Is your goal delivering a product or is it squeezing the juice out of the last flip-flop of FPGA? Maybe it is time you should inform your customer that you are burning his money? |
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