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How to connect PCB and FPGA board? (Read 2982 times)
mixed_signal
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How to connect PCB and FPGA board?
Apr 15th, 2016, 9:24pm
 
Hi,
I have a custom RFIC in QFN package with bond wires. The IC is soldered on a PCB. There are 20 digital I/Os in custom board and they need to be controlled using Kintex FPGA board.The data speed is 40Mbps in each I/O. How to connect the PCB and FPGA board (see attached figure)?

The FPGA board has FMC connector. I am planning to use board to board flexible connector between my PCB and FPGA board. Is there better solution?
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FPGA__connectivity.jpg
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ULPAnalog
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Re: How to connect PCB and FPGA board?
Reply #1 - Apr 15th, 2016, 10:50pm
 
Is the separation half a meter?
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mixed_signal
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Re: How to connect PCB and FPGA board?
Reply #2 - May 4th, 2016, 8:45pm
 
Hi ULPAnalog,
Yes the seperation is half meter. I am worried about logic levels. The buffers onchip are 1V CMOS single ended inveretrs. Do I need level shifters after FMC?
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loose-electron
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Re: How to connect PCB and FPGA board?
Reply #3 - Jul 6th, 2016, 10:37pm
 
that is a lot of parallel digital IO

if you need all that distance, you might want to convert to LVDS output driver from one board, transfer over a twisted pair and then convert back thru LVDS receiver to the local PCB ground.
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Jerry Twomey
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