General • External ADC with 50-100MSps

Hi,

I have a simple project but it seems diffictult to me from the first glance. I want to use external ADC with high sampling rate from 50MSps to 100MSps. The ADC is 12 bits and shall provide the data as parallel interface.

It scares me when I see interfaces in such high speed. I never dealed with that before

The target is to read analog signal very fast and store the information in the RAM and later transfer it to PC for analysis. I don't need much samples. I believe I need to fill 128KB (128K/2 = 64K samples) of the SRAM.

My challanges are to use the PIOs since the normal GPIOs shall be slow for that. The DMA shall help to reduce the utilization of the CPU.

My questions :
-working at 50MHz-100MHz , do I need to care for the impedence of the interfaces to reduce wave reflection and this kind of microwave staff?
- is there any fast/effecient way for ransfering the Sample from RAM to PC rather than printf?
-is there any existing projects were code can be resused instead of re-inventing the wheel ?

Statistics: Posted by akhodeir — Mon Jan 22, 2024 8:49 am

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