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Altera_Forum's avatar
Altera_Forum
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8 years ago

DC coupled ADC (HSMC)

I bought a "Terasic Cyclone V GX Starter Kit" and I have to process a analog signal. I bought a "Terasic Highspeed AD/DA Card" and connected it via HSMC. Unfortunatly I realized that the inputs are t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Thank you for the detailed answer. Could you please explain why the input range is 0.5 - 2.5V? I browsed through the ADs datasheet but I'm not sure what VREF and REFB etc. is in case of the Terasic card. And can I also achieve 0-2 V somehow? Would your modification allow a differential signal to be processed?

And just for understanding: Does single ended means, that I exchange the mass of the input signal with the mass of the board? And does this mean that a -1 - +1 V signal will become 0-2 V?

And regarding your modified schematics: does the crossed out parts have to be removed? And what does the external R33 mean? Do I have to put an additional resistor in there, or I just need to connect C1 with R33? And what is the second green wire for?