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Altera_Forum's avatar
Altera_Forum
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14 years ago

physical interface between Cyclone III & DAC

Hello to all, I am working on a test waveform generator project using the Cyclone III starter kit (3C25N). Once synthesized on the FPGA, the waveform will be sent to a DAC so that it can be vi...
Altera_Forum's avatar
Altera_Forum
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14 years ago

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Does that mean that I can't output an analog signal with a DC offset?

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Look at the DAC5672 eval module schematic on p25

http://focus.ti.com/lit/ug/slau139b/slau139b.pdf

Its a transformer coupled output via a T1-1T, which is a minicircuits part

http://www.minicircuits.com/pdfs/t1-1t-kk81.pdf

So you have an output bandwidth limitation of 0.08-200MHz.

However, its your evaluation board once you've paid for it, so hack it at will. However, you will need to buffer the output if you remove the transformer.

Cheers,

Dave