DMVA2 VPBE - DAC

Elvis Mota

Hi,

In my current design using the DMVA2, VSSA_18_DAC and VSSA12_DAC have separate return paths connecting to DGND plane independently through a ferrite bead.

Should these two DAC grounds share the same return path?

I'm not seeing problems with my described approach, but I would like to hear the opinion of a TI expert.

Thanks,

Elvis

over 13 years ago

0 Prateek Bansal over 13 years ago

TI__Expert 4510 points

Hi,

Also, are you planning to use DAC peripheral on the device?

On both DM365 EVM schematics and DM365 IPNC Page 7, (http://support.spectrumdigital.com/boards/evmdm365/revf/) , those ground pins seems to sharing the same return path.

However, use of ferrite bead depends on your specific board layout and different noises that you are looking to suppress. Can you provide schematics of how you have these configured?

Prateek

Processors

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DMVA2 VPBE - DAC