ADS7067: Power supply for AVDD and DVDD

HARI T O1

Expert 1645 points

Part Number: ADS7067

Tool/software:

Dear Team,

Do I need to use separate LDO's for AVDD and DVDD rails.

Or Can I use a single LDO for powering the AVDD and DVDD rails.

Regards

HARI

2 months ago

0 Joel Meraz 2 months ago

TI__Genius 14790 points

Hi Hari,

You can supply both the AVDD and DVDD rails with one LDO.

Regards,
Joel

0 HARI T O1 2 months ago in reply to Joel Meraz

Expert 1645 points

Hi Joel,

Thank you.

Is it necessary to keep ferrite beads in the LDO path.

I read some articles like that.May I know your thoughts.

https://www.planetanalog.com/interfacing-to-adcs-power-supplies-part-3/

If yes how to select the ferrite bead

Regards

HARI

+1 Joel Meraz 2 months ago in reply to HARI T O1

TI__Genius 14790 points

Hi Hari,

Generally a ferrite bead isn't necessary unless you have a specific issue with high frequencies. That is especially true with this device, since it integrates an internal reference voltage, and the measurement will have some immunity from external supply noise.

Regards,
Joel

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ADS7067: Power supply for AVDD and DVDD