• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 53 subscribers
  • Views 191 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC1101: Isolated Analog and Digital Supply?

Tobi Shires Nakamura
Prodigy 10 points
Part Number: CC1101

Most of the sub-1GHz CC11xx have separate analog and digital supply pins. My understanding is that these pins supply internal LDOs.

Are there any performance benefits of using a split supply for the analog and digital domains?

i.e., if a single supply is used to feed AVDD and DVDD, can switching noise from the digital domain contaminate the analog domain?

  • 0
    TI__Guru**** 317180 points
    Our reference designs and all measurements for the datasheet are done with the same PCB line going to all power pins which means we don't see any benefit from splitting them further. Correctly placed decoupling caps on all power pins will remove noise components that are potentially problematic.