CC430F5137: Analog power supplier below balanced RF lines

Henry Broeker

Part Number: CC430F5137

Hi,

I am working on a 2 Layer design based on CC430.

I try to keep the GND layer as clean as possible, especially below the RF parts. Now I am unsure about how to route the connection between the analog power supplies left and right from the balanced RF lines. Which of the two options attached do you think is better?

I haven't seen a 2 layer reference design that shows how to route this, maybe you can help me pointing out the needed resource?

Best,
Henry

over 7 years ago

0 Henry Broeker over 7 years ago

Intellectual 495 points

As a third option, I separated the left and right AVCC parts with an own ferrite each side. Would this be ok in your opinion? This way the GND can be kept clean underneath the RF lines.

Thanks,
Henry

0 Sverre over 7 years ago in reply to Henry Broeker

TI__Mastermind 39860 points

Routing underneath the RF lines going to the balun should be avoided. The third option is preferred, but if you provide the gerber files I can have a look and see if I can spot alternative solutions.

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CC430F5137: Analog power supplier below balanced RF lines