Author Topic: power rail for DAC - PCB layout  (Read 659 times)

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Offline kamtarTopic starter

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power rail for DAC - PCB layout
« on: March 06, 2020, 11:13:26 am »
Hello,

I'm trying as my hobby project to design USB DAC so far I'm okay with my PCB layout except for one thing and that is 3V3 rail for CS4398.
As you can see in an attached picture it's going all around PCB.

1. Should I be worried about it? Not sure how digital power rail is important for DAC.
2. If yes what would be the best solution, to break my ground plane more and route it directly, or maybe to put another LDO next to the IC?
 

Offline Evan.Cornell

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Re: power rail for DAC - PCB layout
« Reply #1 on: March 06, 2020, 07:30:55 pm »
4 layer PCB, Layer 1 signal, Layer 2 ground, Layer 3 power, Layer 4 signal. 4 layer boards are not that expensive.
 

Offline kamtarTopic starter

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Re: power rail for DAC - PCB layout
« Reply #2 on: March 06, 2020, 10:39:23 pm »
This will be 2 layers only. If I would use 4 layer cost would go from 20 USD to 100USD, that's not in my budget for PCB.
« Last Edit: March 06, 2020, 10:41:11 pm by kamtar »
 

Offline David Hess

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Re: power rail for DAC - PCB layout
« Reply #3 on: March 07, 2020, 12:52:40 am »
It will be fine as long as high frequency decoupling requirements are met.
 


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