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Comment on my ADAU1442 power plane layout and decoupling

Question asked by DanielTwellmann on Nov 3, 2017
Latest reply on Nov 6, 2017 by DaveThib

Hi,

I am in the startof designing a system with an ADAU1442 together with an ADAU1966.

It is a four layer stackup:

   L1 = Signal
   L2 = GND
   L3 = Power
   L4 = Signal

 

I have two main questions:

  1. Does my decoupling layout look ok? I have tried to follow the guidelines in the data sheet. All the vias that go through the power plane connect to the GND layer.The caps are 0402 100nF. Bulk caps are not shown.
  2. Is it ok with a sort of nested layout for the 1V8 and the 3V3? Maybe they should be switched as the 3V3 will also be used for other IC's.

 

Thank you
-Daniel

ADAU1442 decoupling

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