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Discussion Groups | Analog Devices DSPs | PCB layout

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

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PCB layout - dirk...@gmail.com - Oct 30 11:25:20 2007

Looking at the documentation it ADI recommend a separate analog power and ground plane.
Can I get away with just a 4 layer board and still maintain a good SNR ie close to the SNR spec
of the chips?

Dirk

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Re: PCB layout - Maciej Kulesza - Oct 31 9:18:42 2007

Hi,

I have designed 4-layer PCB for ADSP21262 and 24-bit audio codec without 
separated analog and digital ground LAYERS, and the SNR is as in 
converter datasheet. So, you can use 4-layer PCB instead of 6-layer but 
you have to carefully separate analog and digital ground planes on one 
layer.

Take care,
Maciej Kulesza

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