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Mixed Signal pcb, which should I choose? 2 or 4 Layer?
I want to design a mixes signal pcb, I am thinking to design it as 2 layers or 4 layers, as the 4 layers board can reduce the noise, but it is more expensive.
If most of your routing can be placed on top layer and have mostly solid ground plane sections on the bottom layer, 2 layer boards is most suitable for you which will not cost so much.
If your design is a semi-high speed design, then a four layer will be better. A lot of this comes down to how much resolution you need from those ADCs. If you truly need 16 bits, then I think a 5% performance increase from a four layer board is worth it.
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