Via size and spacing

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rd_dinesh

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I'm designing a power amplifier on an RT6006 board,
I want to place vias in my design, I want to know how we can decide the size and spacing between the vias.
 

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Okay, WHY do you want to place vias? For heat transfer? For routing between layers? Because you just like vias?
 

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rd_dinesh said:
for grounding the capacitors(i.e, routing between the layers)
Click to expand...
What current? What frequency? There are lots of free tools out there to help you calculate appropriate size. You've given us no inormation. Just search
"Via suze calculator"
 

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    rd_dinesh

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barry said:
What current? What frequency? There are lots of free tools out there to help you calculate appropriate size. You've given us no inormation. Just search
"Via suze calculator"
Click to expand...




currents through various capacitors in two different modes of operation.
 

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Keep in mind every trace and via adds about 1 Ohm/mm per GHz based on ESL of 0.6 nH/mm for path length.

So be aware why your Vdd noise spikes dV=Ic*dt/C and how damping works in simulations from impulse transitions. ( drivers )

If you do not know how to simulate it. Find out.
 
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