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Author Topic: NXP BGA Layout  (Read 1174 times)

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Offline mtechmattTopic starter

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NXP BGA Layout
« on: March 15, 2022, 11:49:49 am »
Hi All,

We had an engineer convert our QFP layout to BGA due to MCU shortage, and now, we have lots of noise on the ADC, USB etc. Heres a screen shot of the MCU - Im worried about the netting of the 3v3 and gnds etc - thin traces etc - what is right/wrong here - how would you guys get stable power and ground into this device?
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Offline nctnico

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Re: NXP BGA Layout
« Reply #1 on: March 15, 2022, 03:18:47 pm »
- Where are the bypass capacitors?
- Split ground is a big no
- Why no ground and power planes?

I'd start by having 1 single ground plane and put power bypass capacitors under the BGA if this is a board with components on both sides. Otherwise put the bypass cap. as close to the BGA as possible.

edit: typo
« Last Edit: March 15, 2022, 09:48:54 pm by nctnico »
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There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 
The following users thanked this post: thm_w

Offline thm_w

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Re: NXP BGA Layout
« Reply #2 on: March 15, 2022, 09:10:24 pm »
Yeah as nctnico said, very odd layout.
Agnd and Mcugnd going off where, why is there not a ground plane that they drop directly to with a via.

It looks like at least 4 layer board, wonder what the layers are even being used for.

What is the part number?
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