[SI-LIST] Re: 10 Layer Stack-up board/TWR PCB
- From: "Stefan Milnor" <stefan.milnor@xxxxxxxxxxxxxx>
- To: "Jory McKinley" <jory_mckinley@xxxxxxxxx>, "Jayasuryan KG" <suryan_tvm@xxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 31 Oct 2011 12:21:47 -0700
Doesn't this go against the "balanced construction" advice one usually gets
from PCB vendors?
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Jory McKinley
Sent: Monday, October 31, 2011 11:54 AM
To: Jayasuryan KG; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: 10 Layer Stack-up board/TWR PCB
I would consider better power/gnd return, keep in mind loop inductance to
appropriate power (TOP/BOTTOM) placement, you can swap power planes where
needed. This will reduce retrun path discontinuity and potential cavity
resonance. Make sure to include z-axis via retrun stitching.
TOP
GND1
DVDD1_2/D2VDD1_2/DVDD1_8
GND
SIG1/SIG2
GND
DVDD5/DVDD3_3
GND
SIG3/SIG4
BOTTOM
-Jory
From: Jayasuryan KG <suryan_tvm@xxxxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Sent: Monday, October 31, 2011 12:39 PM
Subject: [SI-LIST] 10 Layer Stack-up board/TWR PCB
Dear Experts,
I have a question regarding my Through Wall Radio(TWR) PCB. My stack-up is as
follows.
TOP
GND1
SIG1/DVDD1_8
SIG2/DVDD1_2
PWR1/DVDD3_3
PWR2/DVDD5
SIG3/D2VDD1_2
SIG4/DVDD5
GND2
BOTTOM
Max current in this board is less than 1A and interfaces like ADC,DAC and video
signals.
Also my RF interfaces are going on the top portion of the board, which is
completely isolated form others and running under GND plane. (find the link for
pictures)
https://picasaweb.google.com/104062213607119029710/October312011#5669711738723806994
https://picasaweb.google.com/104062213607119029710/October312011#5669711807720941682
I am wondering is there any issue, if I split the power planes like the above
layer stack-up? Or any can give better suggestions!
Looking for your valuable help.
Best Regards,
- Jayasuryan
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