[SI-LIST] Re: 10 Layer Stack-up board/TWR PCB
- From: Jory McKinley <jory_mckinley@xxxxxxxxx>
- To: "Filion, Marc-Andre" <marc-andre.filion@xxxxxxxxxxxxxx>
- Date: Tue, 1 Nov 2011 09:02:36 -0700 (PDT)
My post are showing up either without content or partial? Hopefully this one
post correctly. This is the stack-up I would consider for Jayasuryan board:
TOP
GND
DVDD1_2/D2VDD1_2/DVDD1_8
GND
SIG1/SIG2
SIG3/SIG4
GND
DVDD5/DVDD3_3
GND
BOTTOM
Regards,
-Jory
From: "Filion, Marc-Andre" <marc-andre.filion@xxxxxxxxxxxxxx>
To: Jory McKinley <jory_mckinley@xxxxxxxxx>
Cc: si-list@xxxxxxxxxxxxx
Sent: Tuesday, November 1, 2011 10:45 AM
Subject: RE: [SI-LIST] Re: 10 Layer Stack-up board/TWR PCB
Hi,
I've always heard that it's a golden rule to have a symmetrical and balanced
stackup, is it just a solid myth or does it have solid roots?
Is it possible to have a non-balanced PCB? Does the dielectric must be also
balanced or just the copper layer?
What are the impact of having an unbalanced stackup?
Best regards,
Marc-André Filion | Hardware designer | Kontron Canada | T 450 437 5682 x2243 |
E marc-andre.filion@xxxxxxxxxxxxxx
Kontron Canada Inc
4555 Rue Ambroise-Lafortune
Boisbriand (Québec) J7H 0A4
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-----Message d'origine-----
De : si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] De la
part de Jory McKinley
Envoyé : Monday, October 31, 2011 6:06 PM
À : Jory McKinley; Jayasuryan KG; si-list@xxxxxxxxxxxxx
Objet : [SI-LIST] Re: 10 Layer Stack-up board/TWR PCB
This is a better baanced stack!
-JOry
________________________________
From: Jory McKinley <jory_mckinley@xxxxxxxxx>
To: Jory McKinley <jory_mckinley@xxxxxxxxx>; Jayasuryan KG
<suryan_tvm@xxxxxxxxxxx>; "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
Sent: Monday, October 31, 2011 3:23 PM
Subject: [SI-LIST] Re: 10 Layer Stack-up board/TWR PCB
retrun = return
and another typo PWR/SIG on lower layer needs swapped better decoupling loop.
TOP
GND1
DVDD1_2/D2VDD1_2/DVDD1_8
GND
SIG1/SIG2
GND
SIG3/SIG4
GND
DVDD5/DVDD3_3
BOTTOM
-Jory
From: Jory McKinley <jory_mckinley@xxxxxxxxx>
To: Jayasuryan KG <suryan_tvm@xxxxxxxxxxx>; "si-list@xxxxxxxxxxxxx"
<si-list@xxxxxxxxxxxxx>
Sent: Monday, October 31, 2011 1:53 PM
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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