Same number of layers much much better noise/resonance isolation, where is the downside? ________________________________ From: Lee Ritchey <leeritchey@xxxxxxxxxxxxx> To: Jory McKinley <jory_mckinley@xxxxxxxxx>; "Filion, Marc-Andre" <marc-andre.filion@xxxxxxxxxxxxxx> Cc: si-list@xxxxxxxxxxxxx Sent: Tuesday, November 1, 2011 3:27 PM Subject: Re: [SI-LIST] Re: 10 Layer Stack-up board/TWR PCB Way too many ground planes. -------------------------------------------------- From: "Jory McKinley" <jory_mckinley@xxxxxxxxx> Sent: Tuesday, November 01, 2011 9:02 AM To: "Filion, Marc-Andre" <marc-andre.filion@xxxxxxxxxxxxxx> Cc: <si-list@xxxxxxxxxxxxx> Subject: [SI-LIST] Re: 10 Layer Stack-up board/TWR PCB > 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 > > The information contained in this document is confidential and property of > Kontron Canada Inc. Any unauthorized review, use, disclosure or > distribution is prohibited without express written consent of Kontron > Canada Inc. If you are not the intended recipient, please contact the > sender and destroy all copies of the original message and enclosed > attachments. > -----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 > > > > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu