Hi Gilles, The best article that I have seen on this subject is by Henry Ott, "Partitioning and Layout of a Mixed-Signal PCB". Another informative slideshow type PDF is from Tim Williams entitled "Advanced Topics in EMC Design", and is available on his Elmac Services website. www.hottconsultants.com/pdf_files/june2001pcd_mixedsignal.pdf www.elmac.co.uk/pdfs/Advanced_Topics_in_EMC_Design.pdf Good luck. PC --- In si-list@xxxxxxxxxxxxxxx, "Gilles Aminot" <gilles.aminot@...> wrote: > > Hi Everyone, > > I'm working on a new design and would like to eliminate split ground > planes. In the past we've always split the analog ground plane (for > analog audio circuits and codecs) and joined it at one location > (sometimes shorting or through an inductor). I've read lot's of postings > on this group explaining good reasons not to split ground planes, but > the only real supporting documentation I have seen is the following > article: > http://www.analog.com/analog_root/static/pdf/raq/RAQ_groundingADCs.pdf > <http://www.analog.com/analog_root/static/pdf/raq/RAQ_groundingADCs.pdf> > and it does not provide much depth.. > > I have been meeting some resistance to eliminating the split ground > planes and I am looking for technical articles showing the advantages of > using a single ground plane in designs with mixed high speed digital and > sensitve analog circuits. I keep bumping my head against datasheets or > articles that say analog & digital grounds should be separated (such as: > http://www.ultracad.com/articles/planesplits.pdf), which makes it > difficult to convince my peers that changing our approach is the way to > go. Can anyone share or point me to articles which may help me plead my > case. I would also appreciate if anyone could share some real life > experiences of going from split to single ground plane. > > Kindest Regards, > Gilles Aminot, P.Eng > Hardware Design Engineer > > Librestream Technologies Inc > Unit 200 - 55 Rothwell Rd > Winnipeg MB. Canada > R3P-2M5 > PH: 204-487-0612 Ext 218 > FX: 204-487-0914 > > ------------------------------------------------------------------ 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 or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu