AN54908 calculation shows 65nm having a lower LSBU factor. In past experience smaller die have greater error. Are there improvements that accounts for the lower LSBU in the 65nm versus 90nm?
Please find our application note explaining the advantages of 65nm devices over 90nm devices at following link: http://www.cypress.com/documentation/application-notes/an94077-advantages-65-nm-technology-over-90-nm-syncnobl-srams . I hope this answers your query.
Thansk and Regards,Sudheesh