Hi Aman, As Tim pointed out, you should check with your EDA tool vendor to get their best practice for doing this. To see one method from Sigrity, please reference slide 16 of: http://www.eda.org/ibis/summits/feb08/chitwood.pdf Your question 3 is the heart of the issue. IBIS pkg models are limited in many ways, so it is now common industry practice to use an alternative method, such as general SPICE net lists. These net lists have significantly better accuracy, bandwidth, connectivity options, and contain header information that automates connectivity with Die and PCB. Best regards, Sam On Wed, Jul 8, 2009 at 11:34 AM, Timothy Coyle <tim.coyle@siconsultant.com>wrote: > Hi Aman, > If you are going to run the simulations than most commercial EDA tools will > probably support the mixing of SPICE and IBIS models together. But the > implementation may be difficult depending on how your EDA tool works. Most > tools by default will take the IBIS buffer component and then hook up the > correct .pkg RLC matrix structure. However in your case you want to insert > a > SPICE model in between the IBIS and .pkg component if I understand you > correctly. It will probably be best if you contact your tool vendor to see > what support they have for this option. One work-around would be to use the > IBIS buffer component with no package at all, than include your SPICE > model, > and then hook up the .pkg component maybe by using a Terminator model or > dummy driver. Again the implementation will really depend on the options > allowed by your tool vendor. You could always take the .pkg data out of the > IBIS file and re-format into a separate SPICE model as well. Finally you > may > be able to model the on-die interconnect using the IBIS EBD or ICM format. > > Hope this helps, > > Timothy Coyle > President > Signal Consulting Group LLC > 405 Western Ave #430 > South Portland, ME 04106 > Tel: 617.297.2566 > Email: tim.coyle@siconsultant.com > Web: http://www.siconsultant.com > SharkSim - IBIS Modeling Made Easy > > > -----Original Message----- > From: owner-ibis-users@server.eda.org > [mailto:owner-ibis-users@server.eda.org] On Behalf Of Aman MALHOTRA > Sent: Wednesday, July 08, 2009 8:07 AM > To: ibis-users@server.eda.org; ibis-info@server.eda.org > Subject: [IBIS-Users] How to model Flip-Chip Die IBIS model > > Hello All, > > I need help to model a Flip-Chip die. > > I have a .pkg file which models the RLC from the die bump to the BGA > balls. I also have the IBIS models of individual IO?s. > > On the die there is a connection from the IO to the Die Bump > for which I have the Spice netlist. > > 1) Is there a way to plug this spice netlist between the IO and > the die bump? > > 2) If not how do we consider the parasitics of this interconnect > on the Chip Level IBIS model? It cannot be done inside the .pkg file > as it contains the impedance values which are frequency dependent. > > 3) Can we use a spice file instead of .pkg file for package > modeling. If yes how? > > Any help is highly appreciated. > > Regards > > Aman > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > -------------------------------------------------------------------- > |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org > |with the appropriate command message(s) in the body: > | > | help > | subscribe ibis <optional e-mail address, if different> > | subscribe ibis-users <optional e-mail address, if different> > | unsubscribe ibis <optional e-mail address, if different> > | unsubscribe ibis-users <optional e-mail address, if different> > | > |or e-mail a request to ibis-request@eda-stds.org. > | > |IBIS reflector archives exist under: > | > | http://www.eda-stds.org/pub/ibis/email_archive/ Recent > | http://www.eda-stds.org/pub/ibis/users_archive/ Recent > | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > -------------------------------------------------------------------- > |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org > |with the appropriate command message(s) in the body: > | > | help > | subscribe ibis <optional e-mail address, if different> > | subscribe ibis-users <optional e-mail address, if different> > | unsubscribe ibis <optional e-mail address, if different> > | unsubscribe ibis-users <optional e-mail address, if different> > | > |or e-mail a request to ibis-request@eda-stds.org. > | > |IBIS reflector archives exist under: > | > | http://www.eda-stds.org/pub/ibis/email_archive/ Recent > | http://www.eda-stds.org/pub/ibis/users_archive/ Recent > | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis <optional e-mail address, if different> | subscribe ibis-users <optional e-mail address, if different> | unsubscribe ibis <optional e-mail address, if different> | unsubscribe ibis-users <optional e-mail address, if different> | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993Received on Wed Jul 8 10:33:58 2009
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