Lee, the vendors dimensionally detail land pad 'recommendations' for X2Y, but
stay away from dimensioning specific via layouts. Scroll down to Johanson's
'PCB mounting' tab at this link:
http://www.johansondielectrics.com/x2y-filter-decoupling-capacitors#pcb ;
Below the land pad dimensions, Johanson shows 'stick' figure via layouts in the
PDN Bypass applications section, notice the 'recommended' and 'poor' layout
depictions, no dimensions. If any vendor sent you, or you downloaded a vendor
document specifying the poor layout please send it to me. Steve would not
specify that poor layout as you suggest, these early 2004-05 papers are just a
few examples of the low inductance he preached:
Bypass Capacitor Inductance, Data Sheet Simplicity to Practical Reality
http://www.ipblox.com/pubs/DesignConEast_2005/DesignCon%20East%202005%20TF2_ipb.pdf
Considerations for Capacitor Selection in FPGA Designs
http://www.x2y.com/publications/decoupling/mar21-05.pdf ;
-Dave
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Lee Ritchey
Sent: Friday, March 11, 2016 1:07 AM
To: tom@xxxxxxxxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx; 'Ray Anderson'; cristian.gozzi@xxxxxxxxx;
Charles.Grasso@xxxxxxxxxxxx; 'Ray Anderson'
Subject: [SI-LIST] Re: X2Y equivalent circuit model
The board layout complied exactly with what was specified by the vendor. I
believe that that layout was specified by Steve. IT looks like what is on his
test PCB.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Tom Dagostino
Sent: Wednesday, March 9, 2016 10:19 AM
To: leeritchey@xxxxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx; 'Ray Anderson' <raya@xxxxxxxxxx>;
cristian.gozzi@xxxxxxxxx; Charles.Grasso@xxxxxxxxxxxx; 'Ray Anderson'
<ray.anderson@xxxxxxxxxx>
Subject: [SI-LIST] Re: X2Y equivalent circuit model
Lee you know that board was not the optimal layout. Steve told you it was
incorrect.
Tom Dagostino
Tom Dagostino
Teraspeed LabsOn Mar 9, 2016 8:30 AM, Lee Ritchey <leeritchey@xxxxxxxxxxxxx>
wrote:
------------------------------------------------------------------
We mounted the X2Y capacitors exactly as specified in the applications
notes provided by the vendor.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Grasso, Charles
Sent: Monday, March 7, 2016 7:46 AM
To: leeritchey@xxxxxxxxxxxxx; cristian.gozzi@xxxxxxxxx; 'Ray Anderson'
<ray.anderson@xxxxxxxxxx>; si-list@xxxxxxxxxxxxx
Cc: 'Ray Anderson' <raya@xxxxxxxxxx>
Subject: [SI-LIST] Re: X2Y equivalent circuit model
Hello Lee - What method is used for a capacitor to be properly
mounted? So, if an X2Y capacitor is properly mounted the <insert
metric here> will not improve?
Best Regards
Charles Grasso
Compliance Engineer
Echostar Communications
(w) 303-706-5467
(c) 303-204-2974
(t) 3032042974@xxxxxxxxx
(e) charles.grasso@xxxxxxxxxxxx
(e2) chasgrasso@xxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Lee Ritchey
Sent: Saturday, March 05, 2016 5:44 AM
To: cristian.gozzi@xxxxxxxxx; 'Ray Anderson'; si-list@xxxxxxxxxxxxx
Cc: 'Ray Anderson'
Subject: [SI-LIST] Re: X2Y equivalent circuit model
Our tests show that the X2Y capacitor is no better than a properly
mounted
0402 capacitor.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Cristian Gozzi
Sent: Friday, March 4, 2016 10:57 AM
To: Ray Anderson <ray.anderson@xxxxxxxxxx>; si-list@xxxxxxxxxxxxx
Cc: Ray Anderson <raya@xxxxxxxxxx>
Subject: [SI-LIST] Re: X2Y equivalent circuit model
Thanks
it worked ;-)
Regards
Cristian
Il giorno gio 3 mar 2016 alle ore 10:04 Ray Anderson <
ray.anderson@xxxxxxxxxx> ha scritto:
Cristian-attachments immediately.
Johanson Dielectrics has downloadable spice models available from
this web
page:
http://www.johansondielectrics.com/x2y-filter-decoupling-capacitors
download link:
http://www.johansondielectrics.com/downloads/JDI_X2Y_H-Spice_Files.z
ip
They should be usable in ADS using the ADS 'Hspice Compatibility
Component' Wizard. (in fact I just confirmed that they import OK).
-Ray Anderson
Xilinx Inc.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Cristian Gozzi
Sent: Thursday, March 03, 2016 9:07 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] X2Y equivalent circuit model
Hi Si expert
I was looking for a good circuit model for X2Y capacitor to be used
in my ADS circuit simulation
on internet I found this
http://www.x2y.com/bypass/X2Y%20Equivalent%20Circuit%20for%20Models.
pd
f
but when I tried to implemented it, something was wrong The
impedance vs freq. shapes on log/log scale does not seem correct
can someone give to me any feedback or good reference to look for?
thanks in advance
Regards
Cristian
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