Hi Andrew, For high rate signaling it won't matter that much if you choose 0201 caps over 0402. For 0201, the ESL of just the capacitor alone (excluding the artifacts associated with the mounting on a PCB) is in the order of 400pH. For shape of 0402, it is ~550pH. Remember that the impedance of the bulk capacitance and the series resistance (ESR) are negligible when it comes to high speed signaling. Furthermore, you will not benefit from reducing the package but instead what you should be doing is reducing the parasitic-shunt capacitance of the 0402 structure (shape a void area in the plane underneath) and target the effective impedance to match your transmission line. Hope it helped.. Boris Bakshan. On Wed, Jan 7, 2015 at 8:32 PM, Andrew Holme <andrew@xxxxxxxxxxxxxxxxxx> wrote: > Can anyone recommend by manufacturer's part number an 0402 size 100nF AC > coupling capacitor for use in a DisplayPort Main Link at 5.4 Gbps? Many > 0402 size 100nF caps have self-resonant frequencies in the tens of MHz > range. We would consider 0201 devices but shy away from 01005. The VESA > spec says min 70 nF to max 265 nF is the allowable range of values for AC > coupling caps in the main link. I presume such large values are required > because of DC wander? > > TIA > Andrew. > > ------------------------------------------------------------------ > 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 forum is accessible at: > http://tech.groups.yahoo.com/group/si-list > > 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list 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