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SMS's avatar
SMS
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7 years ago

Impedance Matching for differential tracks

The Max 10's LVDS IO user guide mentions matching trace impedance with that of termination resistor. However in the figure given below they have mentioned single ended trace impedance of each of the ...
Abe's avatar
Abe
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7 years ago

The termination scheme used in LVDS lines forMAX10 follows a 3-resistor or single-resistor external termination scheme. You can refer to the following LVDS termination guide lines for more information.

https://www.intel.com/content/www/us/en/programmable/documentation/sam1394433606063.html#sam1394436219455

So, when you use the scheme mentioned above you will have to keep the line impedance at 50ohm and 100ohm and then calculate the values of Rs/Rp depending on the type of scheme used.