Differential Impedance Calculator
Current version: 3.5

NEW: Version 3.5 now has expanded input ranges for users who found the original ranges too limiting.

SEE: How Version 3.5 compares to other calculators. In the December, 2015 issue of PCD&F there was an article titled "Field Solvers for TRANSMISSION LINE ANALYSIS: How Similar are They?" Six different high-end transmission line solvers were compared to each other. (You can read the article here: http://www.pcdandf.com/pcdesign/index.php/magazine/10472-simulation-1512.) We thought you might be interested in seeing how UltraCAD's  UCCALC.exe Differential Impedance Calculator compared with the more expansive solvers. Check here:

UltraCAD's new Differential Impedance calculator will calculate single-ended and differential impedance for the common configurations we all deal with:

            Microstrip
            Embedded Microstrip
            Stripline
            Edge-coupled Asymmetric Stripline
            Broadside-coupled Asymmetric Stripline

Given a value for impedance, it will (in most cases) calculate the other variables we need during the design process. So it will help answer questions like:

        What width trace do I need to hit a 75 Ohm differential impedance?
        How far apart do my planes need to be?
        How sensitive is my design to variations in Er?
        Will a change in trace thickness impact my design?

In addition, the calculator calculates propagation time, Co, and Lo for the traces. It also calculates common mode impedance.

Go to this page to download the Operator's Manual. The Operator's Manual is a *.pdf version of the help file and describes the calculator in detail, including its specifications.

Go to this page for some screen shots of some sample calculations.

This calculator is designed to run on Windows 98/ME/NT/2K/XP/VISTA/Win7, 32 bit and 64 bit versions.

Click on logo to return to UltraCAD's Calculator page.