# PCB impedance calculator – Single ended / Differential pair

PCB manufacturer normally provides information about PCB stackup and track geometry.

In case you need to calculate single ended or differential pair impedance on your PCB, try following links:

I use Microstrip & Stripline calculator developed by Jean Nicolle
http://www.jnicolle.com/?page=LVDS

or try this Online PCB impedance calculator at
http://www.skottanselektronik.com/
This link also has a track maximum current calculatorcrosstalk calculator and thermal via calculator.

One of the bests is this FREE Saturn PCB Design Toolkit:
http://www.saturnpcb.com/pcb_toolkit.htm

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## 9 thoughts on “PCB impedance calculator – Single ended / Differential pair”

1. Jasmin Smith says:

I never thought there is such kind of calculator well technology could be really surprising sometime, I am only aware with scientific calculator, graphing calculator, an ordinary one and a mortgage calculator.

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2. Paulus2001 says:

you should take a look at Saturn PCB tools. it is really interesting with tons of features next to the obvious like impedance

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3. Bhagath Ch says:

Hello, I’m confused about which calculator to use for Microstrip line. According to Saturn PCB tools Z0=84.45 Ohms for the following specs:
Conductor width=10mils, Conductor Height=18mils, Base copper weight= 1 oz, Plating Thickness= 1 oz.
When I use Jean Nicolle calculator Z0=89.6 Ohms. Which is more reliable?

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1. I mostly use Saturn PCB, but don’t forget, this is only approximate calculation. You always need to get the numbers from your PCB manufacturer, only they can calculate it correctly.

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1. Bhagath Ch says:

Thanks for the advice. 🙂 Also can you tell me if I leave 3 times the trace width as the gap for a microstrip line will it be sufficient enough to reduce the coupling? And if the gap is more that that will a CPWG act as a microstrip?

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2. Bhagath, have a look at a Crosstalk calculator (e.g. Saturn PCB). Crosstalk also depends on dielectricum thickness, and some recommendations I read are to keep gap 3-5 times dielectricum thickness (not track width). Depends on your PCB and circuit. Hope it helps.

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