Via Impedance Calculator | Sierra Circuits
Channel: Sierra Circuits
Date: 24/04/2024

The Via Impedance Calculator uses physical dimensions of a via to calculate its capacitance, inductance, and impedance. This tool supports two types of via models, through-hole and laser via. Each of these models has four via structures. Under through-hole you can see through-hole via with single and two reference planes and through-hole back drilled via with single and two reference planes.

Similarly, laser via models have blind vias with single and two reference planes and buried vias with single and two reference planes. You can choose the desired via model as per your requirement. In this demo, we choose through-hole via and single reference plane.

The units of the input parameters can be changed among mils, centimeters, millimeters and inches using the drop down.

The input parameters are height of dielectric one, height of dielectric two, via diameter, via plating thickness, anti-pad diameter, annular pad diameter, dielectric constant of the dielectric below the reference plane, dielectric constant of the dielectric above the reference plane, dielectric constant of the dielectric on the inner surface of the via, annular pad thickness, reference plane thickness, and via pad diameter.

Now let's enter the input parameters.

Next, hit calculate and the tool will display the values of capacitance, inductance, characteristic impedance, propagation delay, propagation delay per unit length, and effective dielectric constant.

If you'd like to know more about any of these input and output parameters, you can click on the respective Help button.

For instance, let's click on the help button adjacent to the via plating thickness field. The tool now displays a brief explanation along with the relevant via structure. Controlling the impedance, capacitance, and inductance of a via is an essential prerequisite to ensure signal integrity of your high-speed design. Sierra Circuits' Via Impedance Calculator enables you to compute optimum values of these parasitic elements based on the physical dimensions of a via.

Try the Via Impedance Calculator:
https://www.protoexpress.com/tools/via-impedance-calculator/?utm_source=youtube&utm_medium=social&utm_campaign=tools%2Bplaylist%2Bapr%2B2024

*******************************************

THE PCB DESIGNER'S CORNER

PCB forum SierraConnect:
https://sierraconnect.protoexpress.com/?utm_source=youtube&utm_medium=social&utm_campaign=feed%2B2024

Seminars and webinars:
https://www.protoexpress.com/events/?utm_source=youtube&utm_medium=social&utm_campaign=feed%2B2024

Design guides:
https://www.protoexpress.com/pcb-design-guides/?utm_source=youtube&utm_medium=social&utm_campaign=feed%2B2024

PCB design tools:
https://www.protoexpress.com/tools/?utm_source=youtube&utm_medium=social&utm_campaign=feed%2B2024

Sierra Circuits products and services:
https://www.protoexpress.com/products/?utm_source=youtube&utm_medium=social&utm_campaign=feed%2B2024

Follow us on LinkedIn: 
Amit Bahl, the PCB Guy: https://www.linkedin.com/in/amit-bahl-sierra-circuits
Sierra Circuits: https://www.linkedin.com/company/sierra-circuits-inc
SierraConnect: https://www.linkedin.com/showcase/sierraconnect/