Impedance Calculator
Calculate controlled impedance for high-speed signal traces on PCBs.
Results:
Single-ended Impedance:
Differential Impedance:
About this Calculator:
This Impedance Calculator helps you calculate the controlled impedance for high-speed signal traces on PCBs. By providing the dielectric constant, trace width, trace thickness, and distance to the ground plane, you can determine the single-ended and differential impedance values. This tool is essential for ensuring signal integrity in high-speed PCB designs.
How to Use:
Enter the dielectric constant (εr), trace width (in mm or mils), trace thickness (in oz/ft²), and distance to the ground plane (in mm or mils). Click "Calculate" to see the impedance values and a graph showing the relationship between trace width and impedance. Use the "Reset" button to clear the inputs and start over.
Equation Used:
Single-ended Impedance (Ω): \( Z_0 = \frac{87}{\sqrt{\epsilon_r}} \log \left( \frac{5.98 \times h}{0.8 \times w + t} \right) \)
Differential Impedance (Ω): \( Z_{diff} = 2 \times Z_0 \times \left( 1 - \frac{0.48}{\sqrt{\epsilon_r}} \right) \)
When designing high-speed and high-frequency PCBs, ensuring proper impedance control is critical for signal integrity. A PCB Impedance Calculator is an essential tool for engineers and designers to calculate the characteristic impedance of traces, ensuring minimal signal reflections and optimal performance. Alongside impedance calculations, tools like the PCB Trace Width Calculator help determine the optimal trace width to handle current without overheating. For analyzing power loss and voltage drop, the PCB Trace Resistance Calculator is invaluable. Additionally, the PCB Via Size and Current Capacity Calculator ensures vias can handle the required current and thermal load. For thermal management, the PCB Heat Dissipation & Thermal Resistance Calculator helps designers optimize heat dissipation and prevent overheating. These tools, combined with a PCB Impedance Calculator, form a comprehensive suite for designing reliable and efficient PCBs. Whether you're working on high-speed digital circuits, RF designs, or power electronics, these calculators are indispensable for achieving optimal performance and manufacturability.
