DIP socket capacitance - QuickField simulation example
Engineering question
How to find parasitic capacitance between DIP connector pins?
Answer
Set up a 3D QuickField Electrostatics problem for a DIP connector structure and evaluate parasitic capacitance between pins from computed field results.
Typical applications
DIP package sockets, PCB connectors, pin header assemblies
Download
- Download simulation files (files may be viewed using any QuickField Edition).
Simulation problem
Problem Type electrostatics.Geometry 3D Import
All dimensions are in millimeters
Given
Relative permittivity of dielectric ε = 3;
Task
Calculate the capacitance between two adjacent pins #1 and #2.
Solution
To calculate the capacitance we assign electric potentials +0.5 V to the pin #1 and -0.5 V to the pin #2. QuickField calculates electric field energy W in the entire space.
Capacitance is then calculated as:
C = 2*W / (V+ - V-)²
Results
Electric field energy W = 1.4e-13 J.
Pin #1 to pin #2 capacitance
C = 2*1.43e-13 / 1² = 2.8e-13 F (0.28 pF).
Electric field stress distribution between two energized pins:
Video
- DIP socket capacitance. Watch on YouTube