Tech Tip: Calculating trace and via resistance for IR drop analysis

Analyzing IR Drop in PCB Designs

One common inquiry we receive from users involves calculating the resistance of traces and vias within CR-8000 Design Force. This calculation is crucial for understanding and mitigating IR (current-resistance) drop, which is essentially the voltage difference across a conducting trace.

The Impact of Resistance on Voltage Drop

Trace and via resistance play a pivotal role in determining the IR drop across a circuit. This voltage drop can significantly affect the performance of a component by weakening the power delivered to the pin of the component, ultimately impacting the overall functionality of the chip.