Tips and Tricks for Optimizing Low Power Measurements

This technical brief reviews some of the fundamental performance trade-offs with voltage probes, current probes, and oscilloscopes, and then summarizes with a couple of practical examples.


Low-power measurements are becoming increasingly important in many line-powered and battery-powered applications, yet many engineers and technicians find it difficult to accurately make these measurements. Although most power measurements simply consist of the mathematical product of the voltage across a device and the current flowing through the device, good low-power measurements require a detailed understanding of oscilloscopes and probing.