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White Paper: Electronics & Computers

Five Techniques for Fast, Accurate Power Integrity Measurements


Rail voltages are getting smaller, and tolerances are decreasing. As a result, making accurate power rail measurements has become much more difficult. In the past, any oscilloscope was able to measure ripple on historical 5 V rails with 10% tolerance, since the 500 mV requirement was well above the noise level of the oscilloscope.

Industry dynamics are driving both a decrease in rail voltage values as well as tighter tolerances across a wide range of rails. Making an accurate ripple measurement on a 1 V rail with 2% tolerance, for example, is difficult on all oscilloscopes. This guide describes five tips for making accurate power integrity measurements with oscilloscopes.

The five tips include how to adjust viewing characteristics, how to choose an oscilloscope that has low noise, achieve sufficient onset, evaluate switching and EMI, as well as accelerate measurement time.

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