Fundamentals of Power-Integrity Measurements (Download)

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Power integrity is of critical concern for embedded-system designs, extending from a power-distribution network’s (PDN) power rails on a printed circuit board to its integrated circuits. Taking steps to maintain power integrity will ensure that voltage noise levels remain within the tolerances required for the various devices that make up your design.

As a rule of thumb, logic components can tolerate disturbances of 5% of the rail voltage. For higher-speed digital components such as transceivers, tolerance drops below 5%, while for mixed-signal, analog and RF components, tolerance drops below 1% of the rail voltage.