Power-supply noise can degrade clock jitter and affect the performance of every component in the signal path. Supply noise problems are usually found late in the design cycle and can necessitate expensive redesigns and cause painful schedule delays.
Maxim clock generator ICs have the best power-supply noise rejection in the industry and minimize the risk of project delays due to supply noise problems.
Switch-mode power supplies: Switching frequency is typically 200kHz and the amplitude can be as much as 40mVP-P.
Digital ASICs: Switching transients inject current noise into the supply. Current noise is converted to voltage noise by the loop inductance of the supply decoupling. ASIC switching transients depend on packet processing so supply-related failures can be difficult to diagnose. TCAMs are especially noisy because they compare every memory cell at once and inject large current spikes.
Total supply noise for the example above can be computed as follows:
