Education Library

Frequently Asked Question

May I use the AD9540 for spread spectrum clocking?

The AD9540 is capable of doing a frequency sweep function which can be used for the EMI reduction technique called Spread Spectrum Clock Generation. A triangular waveform is easy to achieve using the frequency accumulator available on that product. Non-triangular waveforms can also be constructed using the profile registers to drive changes to the "Delta Frequency Tuning" word which is used by the frequency accumulator.