What is the reference phase noise requirement on the ADRF6755?
It really depends what 1/f phase noise you require. In the characterisation of the part, an SMA100 was used as the reference input to ensure that the phase noise of the reference had no impact on the ADRF6755 phase noise. The phase noise of the reference needs to be at least 40dB lower than the ADRF6755 1/f phase noise to have little to no impact.
Ok, thank you for the information. The data sheet did not have any information on what reference was used.
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