Tool/software:
I need an external input of 10M (OSCin) and an output of 1536M clock to the ADC chip, but there is a out of lock issue.
Testing has found that when an external input clock of 100M is used, LMK04821 can lock normally, and the frequency measured by the spectrometer output is also correct; When the external input is 10M, I found that LMK04821 tends to lock as the amplitude increases. When I tested it, I gave it from 0dBm to 10dBm. When I gave it 10dBm, the lock could occur, but it would out of lock. I did not test for higher amplitudes. When I gave 10dBm, I observed that the output frequency 1536M on the spectrum was also the expected frequency, but in fact, there would be frequency deviation when the amplitude was measured;
My question
① Can the register values configured using software tools match the external 10M input;
② Can the external 10M input be matched by modifying the register configuration of LMK04821 (such as matching resistor resistance or filter resistance)
③ How should the OSCin/OSCin * pin of LMK04821 be terminated on external hardware in a conventional design? Currently, we have a single ended input (from OSCin)
