Category: Datasheet/Specs
Product Number: ADMV4420
On the ADMV4420 datasheet, p. 5 it shows the typical VCO tuning sensitivity, Kvco, to be 50 MHz/V.
But on p. 39 in the Loop Filter section it says that the loop filter on the eval board was designed with Kvco of 80 MHz/V.
Which Kvco value should I use when designing the loop filter for my application?
Related question - when I do the math for phase margin using the values in the Loop Filter discussion on p. 39, I get phase margin of 61 degrees. The datasheet says this circuit gives phase margin of 45 degrees. Please verify the 45 degree phase margin calculation and let me know if it is correct.
Thanks.
