I want to know the input capacitance.
At the date-sheet , it says that the typ is 4pF.
But I saw the Ibis-model and also saw figure5 in the application-notes(AN-715).
C_pkg 1.00pF 0.50pF 2.00pF
C_comp 1.00pF 1.00pF 1.00pF
So, my understand is
typ = C_PKG_typ + C_COMP_typ = 2pF
min = 1.5pF
max = 3pF
And this value deviates from specifications.
Which value is correct? 4pF-typ or 2pF-typ.
I think that the value in the datesheet is a specification and the value in the IBIS is the measured value.
Maybe the deviates between datesheet and IBIS is the deviation between theoretical values and actual measurements
but I am interested why these two values become estranged.
Would you advise it which I should believe?