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ADL5902 and highpass frequency (Formula 11)

Question asked by UweBonnes on Jan 15, 2018
Latest reply on Jan 15, 2018 by andy_m

To whom it may concern,


I doubt that formula 11 in ADL5902 Rev. B datasheet is correct.


For a typical circuit, like Figure 45, in my opinion the resistance determing the high pass frequency is the ADL5902 input resistance and not the global input resistance of 50 Ohm, as assumed in formula 11.