Hi mwtieg,
I have something to ask about balun, from the datasheet,
https://www.analog.com/media/en/technical-documentation/data-sheets/ADL5380.pdf
at pg 25 regarding the baseband output, it's stated that
"Each baseband pair has a 50 Ω differential output impedance. The outputs can be presented with differential loads as low as 200 Ω (with some degradation in gain) or high impedance differential loads (500 Ω or greater impedance yields
the same excellent linearity) that is typical of an ADC."
i am using a 1(primary):4(secondary) balun, that's mean the balanced signal is 4 and unbalanced signal is 1, i am wondering is the output impedance 200ohms?