AD9911 evaluation board has 50 Ohm termination for each single end, total of 100. And there is a 50:50 Ohm balun afterward. Isn't it supposed to be a 100:50 Ohm balun?
Check out these documents.
AD9910 balun transformer
AD9910: output circuit clarification
Although these documents are for the AD9910, I think the same goes for the AD9911.
Could I use single ended without transformer in AD9911?
I would like use only one of pin35 or 36 be a single ended output because transformer should be limit the wide band frequency output ,tks!
Anyone can answer me?
If O/P frequency is below 1kHz and it maybe without transformer at output port.
How can I generate lower frequency ?
The AD9911 is capable of having output frequency as low as 0.12Hz, so output frequencies below 1kHz is possible. Using the current outputs as single-ended individually would result to lower current level since the sum of these two outputs is equal to the full-scale output current. As for the transformer, it is just used to convert the differential outputs to single-ended and also for impedance matching.
Thanks for your feedback.
Another question as below , could you please provide some input in advice,tks!
There is another problem.
The jitter of AD9911 output is acceptable in Hi-frequency, but poor in lower freq, such as 1MHz.
(Jitter @Hi-Freq <60ps, Jitter @1MHz >1ns)
I believe that’s because lower slew rate in lower frequency.
Have any suggestion to improve the jitter performance in lower frequency?
Retrieving data ...