Hi,
I am going to use ADA4030-24 which prefer driver is ADA4945-1 and ADA4896-2 combination. The ADA4945-1 need to terminate a single-end input, and get a circuity as Figure-109 in the datasheet. But in my design, how could I define the Rs if the source of ADA4945-1 is from a ADA4896-2 output. If I can’t define the Rs, then I can’t get the Rt value.
Another question is if I don’t care the terminating, and use below LTSpice circuity to simulate. Then the ADA4945-1 differential output is double of the ADA4896-2 output. That make sense because Rf/Rg is 2. Why it has to terminate the single-end input? May I use my circuity in LTSpice without terminating? because the results looks good. Is there any risk?
figure 109 in datasheet:
my LTSpice circuity :
Regards,
Shu