Question
Concerning the SYSCLK input, I have a single-ended clock signal in CMOS 3.3V
format and I'd like to know what's the best way to connect this clock to the
SYSCLK inputs?
Answer
SYSCLK accepts 1.8V CMOS single-ended. However, you can setup the 3.3V CMOS
clock as per Figure 34 in the AD9957 datasheet:
http://www.analog.com/static/imported-files/data_sheets/AD9557.pdf