Does the AD9528 accept a sinewave as the input on VCXO_IN or only a square wave? It is not clear to me from the datasheet.
The AD9528 does accept a sine wave in the VCXO_IN. In this mode, the VCXO_INB pin should be AC grounded and the receiver mode should be set to differential. Table 4 in the AD9528 datasheet explains the minimum input amplitude and the minimum input slew rate for jitter performance. The noise performance of the AD9528 will likely be worse using a sine wave as opposed to a square wave, due to the lower input slew rate.
If noise performance is important, I would recommend using a high performance clock buffer in between the sine wave and the AD9528 input. The ADCLK905 would be a good option here. The input receiver of the ADCLK905 has better noise performance.
What pin number do you mean by VCXO_INB? Do you mean pin 12 which is the complement of VCXO_IN (pin 11)?
Thank you Steve for the helpful reply.
Yes, VCXO_INB is pin 12 as you mentioned.
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