I plan to develop an FMC based on AD9684. The source of the clock frequency is AD9516-1. What kind of Clock Buffer would be better to put on FMC for AD9684 ???
How many parts are you fanning out to? The AD9508 is a good part as is the LTC6954.
only 1 part (ADC) and I do not need any dividers or adjustable delay, without any control just only buffer.
If you don't need to fan out the signal there is the ADCLK925.
A word of caution: if you are taking the clock off of a back plane it will be noisy. Using a buffer/repeater device without filtering the clock before will likely just amplify the noise on the clock signal and not improve the signal of interest because it will already be clipped. This will just degrade the jitter of the clock. Filtering the clock before the final amplifier will reduce the noise on the signal before it is amplified, and produce better signal.
Another option is to use a jitter cleaner PLL to clean up the noisy signal from the back plane.
Thank you very much for your recommendation!I already used the ADCLK905 chip and connected it as shown in the figure below, but unfortunately it did not work.
That's why I asked this question.
So at this connection of the chip we have:
1) Both of the outputs are independ of the input signal and have voltage level 1.6 V .
2) Vt = 1.4 V.
Maybe I have a mistake in this schematic please help with this trouble.
You need to terminate the output somehow. The datasheet recommend terminating with two 50ohm resistors tied to Vcc-2V. Currently there is no DC voltage for the outputs. With a Vcc of 2.5 you need a common mode voltage of 0.5 for the circuit to operate properly.
When you say the part isn't working are you not seeming an output waveform?
What is on the other side of C38 & C39.
Thank you for your help, Clarence!
Unfortunately I can not now check the option with resistors.
For the FMC AD9684 I'm going to use it this way:
is everything right here? Is there an option better than this?
Retrieving data ...