I am trying to use an AD9057 analog-to-digital converter (-80 grade) with an Encode Clock of 80MHz, 3.3V square wave.
I get a terrible clock return on the input signal itself. If I monitor the input signal, for example a 1Vpp sin waveform at 3 to 10MHz, I get clock noise on the signal to be converter itself, so high that the conversion results really noisy as well.
I cannot find on the market the Evaluation Board depicted into the IC's Datasheet to try with an optimal PCB.
I then tried to separate the AD from the driving board, leaving it alone on a PCB and providing the clock externally. Same noise.
Can you please advise about this issue ?
Can you suggest a different 8, 10 or 12 bit AD converter capable of working with an Encode clock of 80MHz and input signals ranging from DC to 10MHz, with an available Evaluation Board ? In this case I will need to get the converted byte and fed it into a FIFO memory, thus I cannot arrange the complex Analog Devices data acquisition setup, but rather get a "simple" Eval Board with just input and encode connectors and output pattern pins (the AD9057 if existing, is optimal in this sense: no register programming is needed, just providing the encode clock).
Many thanks in advance,
The recommended alternatives with active Eval Brds would be the AD9609(10b), AD9629(12b), or AD9649(14b) low power ADC family. Eval Brds are avail for the 80Msps speed grade for each model. The EVB's can also be operated at lower CLK frequencies if desired. The Device and Eval Brd info is avail here: