I want to use ada4938-1 to drive the ADC ad9629, before we start the design, I do the simulation of ada4938-1, but I met some problems when I do the simulation.
software: Orcad PSpice
the steps of simulation:
First , I get the ada4938.cir on the website, and generate the ADA4938.lib and ADA4938.OLB by Module Editor
Second , draw the schematic:
1)the schematic used the THEORY OF OPENRATION in ADA4938 datasheet. Input = 2Vpp,10MHz sine wave, gain 1V/V ,output should be 2Vpp
Then start the simulate, but simulation stop and appear follows
So, I change the setting to 0.1 in the red rectangle,and get result,but the result is not consistent to theory. I guess the bad result is related to the setting
So is there the mistake in the steps of simulation or in the schematic? I hope you can give me some suggestion or right steps.
Thanks for your kind consideration and looking for your early reply.