Hello..good morning
I am new to this forum..please help me in this regards which is mention below regarding to make an ideal operational ampifier

i am working on ADC as my M-Tech project.I need to do behavioral simulations for ADC to observe the required SNR. I need one ideal opamp to use in the design. i am using cadence virtuoso/spectre for simulation.
Could you tell me how to make an ideal opamp or is there any ideal opamp in any library.I tried for 15 days..I could not make or find proper solution..I used VCVS model and Opamp which is available in ahdlLib ,but it is not giving the proper output when i am using for the integrator..Please help me..

Thank you