Attached document shows design example using discrete components. It is very hard to get single pF in discrete Capacitor, so it's natural to use values in nF range.
In contrary, in IC world is hard to achieve more than single pF, so conclusion is simple. If you want to copy discrete design to IC, scale components - caps down, resistors up.
You can move opamp nonidealities (finite gbw) to feedback elements. This few hundred MHz GBW ensures gain >40dB at fc making filter insensitive to opamp parameters (at least with tolerance better than 1%).
Your process has ft on level of 10GHz for NFETs, so 500MHz UGF is achievable by single stage. With 1mA current consumption, simple Miller OTA can get at least 70MHz driving 10pF with 60deg phase margin.
The problem I can't use single stage OTA because I need to drive resistive feedback load,
you have stated that two stage Op-Amp can get at least 70 MHz with 10 pF, which still far away from value like 270 MHz or 653 MHz, if you suggesting me to reduce the feedback capacitive vlaues it might be managable but in the same time I can not ignore the load from the next stage ADC that is in the order of 10 pF.
Please see the below image, of the filter given by the manual, considering these values in figure (A), I need your help to have an approxiamation values in Fig (B), this will help me to design an accurate op-amp.
If you want to optimize amplifier for speed, check for what biasing condition your mosfets reaching peak ft. Testbench can be found both on this forum and cadence blogs as well.
As for your other question - the feedback network is there to realize your function, in this case a filter. I think you can safely split the problem in two parts. An opamp with given UGBW and the feedback. Most often the UGBW is defined by the compensation capacitor in the opamp, not by the load. The load affects the non-dominant pole. But in complicated circuits these effects can be best seen with simulations.
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