i need to design an op- amp for a 10 bit adc.
the expected gain of the ADc is about 80 DB.The first stage is a folded cascoded and the 2nd stage stage is class AB.Input voltage :1 vpp. design is to be done for 1.8 V supply voltage.someone please help me..

 

Try a Max480 op amp

 

Maxim for one has several opp amps that work down to 1.8V.

I would advise you not to try to get all 80dB of gain out of one stage.

 

thank you for helping out..but can you help me with the basic steps to design such an op-amp??