can this OPA been designed?

[jodenma]

hi,i need design a OPA,
the technology is 0.25um,
the single supply is 2.5v ,
common input is 1.25v,
the VDD current cann't beyond 50uA, the PM is 30,
in these condition i neet the gain at 1MHZ is 40DB ,For this OPA I don't know how to design, and use what't kinds of structure? please help me.
TKS!

 

[mists]

the 30 PM is too samll and what is output loading?

 

[borodenkov]

what is the output load??

What are the requirements for output swing? SR?

 

[jodenma]

yea,the output load is 1p,and the output swing require 0.25v~2.25V,
BTW,this OPA be used in SC circuit.

 

[borodenkov]

30 degree PM is for sure too small for SC!

Do you mean singe-ended swing of 0.25~2.25?? I do not think you can design it..

 

[jodenma]

yea,i know the 30 degree PM is too small for SC.but if designing PM is 60 degree,then i think i can't design it,maybe its current can increase to 1mA.
i wish the singe-ended swing is 0.25~2.25V,if this can't be achieved ,maybe can use dual-ended output.