Area of application of high gain opamp

[rishabh_31ec]

Hi, I have designed an opamp of gain 120dB and ugb in the range of 2-3 MHz with power consumption nearly 0.5 mw and settling time is in the range of 200 ns with a single power supply of 1.2V.
I have a query that which area needed such an opamp specification........
I have read papers on high gain low power opamp but my query is still unsolved.

 

[yadavvlsi]

May be below link help you.
**broken link removed**