Layout Experience
Hi Kumar...
As said by the previous post, a very good starting point (for the usual analog layout issues) is Alan Hasting's Art of Analog Layout.
To give you a very simple and quick start, there are two MAIN factors to consider when laying out analog (also mixedsignal) ICs: Temperature variations (gradient) and package stress (both of them across the chip).
As I said before, MAINLY you design focused on minimize the effects of that factors in your final product.
That's why, again, two things are key in analog layout:
1- An excelent floorplanning. It's really important how you place your blocks in order to make sure and know where your bigger power dissipation device is located and how iso-thermal lines will be present in your die, that's the base for the "second" point:
2 - MATCHING. Yes, in uppercase... Matching techniques usage, more in particular sensitive stages is a MUST!
Hope this helps to give you the requested idea...
PS: Hard and difficult, but nothing to kill yourself about it... In my group I already have guys comming from the "digital world" and they where up un running very soon...