Hi,
for sensor application, I've to design a 12bit(minimum) Sigma delta ADC.
I have some questions..
I guess lots of sigma delta modulators are using a fully differential opamp for integrator.
Do I have to use fully differential opamp for 12 bit resolution?
I focus on low power and low voltage ( vdd = 1V) ,
so I think fully diff-opamp doesn't fit..
How many order do I need? ( how about 3rd order & single bit?)
Do I have to use Fully differential opamp?
There are plenty of books and papers that tell you how to calculate the order of a delta-sigma adc and - since you are asking this question - you should read a few of them before starting your design...