Hi,

Starting from the sigma-delta modulator parameters (sampling frequency, oversampling ratio and resolution) what's the noise budget to be considered for the operational amplifier, capacitors and reference voltages design?

Once the maximum noise power specs have been individuated, what's the integration bandwidth to be used in the blocks verification by simulation?

(starting from the power spectral density and calculating the noise power by integration).

In example:
Assuming the max op. amp. noise power to be vnmax^2, what's the integration bandwidth to evaluate the actual noise power vn^2 of the designed op. amp in order to verify vn^2 < vnmax^2?

Many thanks, Matteo