How to calculate SNDR for a second order sigma delta

[tatakt]

Hi,
I have designed a second order sigma delta for sampling frequency of 12.8MHz and OSR=256 in Hspice. I don't know how to calculate the SNDR. I mean how to set these parameters: input frequency,transiation step and N (# of fft points).
Thank you in advance,
tatakt

 

[noiseless]

try to find IEEE standard about adc testing

Added after 5 minutes:

I uploaded as below

 

[mitgrace]

Does you have the Matlab code ? If I get the SDM out , I want to do SNDR .. Thanks

 

[swethapr565]

hi
i need second order sigma modulator in synopsis ... so can u please send me some of the sample code of second order sigma delta modulator in hspice

 

[Zhanger]

Does you have the Matlab code ? If I get the SDM out , I want to do SNDR .. Thanks

You can check the famous delta-sigma design toolbox by Schreier
Delta Sigma Toolbox - File Exchange - MATLAB Central