Digital filter equivalent number of gates estimation

[shpongle]

Hi,

My background is analog. I need to estimate roughly the number of equivalent gates of a digital filter, a decimator for delta-sigma ADC converter.
Is there a "best practice rule" to estimate this number based on the filter order, word length, ... ? Or do I have to design this filter, write some VHDL or Verilog and run through a synthesizer EDA tool ?
Thanks

 

[kelvin_bao]

I am interesting in you delta-sigma ADC ,can you share some documents with me, thank you very much!

 

[shpongle]

GO to

http://www.imse.cnm.es/esd-msd/deliverables.html

A lot of interesting stuff there

 

[merkury]

it seems to be useful for us