about SC OTA input common range?

[qslazio]

I'm designing a sigma-delta modulator with switch capacitor network.
I'm wondering how large the CMRR can I set for the OTA I'm going to design.
Anyone can give me some advice?
Thanks

 

[wee_liang]

Why bother to set the CMRR specs when you haven't figured out it's impact in the modulator?

Might as well just design the OTA first, then determine the CMRR.

 

[noiseless]

depends your ota topology