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Design >> Mixed-Signal Design >> sigma-delta ADC linearity
https://designers-guide.org/forum/YaBB.pl?num=1143173923

Message started by jcpu2006 on Mar 23^rd, 2006, 8:18pm

Title: sigma-delta ADC linearity
Post by jcpu2006 on Mar 23^rd, 2006, 8:18pm

Hello:

I have a audio sigma-delta ADC,
when input =1Vpp, dynamic range > 80dB,
when input < 1mV, noise floor < -80dBV

Bt when input~10mVpp,
we have 2nd, 3rd, 4ht ...harmonics about -60dBV

Does anyone solve similar problem before? :-?