ADS1259: SNR of ADS1259 is negative value

Hi Kailyn,

Could you provide more information about the signal you are trying to measure? Are the ADC inputs shorted, or are you testing with an AC signal?

Upon initial inspection of the FFT, it would appear that you are only looking at a noise signal (since the largest spur is only 9.1 dB higher than the noise flow). In this case ADCPro is taking the largest noise spur and calling it your "signal"; however, since the total noise power is larger than the "signal" power, the SNR is negative.