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For bipolar input ADCs, this is the deviation of the first code transition from the ideal -FS + 1/2 LSB after Bipolar Zero Error has been adjusted out.
Where Z is the input impedance, FS is the full scale of the device for the frequency in question, SNR is the value for the particular input level and Signal is the signal level within the ADC reported in dB below full scale. This value includes both thermal and quantization noise.
Noise spectral density is the integration of the DAC noise power into a small frequency band. It is measured in dBm/Hz or nV/rHz.
Is a possible deviation of RAB from its ideal value measured as a percentage.
This theorum says that if a continuous bandwidth-limited signal contains no frequency components higher than fC then the original signal can be recovered without distortion if it is sampled at a rate of at least 2 fC. This theorum applies to A/D converter applications as well as data transmission density over limited-bandwidth channels.