Consider the following circuit with a fully-differential amplifier (incorporating internal common-mode feedback) driving a perfect bipolar analog-to-digital converter (ADC). The ADC has bits.

The ADC operates with an input differential signal (as indicated in the figure) in all the dynamic range, i.e. the range of its power-supply from to , with .

The differential signal is obtained from a sinusoidal voltage according to the gain that provides .

The ADC input filter circuitry only removes unwanted high-frequency noise, avoiding aliasing, hence not affecting the input signal amplitude for the operating frequency considered.

Assuming , obtain the signal-to-noise ratio, SNR(dB), at output of the converter.