14.5*) The SNR due to quantization can be calculated as follows. For an N-bit ADC, with a voltage range of E, there are \(2^N\) quantization levels, and so the maximum noise level is \(E/2^N\). The maximum signl is \(E\), so the SNR is \((1/2^N)^2\). The extra square is because of converting from voltage to power.
For N = 8, this gives an SNR of about -48 dB
For N = 16, this gives an SNR of about -96 dB