Adc noise calculation

1. How do you calculate ADC noise?
2. How do you calculate RMS noise with ADC?
3. How do you calculate SNR of ADC data?
4. How is noise factor calculated?

How do you calculate ADC noise?

Calculate 10 × log (f_SAMPLE/2) = 10 × log (65Msps/2) = 75.1dB. The converter's normalized Nyquist band noise power is found by subtracting 75.1dB from -66dBm resulting in -141.1dBm in a 1Hz bandwidth. The resulting effective ADC noise figure = -141.1dBm - KTB = -141.1dBm - (-174dBm) = 32.9dB.

How do you calculate RMS noise with ADC?

The equation given for the ADC noise requires the full scale RMS input voltage. The full scale range is 5 volts for this converter. The full scale range corresponds to the peak-to-peak input. To convert this to RMS, we divide by 2 and multiply by 0.707.

How do you calculate SNR of ADC data?

SNR is a calculated value that represents the ratio of rms signal to rms noise. You then multiply the log₁₀ of this ratio by 20 to derive SNR in decibels. As I mention above, an ADC's ideal SNR equals 6.02N+1.76 dB, where N is the number of bits. You derive this formula by first defining the rms signal.

How is noise factor calculated?

The noise figure depends on these parameters, the circuit topology, and the value of external components. If you have all this information, noise figure can be calculated. = kT = –174 dBm/Hz, where k is Boltzman's constant and T = 300 Kelvin).