A/D converter quantization noise

1. What is ADC quantization noise?
2. How do you calculate quantization noise of ADC?
3. Why there is noise in your data from the ADC?
4. How can we prevent quantization noise?
5. What is quantization in DCOM?

What is ADC quantization noise?

Quantization noise is a model of quantization error introduced by quantization in the ADC. It is a rounding error between the analog input voltage to the ADC and the output digitized value. The noise is non-linear and signal-dependent.

How do you calculate quantization noise of ADC?

With a uniform amplitude distribution, the quantization noise power is equal to LSB212 L S B 2 12 . The power spectral density of the quantization noise is frequency independent (it's white noise). For a sine wave, we can find the maximum SNR of an ideal N-bit quantizer as SNR=1.76+6.02N.

Why there is noise in your data from the ADC?

The reference source, whether integrated into the ADC or provided as an external discrete component contributes some level of noise. Since the ADC compares the input signal to the reference voltage, this noise appears in the output result as well. The output ripple on a power supply may introduce noise into the signal.

How can we prevent quantization noise?

Oversampling reduces the quantization noise power contained within the input signal bandwidth. In digital signal processing applications, a digital low-pass filter at the A/D output could be used to effectively remove the quantization noise which is contained in the unwanted part of the Nyquist bandwidth.

What is quantization in DCOM?

The digitization of analog signals involves the rounding off of the values which are approximately equal to the analog values. The method of sampling chooses a few points on the analog signal and then these points are joined to round off the value to a near stabilized value. Such a process is called as Quantization.