Contents
What kind of signal can an audio ADC capture?
An audio ADC is expected to work reasonably well at capturing audio signals in a range which does not extend to DC and typically doesn’t go as high as many general-purpose ADC devices.
How many comparators do I need for an ADC?
When an ADC is used in a control loop, it’s important to minimize the the delay through the ADC, but when delay is acceptable it allows the hardware of the ADC to be simplified. An 6-bit ADC that needs to yield “instant” results will need 63 comparators, and an 8-bit one will need 255.
What’s the sampling rate of a 16 bit ADC?
A 16-bit sample-and-hold needs to sample the input to an accuracy of about 0.001% (!). Accuracy, namely signal settling, takes time. So, an Audio ADC is typically 16-24 bits, and has an effective sampling rate of 44kHz to 96 kHz or more. (keep in mind the ADC is sampling MUCH faster than this because of sigma-delta modulation).
What do you call a general purpose ADC?
General Purpose ADC – These are the general run of the mill ADCs that you would use for your load cell, temperature sensor, whatever. They come single ended and differential, all sorts of Audio ADC – There are two things that can make audio ADCs special.
What is an ADC and what does it do?
An ADC is an electronic system or a module that has an Analog Input (VIN), Reference Voltage Input (V REF) and Digital Outputs. The ADC converts the analog input signal to a digital output value that represents the magnitude or value of the analog input in comparison with the reference voltage.
How is a comparator used in an ADC?
These ADCs use a comparator to compare input voltage and the output of an internal digital-to-analog converter, successively judging whether the input is above or below a narrowing range’s midpoint. For example, a 5V input signal is above the midpoint of a 0 – 8V range (midpoint is 4V).
What should be the accuracy of an ADC?
A general-purpose ADC is expected to work reasonably well capturing any kind of frequency content from DC up to its bandwidth limit; the accuracy at recording any particular frequency content should be unaffected by the presence of other frequency content.