Contents
Which factors affect accuracy of an analog-to-digital converter ADC and how?
Many factors including voltage reference, PCB layout, I/O switching, and analog source impedance and so on can affect the ADC accuracy depending on the application. An analog-to-digital converter, or ADC, is a device or peripheral that converts analog signals into digital signals.
How could you improve the resolution of an analogue to digital converter?
FLEXIBLE ADC: A DITHER AND OVERSAMPLING BASED SOLUTION TO IMPROVE THE PERFORMANCE OF ADC SYSTEMS. A well-known technique that can be used to increase the resolution of ADC digitising systems is based on dithering, oversampling and noise shaping.
How to increase the analog to digital converter accuracy?
To have the maximum ADC conversion precision, it is preferable that the ADC dynamic range matches the maximum amplitude of the signal. Assume that the signal to be converted varies between 0 V to 2.5 V and that VAREF is equal to 3.3 V. The maximum signal value converted by the ADC is 3102 (2.5 V) as shown in Figure 9.
How is an analog multiplier used in an ADC?
There is another way to use the analog multiplier. Instead of connecting the analog multiplier’s external input to the voltage of the load, connect it to the ADC’s external reference voltage. In this design the analog multiplier is not measuring power, but is relating the voltage output of the current-sense amplifier to the ADC’s reference voltage.
How is the digital value of an ADC calculated?
20.2 Basic Operation An ADC samples an analog waveform at uniform time intervals and assigns a digital value to each sample. The digital value appears on the converter’s output in a binary coded format. The value is obtained by dividing the sampled analog input voltage by the reference voltage and them multiplying by the number of digital codes.
Do you need a 12 bit analog to digital converter?
Using a 12-bit-resolution analog-to-digital converter (ADC) does not necessarily mean your system will have 12-bit accuracy. Sometimes, much to the surprise and consternation of engineers, a data-acquisition system will exhibit much lower performance than expected.