ADC and DAC

Hey geeks, the below is a set of possible ADC/DAC basic questions that can be discussed.

1. What are the factors you consider for the selection of ADC ?

2. What do you mean by Resolution of ADC ?

3. How do you determine the number of bits of ADC is required for you ?

4. Which factor determines the number of iterations in SAR done to approximate the input voltage ?

5. What are the 2 methods of ADC interface ?

6. Can you brief up the steps involved in ADC interface with 8051 or any microprocessor for the EOC based method ?

7. Can you brief up the steps involved in ADC interface with 8051 or any microprocessor for the Interrupt based method ?

8. How do you select the particular channel of a ADC . For example, can you tell for ADC0809 ?

9. When will you make the OE high in case of ADC0809 ?

10. What will happen if SC and EOC are tied together in ADC0809 ?

11. What is sampling rate/frequency ?

12. What is the use of interpolation formula ? Are you aware of any interpolation formula ?

13. What is sample and hold ?

14. Are there any Megasample / Gigasample converters ? Where are they used ?

15. What is aliasing ?

16. What is Nyquist-Shannon theorem ?

17. Is it good to sample at a rate that is higher than that of Nyquist Frequency ?

18. What is quantization error and when does it occur ? What is the unit of measurement of it ?

19. How can dithering improve digitization of slowly varying signal ?

20. Which type of ADC implementation is good or should be chosen, if we need lot of channels ?

Have a great day!