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What are the specifications/characteristics used by the manufacturers to describe a digital to analog converter? Explain each one briefly.
Ans:
D/A converter characteristics are:
(i) Resolution:- It is the smaller possible change in output voltage like a function of percentage of full scale output voltage.
(ii) Linearity:- In a D to A converter equal increments in the numerical importance of the digital circuit the input-output relationship is not linear.
(iii) The accuracy of D to A converter is a measure of the difference in between the expected output voltage and the actual output voltage.
(iv) Settling time:- While the digital input to a D to A Converter changes the analog output voltage does not change certainly. Due to the presence of switches, stray capacitances, active devices and inductances related with passive circuit elements. The transient shows in the output voltages and oscillations may also happen the time needed for the analog output to settle within +-½ LSB of the last value after a change in the digital input is termed as settling time.
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