Topic: Electronics Engineering
A 5 bit DAC has a current output. For a digital input of 10100, an output current of 10 mA is produced. What will be the output current for a digital input of 11101?
- A. 14.5 mA
- B. 10 mA
- C. 100 mA
- D. Not possible to calculate
Answer: A. 14.5 mA
Explanation: output = Resolution × D
(Here D = decimal equivalent of given binary value).
For 10100 (which is 20 in decimal), output is 10 mA. So, Resolution = $10~mA / 20 = 0.5~mA$.
For 11101 (which is 29 in decimal), output = $0.5~mA \times 29 = 14.5~mA$.