ISRO Electronics & Communication (ECE) 2008 - Question 17

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Topic: Digital Electronics

The 8 bit DAC produces 1.0 V for a digital input of 00110010. What is the largest output it can produce?

  • A. 5 V
  • B. -5 V
  • C. 5.5 V
  • D. 5.10 V

Answer: D. 5.10 V

Explanation: Output = Resolution $\times$ D\n$D =$ Decimal value\n$1.0 = \text{Resolution} \times 50$\n$\therefore \text{Resolution} = \frac{1}{50}$\n$V_{FS} = \text{Resolution} \times 255$\n$= \frac{1}{50} \times 255 = 5.10~V$

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