Question

For an 8- bit DAC with reference voltage $V_R=10V$, the analog output voltage for the digital input 1000 0110 is

• A. 4.75 V
• B. 5.50 V
• C. 5.25 V
• D. 6.50 V

Answer 1

The correct option is C 5.25 V

$\text{Resolution}=\frac{V_R}{2^n}=\frac{10}{2^8}=39.06mV$

$\text{Count value}={\left(10000110\right)}_2={\left(134\right)}_{10}$

$\text{Analog output voltage}=134\times 39.06mV$
$=5.234V$