Question

An R-2R ladder type DAC is as shown below:

If R = 10 K$\Omega$, with binary input 010, then the output voltage $V_0$ is______V.

• A. 5

Answer 1

The correct option is A 5
$V_0=\frac{V_{ref}}{2^n}[1+\frac{V_{ref}}{R}]\times \text{Decimal equivalvent of binary input}$
$=\frac{5}{8}[1+\frac{3R}{R}]\times 2=\frac{5}{8}\times 4\times 2V_0=5V$