(ii) Resolution (For $R_f=R$ )



8 -bit DAC: $2^8=256$ steps

Change for LSB:

$$

\Delta V_A=-V_R \frac{1}{2^{\natural}}=-5 \mathrm{~V} \times \frac{1}{256}=-0.01953 \mathrm{~V}

$$



Resolution is $\left|\Delta V_A\right|=19.53 \mathrm{mV}$ per LSB