How many clock cycles when input is $V_{i n}$ and $-V_{r e f}$ ?

- For $V_{\text {in }}: N_{\text {deint }}=\left(V_{\text {in }} / V_{\text {ref }}\right) \cdot N_{\text {int }}$

- For $-V_{\text {ref }}$ (i.e., $V_{\text {in }}=-V_{\text {ref }}$ ): $N_{\text {deint }}=\left(-V_{\text {ref }} / V_{\text {ref }}\right) \cdot N_{\text {int }}=-N_{\text {int }}$ (negative, which is non-physical; typically, the range is 0 to $V_{r e f}$ )