An apparatus includes a capacitor coupled between a first node responsive to receive an input signal and a second node. The apparatus includes a first circuit coupled to the second node and a third node. The first circuit is selectively operable to separately configure at least one of a low-frequency gain of an equalizer and a pole of the equalizer. The equalizer includes the first circuit and the capacitor. The second node is responsive to receive an equalized version of an AC signal of the input signal in a first mode of the apparatus. The second node is responsive to receive a non-equalized version of the AC signal of the input signal in a second mode of the apparatus. The equalized version of the AC signal of the input signal may be a level-shifted and equalized version of the AC signal in the first mode of the apparatus.