This paper presents the design, realization and characterization of a new hybrid A/D converter based on a combined incremental and cyclic conversion. The proposed implementation offers a configurable resolution, and permits to share the same hardware for the two conversion principles, leading to a compact circuit with only one active element. Integrated into a 0.18-μm CMOS process technology, the ADC features a DNL of -0.8/+1.6 LSB and an INL of -1.2/+1.8 LSB. It provides a 1 kHz sampling frequency while dissipating 150 μW under 1.65 V of voltage supply.