This paper presents an integrated Hall sensor microsystem with continuous gain calibration and a current-mode back-end. The integrated system includes a Hall sensor with internal biasing, a fully differential front-end, a preamplifier chain, a voltage-to-current converter and internal voltage and current references. The main feature of this microsystem is full integration, including the references, which guarantee the gain stability. The whole microsystem is integrated in a 0.35μm CMOS technology. It occupies an area of 11.55mm 2. © 2012 IEEE.