Texas Instruments’ DRV5056 ratiometric unipolar Hall effect sensors can be used for highly accurate position sensing in a wide range of applications. They respond proportionally to the flux density of a magnetic south pole and operate from a 3.3V to 5V power supply. A unipolar magnetic response feature drives analog output of 0.6V when no magnetic field is present and increases when a south magnetic pole is applied. The output swing is further maximized with four magnetic sensitivity options of 200mV/mT, 20mT range; 100mV/mT, 39mT range; 50mV/mT, 79mT range; and 25mV/mT, 158mT range. Two package options are available, the surface mount SOT-23 and the through hole TO-92, offering different sensing directions. These devices’ ratiometric architecture minimizes errors from VCC tolerance when the external analog-to-digital converter (ADC) uses the same VCC for its reference.