Both the AD8420 and the AD8237 have input ranges that extend below ground. Furthermore, it has already been shown that the ICF topology allows these amplifiers to fully amplify signals which are at the limits of their input range. In conjunction, these two advantages allow AD8420 and AD8237 to use a single-supply for some circuits that would require a dual supply for other in-amps. Two such circuits are shown here. In a low-side current sensing application, there is parasitic resistance in the ground return path. Because of this resistance, the best accuracy is achieved by sensing the voltage across the shunt differentially. In this configuration, typical in-amps must use a dual supply, lest they be limited by the hexagon plot. The ICF architecture, however, does not have this limitation. Another circuit that benefits from these characteristics is a thermocouple interface. In these circuits, the thermocouple is typically connected to ground, either directly or through a resistor. This circuit benefits from the typically low power of the ICF architecture, which reduces temperature measurement errors due to self-heating. AD8237 and AD8420 are both very low power devices. Cold junction compensation is not shown here, but the best results are achieved if the temperature measurement for the cold junction compensation is taken close to the thermocouple reference junction, which is where the thermocouple is connected to the printed circuit board.