The INA183 does not have a dedicated power-supply. Instead, an internal connection to the IN+ pin serves as the power supply for this device. This allows the device to be used in applications where lower voltage or sub-regulated supply rails are not present. The operational voltage range on this pin is 2.7 V to 26 V and is designed for power-supply applications. The maximum current drawn from the IN+ pin is 130 μA, when the current sense voltage is zero.