The ISL28023 can also be used in 4 to 20mA loop applications. The 4 to 20mA loops are used in industrial applications for process monitoring and control to avoid losses in signal due to voltage drops and noise while carrying signals over long distances. In the example circuit shown here, the ISL97519A is a high efficiency boost regulator used to power the loop. The boost regulator has an additional MOSFET (M1) to provide a higher output voltage than the ISL97519A rating. The 8-bit DAC sets the current level in the 4 to 20mA loop and the primary shunt channel of the ISL28023 monitors the overall loop current. The PNP transistors are configured as a current mirror, where the current emitted from the PNP transistor on the right half of the current mirror powers circuits that can be located remotely. Each circuit can be configured such that it steals current from the 4 to 20mA loop. The stolen current is used to communicate a result from the circuit to the central hub, with the auxiliary shunt port measuring the stolen current.