Current Sensing on a Negative Voltage Supply Rail, using a Precision Instrumentation Amplifier

By: Akshay Bhat

Abstract: Applications like ISDN and telecom systems need a negative voltage, current-sense amplifier. This application note describes one method for designing a negative-rail, current-sense amplifier. The design is quite flexible and can be easily changed for monitoring different negative rails. The MAX4460 single-supply instrumentation amplifier is used to demonstrate the design.