APPLICATION NOTE 4495

Current-Sense Amplifier Doubles as a High-Common Mode Instrumentation Amplifier

By: Ahmad Ayar

Abstract: This application note discusses differences between current-sense and instrumentation amplifiers. The article also shows how a standard boost converter (MAX668) and a current-sense amplifier (MAX4080) can form a regulator that derives +5V from -48V, without isolation, and why this matters for the telecom industry.