应用笔记 4390

Drive the REF Pin of New Generation Instrumentation and Current-Sense Amplifiers Without an Op Amp


摘要 : This application note discusses the REF pin functionality in the indirect current-feedback architecture for instrumentation amplifiers. This article compares the importance of a REF buffer in a three-op amp architecture and differential amplifiers with the indirect current-feedback architecture. The MAX4208, MAX4209 and MAX9922/MAX9923 amplifiers serve as examples of the technique.