Linear Optocouplers features an infrared LED optically coupled with two photodiodes. One input-side feedback photodiode is used to generate a control signal that provides a servomechanism to the LED drive current, thus compensating for the LED's nonlinear time and temperature characteristics. The. This application note presents isolation amplifier circuit designs useful in industrial test and measurement systems, instrumentation, and communication systems. Mouser offers inventory, pricing, & datasheets for High Linearity Optocouplers. It describes the circuit operation in photoconductive and photovoltaic modes and provides some examples of applications in different industry segments.