APPLICATION NOTE 4559

Resistor Network Sets Gain for Fixed-Gain Differential Amplifier

By: Miles Thompson

Abstract: By adding an external resistor network you can lower the gain of a fixed-gain differential amplifier (like the MAX98300) to the gain level required, but you must account for the loading effects of internal resistors. This note includes equations for calculating these effects, plus a link to a spreadsheet for selecting resistor values needed in the network.