9.2.2.2 Detailed Design Procedure

The application shown in demonstrates how to use a single control input and toggle between gain settings of -1 and +1. If switching between inverting and unity gain is not required, the TMUX1237 can be utilized in the feedback path to select different feedback resistors and provide scalable gain settings for configurable signal conditioning.

The TMUX1237 can be operated without any external components except for the supply decoupling capacitors. The select pin is recommended to have a pull-down or pull-up resistor to ensure the input is in a known state if the control signal becomes disconnected. All inputs to the switch must fall within the recommend operating conditions of the TMUX1237 including signal range and continuous current. For this design with a supply of 2.75 V the signal range can be 0 V to 2.75 V and the max continuous current can be 50 mA.