1 Introduction

In industrial environments where many systems are operating, it is important to monitor the state of the systems. A common solution is to use Programmable Logic Controllers (PLC). They capture data from the system, which is checked by a program logic and then outputs the appropriate response. To do so, PLCs function with analog I/O modules. Analog Input Modules (AIM) send analog readings to the PLC containing an Analog Output Module (AOM), which performs an action based on those readings. This system includes two ADCs to read the sensor signals in current and voltage modes. These signals have to be accurate and retain the integrity to read the precise state of the device being monitored. Instead of having two ADCs (one for each mode), the TMUX4821 can be implemented. This results in the need for only one ADC to read in both modes. This reduces the BOM count and still maintains precise signal integrity, due to the TMUX4821s very low R_on profile.