SBOS893C August 2018 – July 2019 INA821
Figure 69 shows a three-pin programmable-logic controller (PLC) design for the INA821. This PLC reference design accepts inputs of ±10 V or ±20 mA. The output is a single-ended voltage of 2.5 V ±2.3 V (or 200 mV to 4.8 V). Typically, PLCs have these input and output ranges.