SBAU206B april 2015 – may 2023 ADS1262 , ADS1263
Connect a 2-wire RTD to any of the following differential pairs on terminal block J3: AIN0 and AIN1, AIN2 and AIN3, or AIN6 and AIN7. Figure 3-7 shows an example where the 2-wire RTD is connected to differential pair AIN6 and AIN7.
In this configuration, connect external jumper wires between AIN4 (J3:5) and AIN6 (J3:7) as well as AIN7 (J3:8) to AINCOM (J5:1). These jumper wires route the IDAC current on AINCOM around the input filtering to prevent voltage drops in the input signal path. IDAC current flows across the RTD and then through R1. The ratiometric reference voltage is generated between AIN4 and AIN5. The IDAC current is then routed to GND through resistor R2 when populated.