Figure 3-14. Connection Diagram For A 2-Wire Rtd Using A High-Side R - Texas Instruments ADS1x48EVM User Manual

ADS1x48EVM Overview
3.5.3.2 Connecting a 2-Wire RTD Using a High-Side R
Figure 3-14 shows how to connect a 2-wire RTD using a high-side R

Figure 3-14. Connection Diagram for a 2-Wire RTD Using a High-Side R

Figure 3-14 also shows that for this RTD configuration, the RTD is connected to REFN1 and RTD_B.
Additionally, jumpers JP4, JP5, and JP6 are connected whereas jumper JP3 is disconnected. Finally, the AIN1
pin on the ADS1x48 is configured to be a current source and the measurement is taken between AIN0 and AIN3.
Table 3-5 summarizes the necessary connections and ADC configuration settings.
20 ADS1x48EVM Evaluation Module
to J6 on the ADS1x48EVM
REF
JP6
REFP1
REFN1
JP3
RTD_A
RTD_B
JP4
RTD_C
JP5
Copyright © 2022 Texas Instruments Incorporated
configuration to J6.
REF
IDA C
AIN1
REFP1
REFN1
AIN0
IEXC2 IEXC2
AIN2
AIN3
IEXC1
SBAU378A – SEPTEMBER 2021 – REVISED JANUARY 2022
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REF
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