Figure 3-19. Connection Diagram For A 4-Wire Rtd Using A Low-Side R - Texas Instruments ADS1x48EVM User Manual

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3.5.3.7 Connecting a 4-Wire RTD Using a Low-Side R
Figure 3-19 shows how to connect a 4-wire RTD using a low-side R

Figure 3-19. Connection Diagram for a 4-Wire RTD Using a Low-Side R

Figure 3-19 also shows that for this RTD configuration, the RTD is connected to REFP1, RTD_A, RTD_B,
and RTD_C. Additionally, jumper JP3 is connected whereas jumpers JP4, JP5, and JP6 are disconnected.
Finally, the IEXC1 current source is enabled and the measurement is taken between AIN3 and AIN2.
summarizes the necessary connections and ADC configuration settings.
SBAU378A – SEPTEMBER 2021 – REVISED JANUARY 2022
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to J6 on the ADS1x48EVM
REF
JP6
REFP1
REFN1
JP3
RTD_A
RTD_B
JP4
RTD_C
JP5
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configuration to J6.
REF
IDA C
AIN1
REFP1
REFN1
AIN0
IEXC2 IEXC2
AIN2
AIN3
IEXC1
ADS1x48EVM Evaluation Module
ADS1x48EVM Overview
REF
Table 3-5
25