TIDUF19 September   2022 ADS1282-SP

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Rset, Rref, and Gain Calculation
      2. 2.2.2 Analog Multiplexer Effect
    3. 2.3 Highlighted Products
      1. 2.3.1 ADS1282-SP
      2. 2.3.2 LMP7704-SP
      3. 2.3.3 TPS7A4501-SP
      4.      16
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software Requirements
    3. 3.3 Test Setup
    4. 3.4 Test Results
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  10. 5About the Author

3.4 Test Results

Figure 3-5 to Figure 3-7 illustrates the RTD resistance measurement percent error. Through out all three sets of collected data, the common mode voltage (Vcm) have a small effect on the result. All captured data shown in Figure 3-7 have percent error less than 0.07% error. Therefore, it is recommended to bias the RTD current at around 1.5 mA for the best performance.

Figure 3-5 Temperature Measurement Accuracy with IRTD = 0.5 mA
Figure 3-6 Temperature Measurement Accuracy with IRTD = 1 mA
Figure 3-7 Temperature Measurement Accuracy with IRTD = 1.5 mA