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

2.2 Design Considerations

As Figure 2-2 illustrates, TIDA-060042 is designed to connect to ADS1282EVM-PDK to monitor voltage across RTD1 and RTD10. TIDA-060042 can measure the RTD voltages in two different ways: with or without buffers. Buffers are provided as an option but the main focus in this reference design is to evaluate ADS1282-SP without using any buffers. The following sections describe the formulas to calculate Rset, Rref, and the internal ADC gain, as well as simulations showing the effect of analog multiplexer connecting between TIDA-060042 and ADS1282EVM-PDK.