TIDUF45 May   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 ADS127L21
      2. 2.3.2 PGA855
      3. 2.3.3 REF70
  9. 3System Design Theory
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Description
      1. 4.1.1 Board Interface
      2. 4.1.2 Power Supplies
      3. 4.1.3 Clocking Tree
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 DC Accuracy Tests
      2. 4.4.2 Gain and Offset Temperature Drift
      3. 4.4.3 Nonlinearity
      4. 4.4.4 SNR and Noise Performance
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

4.4 Test Results

This section presents sample test results. All the test results are done under the following ADC conditions:

SETTING CONFIGURATION
Speed Mode High Speed
Data Rate 11.72kSPS
Filter Sinc4
OSR 1024
Clock Configuration PHI Clock (24MHz)
Voltage Reference Range High-Reference Range
VCM Output Enabled
Reference Buffer Enabled
Analog Positive Input Buffer Enabled
Analog Negative Input Buffer Enabled
PGA Power ± 15V

The tests were performed with the ADS127L11, using the associated GUI; however, the performance of the performance is very similar to the performance of the ADS127L21. All tests use a single-ended input signal.