TIDUDI9A January   2018  – May 2025 ISOM8610

 

  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 Highlighted Products
      1. 2.2.1 ISO121x
      2. 2.2.2 SN74LV165A
      3. 2.2.3 SN74LVC1GU04
      4. 2.2.4 TVS3300
      5. 2.2.5 ISOM8600
    3. 2.3 System Design Theory
      1. 2.3.1 Digital Input Stage
      2. 2.3.2 Broken Wire Detection
        1. 2.3.2.1 Case 1: Wire Intact and Input State '1'
        2. 2.3.2.2 Case 2: Wire Intact and Input State '0'
        3. 2.3.2.3 Case 3: Broken Wire
      3. 2.3.3 Readout of Digital Outputs
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Software
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
      2. 3.2.2 Test Results
        1. 3.2.2.1 Group-Channel Configuration
        2. 3.2.2.2 Single-Channel Configuration
      3. 3.2.3 Conclusion
  10. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  11. 5Software Files
  12. 6Related Documentation
    1. 6.1 Trademarks
  13. 7About the Author
    1. 7.1 Acknowledgments
  14. 8Revision History

1.1 Key System Specifications

Table 1-1 Key System Specifications
PARAMETER SPECIFICATIONS DETAILS
Number of channels 16 (in groups of 8) Section 2.3.1
Supply voltage 3.3 V (provided by LaunchPad) Section 3.1
Maximum sampling speed, serial 100 kHz (200 kbps) / channel Section 2.3.1
Maximum sampling speed, parallel 2 MHz (4 Mbps) / channel Section 2.2.1
time needed for broken wire detection, single channel configuration 3 ms (100-kΩ pullup to a 24-V supply) Section 3.2.2.2
minimum supply voltage for broken wire detection to work 14.9 V (100-kΩ pullup, single-channel configuration) Section 3.2.2.2
time needed for broken wire detection, group configuration (eight channels) 24 ms (800-kΩ pullup to a 24-V supply per channel) Section 3.2.2.1
Additionally needed parts for broken wire detection, single channel configuration 1 optical switch Section 2.3.2