TIDUFH2 March   2026

 

  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
      1. 2.2.1 Loop Bandwidth
      2. 2.2.2 Fast Setting and Sampling
      3. 2.2.3 Low Temperature Drift and Long-Term Drift
      4. 2.2.4 Output Capacity
      5. 2.2.5 Linearity
      6. 2.2.6 Current Leakage
      7. 2.2.7 Reduce Noise
      8. 2.2.8 Reduce Glitch When Switching Current Range
      9. 2.2.9 Heat Design
        1. 2.2.9.1 OPA593
        2. 2.2.9.2 OPA593 Divider Resistor and Series Resistor
        3. 2.2.9.3 Current Sensing Resistor and Feedback Voltage Divider
        4. 2.2.9.4 Clamp Resistor
    3. 2.3 Highlighted Products
      1. 2.3.1  REF54
      2. 2.3.2  DAC11001B
      3. 2.3.3  DAC80502
      4. 2.3.4  ADS9317
      5. 2.3.5  OPA593
      6. 2.3.6  OPA596
      7. 2.3.7  PGA849
      8. 2.3.8  OPA454
      9. 2.3.9  OPA4187
      10. 2.3.10 THS4552
      11. 2.3.11 RES11A
  9. 3System Design Theory
    1. 3.1 Force Voltage Mode
    2. 3.2 Force Current Mode
    3. 3.3 Buffer Mode
    4. 3.4 Gang_Master Mode
    5. 3.5 Gang_Slaver Mode
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
      1. 4.1.1 Support Working Mode
      2. 4.1.2 Power Supply
      3. 4.1.3 Hardware Connection
    2. 4.2 Software Requirements
      1. 4.2.1 PC GUI
        1. 4.2.1.1 Control Window
        2. 4.2.1.2 ADC Read Raw Data Window
        3. 4.2.1.3 Calibration Window
    3. 4.3 Test Setup
      1. 4.3.1 Source Mode Connection
      2. 4.3.2 Sink Mode Connection
      3. 4.3.3 Gang Mode Connection
    4. 4.4 Test Results
      1. 4.4.1 Linearity and Accuracy
        1. 4.4.1.1 FV ±40V, 500mA, Comp = 10k+470nF, DUT = 3MΩ
        2. 4.4.1.2 FV, 0V to 80V, 500mA, Comp = 10k+470nF, DUT = 3MΩ
        3. 4.4.1.3 FI, ±40V, 10mA, Comp = 10k + 470nF, DUT = 3MΩ
        4. 4.4.1.4 Buffer, ±40V, 10mA, Comp = 10k + 470nF, DUT = 3MΩ
      2. 4.4.2 Transient
      3. 4.4.3 Capacitance Load
      4. 4.4.4 Glitch
      5. 4.4.5 Settling Time
      6. 4.4.6 ADC Swing LSB
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
      3. 5.1.3 PCB Layout Recommendations
        1. 5.1.3.1 Layout Prints
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author
  13. 7Acknowledgment

4.2.1.1 Control Window

The Port list box allows selection of the serial port that communicates with the C2000 control card. Before selection, check which serial port number represents the correct port. The Device Manager in Microsoft Windows shows this information in Figure 4-5, where the red highlight indicates the communication port with the board.

Note: The GUI detects PC serial ports only at start-up. If the software cannot find the correct serial port, close the GUI and run the application again.
TIDA-010962 PC Device Manager Dialog Figure 4-5 PC Device Manager Dialog

Clicking the Port close button opens the selected serial port. The loop configuration can then be set in the CCCV, V_Range, C_Range and Comp list boxes. Input the force voltage in ForceV with values between –40V to approximately 40V when ±40V range is selected or between 0V to about 80 when 0V to 80V range is selected. When 500mA current range is selected, set the high clamp value in CLH from 500mA to about 0mA and set the low clamp value CLL from –500mA to about 0mA. When 10mA or 10μA current range is selected, set the high clamp value in CLH from 10mA to about 0mA and set the low clamp value CLL from –10mA to about 0mA. After completing configuration, click the Config button or Out Off to download the configuration to the board.

ADCV(V) and ADCC(mA) and V_HEX(CLH) and C_HEX(CLL) display ADC read voltage and current values and raw Hex data. V_HEX(CLH) and C_HEX(CLL) have another function that indicates Clamp status. When the background color becomes red, the corresponding clamp is occurring.