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

4.1.3 Hardware Connection

WARNING:

TI intends this reference design to be operated in a lab environment only and does not consider the reference design to be a finished product for general consumer use.

TI Intends this reference design to be used only by qualified engineers and technicians familiar with risks associated with handling high-voltage electrical and mechanical components, systems, and subsystems.

High voltage! There are accessible high voltages present on the board. The board operates at voltages and currents that can cause shock, fire, or injury if not properly handled or applied. Use the equipment with necessary caution and appropriate safeguards to avoid injuring yourself or damaging property.

Hot surface! Contact can cause burns. Do not touch! Some components can reach high temperatures > 55°C when the board is powered on. The user must not touch the board at any point during operation or immediately after operating, as high temperatures can be present.

CAUTION: No protection circuit such as Transient Voltage Suppressor (TVS) or reverse protection exists for the interface or internal circuits. Any electrostatic discharge can damage the board. Incorrect or reverse power supplies connected to board can also damage the board.

TIDA-010962 reference design board does not support hot plugging at any time. When connecting or disconnecting the C2000 control card to or from the base board, follow this sequence: first power off both LV and HV supplies, then disconnect the USB cable from the PC.

Set the board to Out Off status before changing the DUT value or type during evaluation testing.

TIDA-010962 TIDA-010962 PCB Board Function AreaFigure 4-2 TIDA-010962 PCB Board Function Area

Figure 4-2 shows the top view of the reference design hardware. Jumpers J10, J11, and J13 are ±12V and +5V power connection jumpers that are installed after manufacturing. Do not remove these jumpers. There is a heat sink pasted on the output stage before delivery. Upon receipt of the board, verify that the heat sink is still properly attached.

The yellow area is the LV power rail that provides ±12V, +5V, and 3.3V for the signal chain. The blue area is the HV power area, which includes the power output stage and voltage and current sensing circuits. The red area is the LV signal chain, which includes ADC, DAC, closed-loop, and clamp circuits.

The J17 connector is the C2000 control card socket. The LV+ and GNDB pins of this connector are for the LV +15V power supply. The +HV, GNDA, and –HV pins are for the HV +43V, –42V or +83V, –2V power supply. The Vout pin and the adjacent GNDA pin are for connecting the DUT. J7 is the socket for plugging in the fan.

Figure 4-3 shows the finished cable connection.

TIDA-010962 Test SetupFigure 4-3 Test Setup

Cable and power connection sequence:

  1. Verify the heat sink is properly attached in the correct position
  2. Insert the TMDSCNCD280039C control card into the J17 slot and connect the USB Type-C® port of the USB cable to the control card. Do not connect the Type-A port of the USB cable to the PC at this step.
  3. Connect a fan to J7 to provide board heat dissipation
  4. Connect the LV power supply: +15V to LV+ and LV GND to GNDB. Do not power up at this step.
  5. Connect the HV power supply: +43V to HV+, HV GND to GNDA, and –42V to HV– (+83V, –2V connection follows the same pattern). Do not power up at this step.
  6. Connect the DUT: Vout is the output and GNDA is ground (resistor or capacitor)
  7. If evaluating the Gang function, connect two-wire cables to Gang+ and Gang– of each board. Each board must have isolated LV and HV power supplies.
  8. Connect an oscilloscope or 6½-digit digital multimeter to the DUT for measurement
    Note: For easier evaluation, the control loop feedback connection point is located before the output switch. To accurately measure the output voltage, there are two options: measure the Vout test point before the output switch, or implement remote feedback from the DUT by connecting the remote sensing connector (J3) to the DUT (not supported in the current BOM).
  9. Power up the board
    1. Power on LV (+15V)
    2. Power on the HV supply (+43V, –42V or +83V, –2V). If the HV power supplies are separate, power on the positive HV supply first, then the negative HV supply.
  10. Connect the Type-A port of the USB cable to the PC after the LED blinks on the board
  11. Open FVI80GUI.exe on the PC to start testing
  12. After completing evaluation, power off the HV supply first, then power off the LV supply, and finally disconnect the USB cable from the PC.
Note: If the GUI tool is opened before connecting the USB cable, the GUI does not detect the communication port.
CAUTION:

Before removing the C2000 control card from the base board, turn off the power and disconnect the USB cable first, or the board sustains damage.