SLLU368 april   2023

 

  1.   Description
  2.   Features
  3. 1Evaluation Module Overview
    1. 1.1 Kit Contents
  4. 2Operating the EVM
    1. 2.1 Setup
      1. 2.1.1 Single Supply Operation
      2. 2.1.2 Dual Supply Operation
    2. 2.2 Operating the THVD24X2VEVM in Default Setup
    3. 2.3 Operating the THVD24X2VEVM With Modifications
      1. 2.3.1 Single-ended Bus Modification Operational Modes
      2. 2.3.2 Differential Signal Bus Modification Operational Mode
  5. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  6. 4Additional Information
    1. 4.1 Trademarks
  7. 5References

2.1.1 Single Supply Operation

The THVD24X2V family of transceivers in the D (SOIC) package from TI can have an additional logic supply pin, VIO. This pin is used to power the internal digital logic circuits inside of the device. In single supply operation mode, for devices like the THVD2452VDR, the VIO pin can be shorted to VCC by shorting the header pins of J7, so that the digital circuits are properly powered.

Table 2-1 Single Supply Operation Jumper Configurations
Component Name Comment
J7 Shorted for single supply operation
J1 VIO supply: leave open
J2 VCC power terminal

Apply VCC through the J2 terminal to power the EVM. With the board oriented with J6 on the top left, as shown in Figure 2-1, the signals are, from right to left, EARTH, GND, and VCC. The EARTH and GND signal distinction is used to help the end user to determine operational qualities with respect to ground potential differences. Install a resistor on pad R16 for testing methods on reducing ground loop current. Check the data sheet for proper powering considerations as supply recommendations can range from 3.3 V, 5 V, or 3.3 V to 5 V.

Providing power to the EVM is similar to the single supply option described in this section. Jumpers J1 and J2 have the same pin orientation from left to right: EARTH pin, GND pin, and voltage supply pin. Attach the VIO power source to J1 and VCC power source to J2.