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

1.1 Kit Contents

The THVD24X2VEVM is ready to operate directly out-of-box with a THVD2452VDR transceiver in a D package installed at site U1 on the board. In addition to the preinstalled THVD2452VDR, the following tables describe each pad on the THVD24X2VEVM board and which components are already installed by default.

Table 1-1 describes the jumpers (J1 through J20) that are preinstalled on the THVD24X2VEVM board and the function of the jumper for operating the EVM.

Table 1-1 Jumper Pads on the THVD24X2VEVM Board
Jumper Name Function Package Comment
J1 VIO supply input 3 pin terminal block N/A
J2 VCC supply input 3 pin terminal block N/A
J3 RX common-mode input 4-pin header N/A
J4 RX “B” pin common-mode input 4-pin header N/A
J5 RX “A” pin common-mode input 4-pin header N/A
J6 R pin output 8-pin header N/A
J7 Shunt to short VCC = VIO 2-pin header Shunt J7 for single supply application
J8 Common-mode + RX bus connection point 4-pin header N/A
J9 Input header A/B pins 4-pin header N/A
J10 RX bus external connection terminal 3-pin terminal block N/A
J11 “/RE” pin input 8-pin header N/A
J12 “DE” pin input 8-pin header N/A
J13 TX bus external connection terminal 3-pin terminal block N/A
J14 Common-mode + TX bus connection point 4-pin header N/A
J15 Output header Y/Z pins 4-pin header N/A
J16 “D” pin input 8-pin header N/A
J17 TX common-mode input 4-pin header N/A
J18 TX “Y” pin common-mode input 4-pin header N/A

J19

TX “Z” pin common-mode input

4-pin header

N/A
J20 SLR control input 8-pin header Can be shunted to VIO or GND using J20

Table 1-2 describes the pads on the THVD24X2VEVM board where resistors are installed by default and pads where additional resistors can be added.

Table 1-2 Resistor Pads on the THVD24X2VEVM Board
Pad Name Function Package Comment Installed?
R1 0-Ω resistor 0603 Connection between J6 and "R" pin on U1 Yes
R2 Pullup resistor pad 0603 Ability to pull up "R" pin output No
R3 Current limiting resistor for LED 0603 Limits current on "R" pin LED (D1) Yes
R4 0-Ω resistor 0603 Connection between J11 and “/RE” pin of U1 Yes
R5 Pulldown resistor pad 0603 Ability to pull down “/RE” pin output No
R6 Pullup Resistor Pad 0603 Ability to pull up “/RE” pin output No
R7 0-Ω resistor 0603 Connection between J12 and “DE” pin for U1 Yes
R8 Pullup resistor pad 0603 Ability to pull up “DE” pin output No

R9

Pulldown resistor pad

0603

Ability to pull down “DE” pin output

No
R10 0-Ω resistor 0603 Connection between J16 and “D” pin of U1 Yes
R11 Pullup resistor pad 0603 Ability to pull up “D” pin output No
R12 Pulldown resistor pad 0603 Ability to pull down “D” pin output No
R13 Current limiting resistor for LED 0603 Limits current on “D” pin LED (D2) Yes

R14

Current limiting resistor for LED

0603

Limits current on “VCC” pin LED (D3)

Yes
R15 GND to EARTH resistor pad 0603 Located on VIO Supply (J1) No
R16 GND to EARTH resistor pad 0603 Located on VCC Supply (J2) No
R17 Common-mode loading resistor 0603 “A” Pin common-mode loading resistor; minimum value is 375 Ω Yes
R18 0-Ω resistor 0603 “A” Pin bus connection resistor to output terminal Yes
R19 A-B termination resistor pad 0805 120-Ω nominal resistance recommended if added No
R20 0-Ω resistor 0603 “B” Pin bus connection resistor to output terminal Yes
R21 Common-mode loading resistor 0603 “B” Pin common-mode loading resistor; minimum value is 375 Ω No
R22 Common-mode loading resistor 0603 “Z” Pin common-mode loading resistor; minimum value is 375 Ω No
R23 0-Ω resistor 0603 “Z” Pin Bus Connection Resistor to Output Terminal Yes
R24 Y-Z termination resistor pad 0805 120-Ω nominal resistance recommended if added No
R25 0-Ω resistor 0603 “Y” Pin Bus Connection Resistor to Output Terminal Yes
R26 Common-mode loading resistor 0603 “Y” Pin common-mode loading resistor; minimum value is 375 Ω No

Table 1-3 describes the pads on the THVD24X2VEVM board where capacitors are installed by default and where additional capacitors can be added.

Table 1-3 Capacitor Pads on the THVD24X2VEVM Board
Pad Name Function Package Comment Installed?
C1 Load capacitance for “R” 0603 N/A No
C2 47-µF, 10-V decoupling capacitor 0805 From VIO to GND on VIO supply No
C3 10-µF, 6.3-V decoupling capacitor 0805 From VIO to GND on VIO supply Yes
C4 47-µF, 10-V decoupling capacitor 0805 From VCC to GND on VCC supply No
C5 10-µF, 6.3-V decoupling capacitor 0805 From VCC to GND on VCC supply Yes
C6 100-nF, 25-V decoupling capacitor 0805 “B” line common-mode decoupling capacitor Yes
C7 100-nF, 25-V decoupling capacitor 0805 “A” line common-mode decoupling capacitor Yes
C8 47-µF, 10-V decoupling capacitor 0805 From GND to EARTH on VIO supply No
C9 10-µF, 6.3-V decoupling capacitor 0805 From GND to EARTH on VIO supply Yes
C10 47-µF, 10-V decoupling capacitor 0805 From GND to EARTH on VCC supply No
C11 10-µF, 6.3-V decoupling capacitor 0805 From GND to EARTH on VCC supply Yes
C12 Termination capacitance pad 0805 A to B capacitor pad to test different capacitive loading conditions No
C13 100-nF, 6.3-V decoupling capacitor 0603 U1 VCC decoupling capacitor Yes
C14 100-nF, 6.3-V decoupling capacitor 0603 U1 VIO decoupling capacitor Yes
C15 Termination capacitance pad 0805 Y to Z capacitor pad to test different capacitive loading conditions No
C16 100-nF, 25-V decoupling capacitor 0805 “Y” line common-mode decoupling capacitor Yes
C17 100-nF, 25-V decoupling capacitor 0805 “Z” line common-mode decoupling capacitor Yes

The THVD24X2VEVM has three LEDs preinstalled on pads D1, D2, and D3. These LEDs are in a non-standard package. Table 1-4 provides the location and the function of each LED.

Table 1-4 LED Pads on the THVD24X2VEVM Board
Pad Name Function
D1 “R” line LED (Red)
D2 “D” line LED (Green)
D3 “VCC” LED (Blue)

Table 1-5 provides information about the device preinstalled on the EVM.

Table 1-5 Included IC for the THVD24X2VEVM
IC ID Function Package Comment Installed?
U1 THVD24X2VDR Footprint D Preinstalled with THVD2452VDR Yes

The default setup of the THVD24X2VEVM is optimized for working with the THVD2452VDRC, operating in a single supply mode without a common-mode voltage. By shorting the headers at site J7 (VIO = VCC) and attaching a valid power supply to VCC, the board is placed in the default state and is ready to operate.