7 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

7.1 Application Information

The TDP2004-Q1 is a high-speed linear redriver which extends the reach of differential channels impaired

by loss from transmission media like PCBs and cables. The device can be deployed in a variety of different

systems. The following sections outline typical applications and their associated design considerations.

7.2 Typical Applications

The TDP2004-Q1 is a linear redriver that can be used as DisplayPort main link signal conditioner as illustrated in

Figure 7-1.

IVI

Processor

Cable

Display

Scaler

ECU

Display

Figure 7-1. Typical Application

7.2.1 DP2.1 Main Link Signal Conditioning

The TDP2004-Q1 can be used in a video source/sink systems such as ADAS, IVI, RSE among other

applications to boost DisplayPort main link signals to increase the reach of the source and sink channel.

The following sections outline detailed procedures and design requirements for a typical DP 2.1 application.

However, the design recommendations can be used in other use cases.

7.2.1.1 Design Requirements

As with any high-speed design, there are many factors which influence the overall performance. The following

list indicates critical areas for consideration during design.

• Match the length between the P and N traces of the single-end segments of the differential pair.

• Use a uniform trace width and trace spacing for differential pairs.

• Place AC-coupling capacitors near the receiver end of each channel segment to minimize reflections.

• AC-coupling capacitors of 220nF are recommended. Set the maximum body size to 0402 and add a cutout

void on the GND plane below the landing pad of the capacitor to reduce parasitic capacitance to GND.

• Surface mount connector is recommended. For through hole connection, back-drill connector vias and signal

vias to minimize stub length.

• Use ground reference plane vias for a low inductance path for the return current.

7.2.1.2 Detailed Design Procedure

The TDP2004-Q1 provides signal conditioning for four DP main link channels. The device is a linear redriver

which is agnostic to DP link training. The DP link training negotiation between a display source and sink stays

effective through the device. The redriver becomes part of the electrical channel along with passive traces,

cables, and other channel elements, resulting in optimum source and sink parameters for best electrical link.

Figure 7-2 shows a simplified schematic for DisplayPort application using TDP2004-Q1.

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TDP2004-Q1

SNLS787 – SEPTEMBER 2025

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