1 Features

• Supports DisplayPort 2.1 up to 20Gbps - RBR,

HBRx, UHBRx

• Protocol agnostic linear equalizer supporting most

AC coupled interfaces up to 20Gbps

• Excellent electrical performance at 20Gbps (10

GHz Nyquist):

– 19 dB equalization

– 1.8 V DC linearity, 1.08 V AC linearity

– -15 / -16 dB Rx / Tx return loss

– -60 dB NEXT, -43 dB FEXT cross talk

– 70 fs low additive RJ with PRBS data

• Transparent to DisplayPort 1.4 and 2.1 link training

• Single 3.3 V supply with low active power: 160

mW / channel

• Internal voltage regulator provides immunity to

supply noise

• High linearity easing DP compliance ratio tests

• High channel BW resulting excellent linear EQ

curves

• Pin-strap, I2C or EEPROM programming

– 18 EQ boost settings

– 5 flat gain settings

• TDP2004: 0 to 70 °C commercial temperature

• TDP2004I: –40 to 85 °C industrial temperature

• 4 mm × 6 mm, 40 pin WQFN package

2 Applications

• Desktop PC or motherboard

• PC, notebooks, and tablets

• Docking stations

• TV, gaming, home theater, and entertainment

• Pro audio, video, and signage

• Test and measurement

• Medical

• Flat panel monitors

3 Description

The TDP2004 is a four-channel low-power highperformance

linear repeater or redriver designed to

support DisplayPort 2.1 up to 20Gbps.

The TDP2004 receivers deploy continuous time

linear equalizers (CTLE) to provide a programmable

high-frequency boost. The equalizer can open an

input eye that is completely closed due to intersymbol

interference (ISI) induced by an interconnect

medium, such as PCB traces. The CTLE receiver

is followed by a linear output driver. The linear

data-paths of TDP2004 preserve transmit preset

signal characteristics. High bandwidth, low channelto-

channel cross-talk, low additive jitter and excellent

return loss makes the device almost a passive

element in the link, but with its useful equalization.

The DisplayPort link training is effective through the

linear redriver that becomes part of the passive

channel in between source Tx and sink Rx. This

transparency in the link training protocol results in

best electrical link and lowest possible latency. The

data-path of the device uses an internally regulated

power rail that provides high immunity to any supply

noise on the board.

The device also has low AC and DC gain variation

providing consistent equalization in high volume

platform deployment.