Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Video editing Video EQ TQFP 48 EP (7x7)

General Description

The MAX3815 cable equalizer automatically provides

compensation for DVI™, HDMI™, DFP, PanelLink

, and

ADC cables. It extends the usable cable distance up to

36 meters. The MAX3815 is designed to equalize sig-

nals encoded in the transition-minimized differential

signaling (TMDS

) format.

The MAX3815 features four CML-differential inputs and

outputs (three data and one clock). It provides a loss-

of-signal (LOS) output that indicates loss-of-clock sig-

nal. The outputs include a disable function or the

equalizer can be powered down to conserve power.

For direct chip-to-chip communication, the output dri-

vers can be switched to one-half the DVI output specifi-

cation to conserve power and reduce EMI. Equalization

can be automatic or set to manual control for specific

in-cable applications.

The MAX3815 is available in a 7mm x 7mm, 48-pin

TQFP-EP package and operates over a 0°C to +70°C

temperature range.

Applications

Front-Projector DVI/HDMI Inputs

High-Definition Televisions and Displays

DVI-D/HDMI Cable-Extender Modules and Active

Cable Assemblies

LCD Computer Monitors

Features

♦ Extends TMDS Cable Reach to Projectors or

Monitors Using DVI, DFP, PanelLink, ADC, or

HDMI Interfaces

♦ Extends TMDS Interface Length as Follows:

0 to 50 Meters Over DVI-Cable, 24 AWG STP

(Shielded-Twisted Pair)

0 to 36 Meters Over DVI-Cable, 28 AWG STP

0 to 30 Meters Over DVI-Cable, 30 AWG STP

♦ Compatible with DTV Resolutions 480i, 480p,

720p, 1080i, and 1080p

♦ Compatible with Computer Resolutions VGA,

SVGA, XGA, SXGA, UXGA

♦ Fully Automatic Equalization Up to 40dB at

825MHz (1.65Gbps), No System Control Required

♦ 3.3V Power Supply

♦ Power Dissipation of 0.6W (typ)

♦ 7mm x 7mm 48-Pin TQFP Lead-Free Package

MAX3815

TMDS Digital Video Equalizer for DVI/HDMI

Cables

________________________________________________________________

Maxim Integrated Products

Ordering Information

RGB/HV

ADC/SYNC

TMDS

DESERIALIZER

SELECT

IMAGE

SCALER AND

PROCESSOR

PANEL

INTERFACE

TIMING AND

DRIVERS

LCD,

DLP,

LCOS

VGA INPUT

DVI-D INPUT

DVI-D CABLE UP

TO 36m OR 120ft

(28AWG STP)

LAPTOP

VIDEO PROJECTOR

MAX3815

EQUALIZER

Typical Application Circuits

19-3466; Rev 2; 2/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

PART

TEMP

RANGE

PIN-

PACKAGE

PKG

CODE

MAX3815CCM 0°C to +70°C 48 TQFP-EP*

C48E-8

MAX3815CCM+ 0°C to +70°C 48 TQFP-EP* C48E-8

Denotes lead-free package.

*EP = Exposed pad.

Typical Application Circuits continued at end of data sheet.

Pin Configuration appears at end of data sheet.

DVI is a trademark of Digital Display Working Group.

HDMI is a trademark of HDMI Licensing, LLC.

PanelLink and TMDS are registered trademarks of Silicon Image, Inc.

Summary of content (11 pages)

PAGE 1
9-3466; Rev 2; 2/08 KIT ATION EVALU E L B AVAILA TMDS Digital Video Equalizer for DVI/HDMI Cables The MAX3815 cable equalizer automatically provides compensation for DVI™, HDMI™, DFP, PanelLink®, and ADC cables. It extends the usable cable distance up to 36 meters. The MAX3815 is designed to equalize signals encoded in the transition-minimized differential signaling (TMDS®) format. The MAX3815 features four CML-differential inputs and outputs (three data and one clock).
PAGE 2
MAX3815 TMDS Digital Video Equalizer for DVI/HDMI Cables ABSOLUTE MAXIMUM RATINGS Supply Voltage VCC ..............................................-0.5V to +4.0V Voltage at All I/O Pins.................................-0.5V to (VCC + 0.7V) Voltage between any CML I/O Complementary Pair ..........±3.3V Continuous Power Dissipation (TA = +70°C) 48-Pin TQFP-EP (derate 36.2mW/°C above +70°C) ..2896mW Operating Junction Temperature Range ...........-55°C to +150°C Storage Temperature Range ....................
PAGE 3
TMDS Digital Video Equalizer for DVI/HDMI Cables (VCC = +3.0V to +3.6V, TA = 0°C to +70°C. Typical Values are at VCC = +3.3V, external terminations = 50Ω ±1%, TMDS rate = 250Mbps to 1.65Gbps, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS Common-Mode Output Voltage 50Ω load, each side to VCC, OUTLEVEL = HIGH Rise/Fall Time (Note 1) 20% to 80% MIN TYP MAX VCC 0.
PAGE 4
Typical Operating Characteristics (continued) (Typical values are at VCC = +3.3V, TA = +25°C, data pattern = 27 - 1 PRBS + 20 ones + 27 - 1 PRBS (inverted) + 20 zeros, unless otherwise noted.) EQUALIZER INPUT EYE AFTER 205ft OF GORE 89 CABLE (TOP) EQUALIZER OUTPUT (BOTTOM) EQUALIZER INPUT EYE AFTER 205ft OF GORE 89 CABLE (TOP) EQUALIZER OUTPUT (BOTTOM) MAX3815 toc04 EQUALIZER EYES AFTER 100ft MADISON DIGITAL FLAT-PANEL CABLE, 28 AWG (DATA RATE = 1.
PAGE 5
TMDS Digital Video Equalizer for DVI/HDMI Cables -0.2 -0.3 -0.4 180 160 140 120 EQCONTROL VOLTAGE -0.5 100 -0.6 80 60 -0.7 RESIDUAL JITTER AT 1.65Gbps -0.8 -0.9 -1.0 0 20 40 60 80 CABLE IS TENSOLITE TWIN-AX 28 AWG 100 RESIDUAL JITTER (psP-P) EQCONTROL VOLTAGE (V) -0.1 200 200mV/div 40 20 0 120 350 MAX3815 toc15 CABLE IS TENSOLITE TWIN-AX 28 AWG WITH APPROXIMATELY 0.
PAGE 6
TMDS Digital Video Equalizer for DVI/HDMI Cables MAX3815 Pin Description (continued) PIN NAME 20, 23, 24, 25, 28, 29, 32, 33, 36, 37, 42 GND FUNCTION Ground 21 RXC_OUT- 22 RXC_OUT+ Negative Clock Output, CML Positive Clock Output, CML 26 RX2_OUT+ Positive Data Output, CML 27 RX2_OUT- Negative Data Output, CML 30 RX1_OUT+ Positive Data Output, CML 31 RX1_OUT- Negative Data Output, CML 34 RX0_OUT+ Positive Data Output, CML 35 RX0_OUT- Negative Data Output, CML 39 OUTLEVEL Outpu
PAGE 7
TMDS Digital Video Equalizer for DVI/HDMI Cables RX1_IN+/- RX0_IN+/- TERMINATED 3.3V CML TERMINATED 3.3V CML TERMINATED 3.3V CML INPUT BUFFER ADAPTIVE EQ LIMITING AMPLIFIER DRIVER RX2_OUT+/- INPUT BUFFER ADAPTIVE EQ LIMITING AMPLIFIER DRIVER RX1_OUT+/- INPUT BUFFER ADAPTIVE EQ LIMITING AMPLIFIER DRIVER RX0_OUT+/- MAX3815 RX2_IN+/- EQCONTROL RXC_IN+/- TERMINATED 3.
PAGE 8
MAX3815 TMDS Digital Video Equalizer for DVI/HDMI Cables A squelching function can be created by sending the CLKLOS output through an inverter to the OUTON pin. This will squelch the CML outputs whenever the clock signal is removed. A loss-of-signal LED indicator can be incorporated into the circuit as well (see Figure 3).
PAGE 9
TMDS Digital Video Equalizer for DVI/HDMI Cables TYPICAL MAX3815 CABLE REACH 60 CABLE LENGTH (meters) 50 15 X38 NGE MA H RA Gbps = EA GT .65 AR EN O 1 ED BLE L UP T D A SH LE CA ATES IR AB US LL DV A T A 40 30 20 10 AT NGTH WITHOUT EQ LIMIT OF CABLE LE 1.65Gbps • An uninterrupted ground plane should be positioned beneath the high-speed I/Os. • Ground-path vias should be placed close to the IC and the input/output interfaces to allow a return current path to the IC and the DVI cable.
PAGE 10
TMDS Digital Video Equalizer for DVI/HDMI Cables MAX3815 Typical Application Circuits (continued) DVI-D OR HDMI EXTENDER BOX UP TO 36m OF DVI-D OR HDMI CABLE (28 AWG) STANDARD LENGTH DVI-D OR HDMI CABLE MAX3816 DDC EXTENDER HDTV MAX3815 EQUALIZER VIDEO SOURCE DIGITAL BROADCAST DIGITAL CABLE DIGITAL SATELLITE DVD Blu-ray Disc™ Blu-ray Disc IS A TRADEMARK OF Blu-ray DISC ASSOCIATION. GND VCC OUTLEVEL VCC GND VCC VCC N.C. N.C. N.C. N.C.
PAGE 11
TMDS Digital Video Equalizer for DVI/HDMI Cables REVISION NUMBER REVISION DATE 0 10/04 1 2 DESCRIPTION PAGES CHANGED Initial release. — 8/05 Removed future status from the lead-free package in the Ordering Information table. 1 2/08 Removed reference to the schematic and board layers in the Layout Considerations section. 9 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.