MAXIM MAX3814 Technical data

General Description

The MAX3814 TMDS™ EQ/driver IC compensates for
FR-4 and cable losses up to the DVI™/HDMI®transmit
connector and provides a fully compliant DVI/HDMI
TMDS output. The device can also be used in DVI/HDMI
cable applications to extend reach and improve jitter
margin of cable channels at the receive-side connector.

The on-chip TMDS drivers operate at a standard cur­rent level for implementing a typical DVI/HDMI non­back-terminated transmitter, as well as a 50% higher
current mode for using a 200Ω back termination resis­tor (nonmatching) to achieve a 10dB return loss.
Typical DVI/HDMI output drivers contribute to reflection
problems between the connector and a typical high­impedance (open) DVI/HDMI Tx output. The selectable
output current (LEVEL pin) gives the option of partial
back termination (e.g., differentially connected 200Ω) to
mitigate the reflection problem effectively while keeping
common-mode offset to a minimum.

The 4-channel implementation treats all channels identi­cally. To allow board layout flexibility for DVI and HDMI
connectors, which have different channel order, the
clock and data channels can be arbitrarily assigned.

The MAX3814 operates from a 3.3V power supply,
standard for DVI/HDMI applications, and is packaged
in a 5mm x 5mm x 0.1mm, 32-pin TQFP package.

Applications

Laptop PC TMDS Equalizer and Driver

Docking Station TMDS Equalizer and Driver

Cable TMDS Equalizer

Features

♦ Equalizes FR-4 Board Microstrip and Cable HF

Losses Up to 15dB at 825MHz for Operation at

0.25Gbps to 1.65Gbps

♦ Compatible with HDMI 1.3

♦ Less Than 0.2UI

P-P

Residual Jitter at 1.65Gbps for

0 to 15dB Channel Loss at 825MHz

♦ Input Terminations: 50Ω (Each Side to V

CC

) ±10%

♦ Output of Driver is a Fully DVI/HDMI TMDS-

Compatible Cable Driver

♦ Output Amplitude: 1.05V

P-P

Differential

♦ Enable Pin to Select Normal Operation or Power-

Down Mode

♦ LEVEL Pin to Select Output Current for Use With

or Without Back Termination

♦ 32-Pin TQFP for Four Channels; Any Channel Can

Be Either a TMDS Data or Clock Signal

♦ V

CC

= 3.3V; Signal Pins Have Absolute Max

Ratings of 5.5V (for Fault Conditions)

MAX3814

DVI/HDMI TMDS FR-4 and

Cable Equalizer/Driver

________________________________________________________________

Maxim Integrated Products

1

Simplified Functional Diagram

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX3814CHJ+ 0°C to +70°C 32 TQFP

19-0813; Rev 2; 12/10

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.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

TMDS is a trademark of Silicon Image, Inc.
DVI is a trademark of Digital Display Working Group.
HDMI is a registered trademark and registered service mark of HDMI Licensing, LCC.

EVALUATION KIT

AVAILABLE

Pin Configuration appears at end of data sheet.

TERMINATED TO V

IND+/-

INC+/-

INB+/-

INA+/-

MAX3814

CC

EQUALIZER

4

3

2

1

LIMITING

AMPLIFIER

1

4

3

2

OUTPUT LEVEL CONTROL

DRIVER 1

LEVEL

4

3

2

OUTA+/-

ENABLE

OUTD+/-

OUTC+/-

OUTB+/-

MAX3814

DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

SPECIFICATION TABLES

(Typical values measured at VCC= 3.3V, TA= +25°C; external terminations = 50Ω ±1%; min/max values valid over VCC= 3.3V
±0.3V, T

A

= 0°C to +70°C; with external terminations = 50Ω ±1% to voltage = 3.3V ±0.7V. Tested at 1.65Gbps. AC parameters guar-

anteed by design and characterization.)

POWER SUPPLY

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Termination-Supply Voltage Range.......................-0.5V to +4.0V

Signal Voltage Range on Any One Signal Wire ....-0.5V to +4.0V

CML Common-Mode Voltage Range on

Any I/O Pair (sustained) .....................................-0.5V to +5.5V

CML Common-Mode Voltage Range on Any I/O Pair

(sustained, within V

CC

and GND) ...-3.3V to +3.3V, Differential

CML Output Loading (termination)............................0Ω to Open

Operating Ambient Temperature Range ................0°C to +70°C

Storage Ambient Temperature Range...............-40°C to +150°C

ESD Human Body Model, Any Pin .....................................2000V

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

OPERATING CONDITIONS

TMDS EQUALIZER PERFORMANCE

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Operating Ambient Temperature 0 25 70 °C

Data Rate 0.25 1.65 Gbps

Maximum Channel Loss

Source Output Rise/Fall Time

Differentia l Input-Voltage Swing

Maximum Supply Noise
Tolerance

CC

3.0 3.3 3.6 V

At 825MHz, FR-4 microstrip compensate
on curve

20% to 80%, mea sured at source
transmitter (input to channel)

Measured at source transm itter (input to
channel)

DC-5000kHz, all specifications maintained 50 mV

15 dB

240 ps

700 1050 1400 mV

P-P

P-P

PARAMETER CONDITIONS MIN TYP MAX UNITS

DC PARAMETERS

Supply Current 110 140 mA

PARAMETER CONDITIONS MIN TYP MAX UNITS

Residua l Output Jitter (15 x

+ DJ) from 0.25Gbps to

RJ

RMS

1.65Gbps

Subtract source j itter for DJ, 0 to 15dB FR4 loss at
825MHz (Note 1)

0.2 UI

P-P

MAX3814

DVI/HDMI TMDS FR-4 and

Cable Equalizer/Driver

_______________________________________________________________________________________ 3

SPECIFICATION TABLES (continued)

(Typical values measured at VCC= 3.3V, TA= +25°C; external terminations = 50Ω ±1%; min/max values valid over VCC= 3.3V
±0.3V, T

A

= 0°C to +70°C; with external terminations = 50Ω ±1% to voltage = 3.3V ±0.7V. Tested at 1.65Gbps. AC parameters guar-

anteed by design and characterization.)

CML INPUTS

CML OUTPUTS

PARAMETER CONDITIONS MIN TYP MAX UNITS

DC PARAMETERS

V

-

Common-Mode Input Voltage

Input Termination Voltage When disconnected from source

Single-Ended Input Termination With 50Ω load, each side to V

AC PARAMETERS

Differential Input Return Loss < 1.6GHz 14 dB

CC

CC

400

V

-

CC

10

45 50 55 Ω

VCC +

100

VCC +

10

mV

mV

PARAMETER CONDITIONS MIN TYP MAX UNITS

DC PARAMETERS

Differential Output-Voltage Swing

Single-Ended High Output
Voltage

Single-Ended Low Output
Voltage

Output Voltage When ENABLE
Disabled

AC PARAMETERS

Output, Rise/Fall Time

With 50Ω load, each side to VCC;
LEVEL = low

With 50Ω load, each side to V
LEVEL = high; 200Ω back termination

LEVEL = low

LEVEL = low

LEVEL = low, ENABLE = high

20% to 80%; with 50Ω load,
each side to V

CC

CC

;

900 1050 1200

900 1050 1200

V

-

CC

10

V

-

CC

600

V

-

CC

10

80 170 230 ps

VCC +

10

VCC -

400

VCC +

10

mV

P-P

mV

mV

mV

Typical Operating Characteristics

(VCC= +3.3V, TA= +25°C, unless otherwise noted. Residual jitter is measured directly from the eye diagram histogram after 5000 hits.)

MAX3814

DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver

4 _______________________________________________________________________________________

Note 1: The specified FR-4 loss is from 12-mil traces, 7-mil spacing, and 6-mil depth (Prepreg) with no solder mask. The test pattern

is a 2

7

- 1, 20 zeros, inverted 2

7 -

1, and 20 ones.

LVTTL/LVCMOS AND OPEN-COLLECTOR LVTTL

SPECIFICATION TABLES (continued)

(Typical values measured at VCC= 3.3V, TA= +25°C; external terminations = 50Ω ±1%; min/max values valid over VCC= 3.3V
±0.3V, T

A

= 0°C to +70°C; with external terminations = 50Ω ±1% to voltage = 3.3V ±0.7V. Tested at 1.65Gbps. AC parameters guar-

anteed by design and characterization.)

DC PARAMETERS

LVTTL Input High Voltage 2.0 V

LVTTL Input Low Voltage 0.8 V

LVTTL Input High Current -100 +100 μA

LVTTL Input Low Current -100 +100 μA

PARAMETER CONDITIONS MIN TYP MAX UNITS

POWER-SUPPLY CURRENT

vs. TEMPERATURE

150

LEVEL = HIGH

MAX3814 toc01

100

LEVEL = LOW

50

POWER-SUPPLY CURRENT (mA)

0

070

TEMPERATURE (°C)

605040302010

MAX3814 INPUT: EYE DIAGRAM OF

1.65Gbps DATA AFTER 80in OF FR-4

/div

P-P

140mV

MAX3814 toc02

100ps/div

MAX3814 OUTPUT: EYE DIAGRAM OF MAX3814

EQUALIZING 1.65Gbps DATA AFTER 80in OF FR-4

/div

P-P

140mV

100ps/div

MAX3814 toc03

MAX3814

DVI/HDMI TMDS FR-4 and

Cable Equalizer/Driver

_______________________________________________________________________________________

5

Typical Operating Characteristics (continued)

(VCC= +3.3V, TA= +25°C, unless otherwise noted. Residual jitter is measured directly from the eye diagram histogram after 5000 hits.)

SINGLE-ENDED/DIFFERENTIAL INPUT

RETURN LOSS (S11/SDD11)

MAX3814 toc07

FREQUENCY (MHz)

GAIN (dB)

20001000

-25

-20

-15

-10

-5

0

-30
0 3000

(INPUT SIGNAL LEVEL = 0dBm)
(OUTPUT DISABLED)

SDD11

S11

DETERMINISTIC JITTER vs.

LENGTH OF FR-4 BOARD

MAX3814 toc08

LENGTH OF FR-4 (in)

DJ (ps)

908070605040302010

50

100

150

200

250

0

0 100

(SOURCE SIGNAL LEVEL = 700mV

P-P

/1200mV

P-P

,
DATA RATE = 0.825Gbps AND 1.65Gbps,
LOSS = 0.209dB/in AT 820MHz)

700mV

P-P

1200mV

P-P

1.65Gbps

825Mbps

700mV

P-P

DETERMINISTIC JITTER vs.
LENGTH OF 24 AWG CABLE

MAX3814 toc09

LENGTH OF 24 AWG CABLE (ft)

DJ (ps)

3530252015105

10

20

30

40

50

0

040

1.65Gbps

(SOURCE SIGNAL LEVEL = 700mV

P-P

,

DATA RATE = 1.65Gbps AND 2.25Gbps,

CABLE LOSS = 0.261dB/ft AT 1.12GHz)

2.25Gbps

DETERMINISTIC JITTER

FOR 28 AWG TWIN AX CABLE

MAX3814 toc10

LENGTH OF TWIN AX CABLE (ft)

DJ (ps)

40302010

50

100

150

200

0

050

VIN = 700mV

P-P

VIN = 1200mV

P-P

(SOURCE SIGNAL LEVEL = 700mV

P-P

/1200mV

P-P

,
DATA RATE = 1.65Gbps,
LOSS = 0.358dB/ft AT 820MHz)

RESIDUAL JITTER DUE TO POWER-SUPPLY

SINUSOIDAL NOISE

MAX3814 toc11

NOISE FREQUENCY (MHz)

RESIDUAL JITTER (ps)

1010.10.01

20

40

60

80

100

0

0.001 100

NO NOISE

50mV NOISE

(SOURCE SIGNAL LEVEL = 700mV

P-P

,

NOISE SIGNAL LEVEL = 50mV

P-P

,

DATA RATE = 1.65Gbps, 60in FR-4)

RESIDUAL JITTER

MAX3814 toc12

INPUT SIGNAL LEVEL (mV

P-P

)

RESIDUAL JITTER (ps)

15001100700

50

100

150

0

300

(SOURCE SIGNAL LEVEL = 300mV

P-P

TO 1800mV

P-P

,
DATA RATE = 1.65Gbps, 60in OF FR-4 BOARD,
FR-4 LOSS = 12.61dB AT 820MHz)

MAX3814 OUTPUT: 1.65Gbps DATA AFTER

30ft OF TENSOLITE 28 AWG CABLE

/div

P-P

140mV

100ps/div

MAX3814 toc04

MAX3814 OUTPUT: 250Mbps DATA AFTER

30ft OF TENSOLITE 28 AWG CABLE

/div

P-P

140mV

100ps/div

MAX3814 toc05

MAX3814 OUTPUT: 2.25Gbps DATA AFTER

33ft OF 24 AWG SPECTRA STRIP CABLE

125mV/div

74ps/div

MAX3814 toc06