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PDF MAX3815A Data sheet ( Hoja de datos )
| Número de pieza | MAX3815A | |
| Descripción | TMDS Digital Video Equalizer | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4822; Rev 0; 7/09
EVAALVUAAILTAIOBNLEKIT
www.DataSheet4U.com
TMDS Digital Video Equalizer for
HDMI/DVI Cables
General Description
The MAX3815A cable equalizer automatically provides
compensation for DVI™ and HDMI™ v1.3 cables. It
extends the usable cable distance up to 40 meters
(1.65Gbps) and 35 meters (2.25Gbps). The MAX3815A
is designed to equalize signals encoded in the transition-
minimized differential signaling (TMDS®) format.
The MAX3815A 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 signal.
The outputs include a disable function. Upon LOS, the
chip is powered down. For direct chip-to-chip communi-
cation, the output drivers can be switched to one-half the
DVI output specification to conserve power and reduce
EMI. The output drive current can also be increased to
allow the use of back termination resistors for improved
signal integrity. Equalization can be automatic or set to
manual control for specific in-cable applications.
The MAX3815A 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 HDMI/DVI Inputs
High-Definition Televisions and Displays
HDMI/DVI-D Cable-Extender Modules and Active
Cable Assemblies
LCD Computer Monitors
HDMI 1.3 Deep Color Systems
Features
S Guaranteed Performance to 2.25Gbps (HDMI 1.3),
Improved Jitter Performance at Low Source
Amplitude, and Enhanced Output Driver
S Extends 2.25Gbps TMDS Interface Length
0 to 35 Meters Over HDMI Cable, 24 AWG
0 to 22 Meters Over HDMI Cable, 28 AWG
S Extends 1.65Gbps TMDS Interface Length
0 to 40 Meters Over HDMI Cable, 24 AWG
0 to 28 Meters Over HDMI Cable, 28 AWG
S Compatible with HDTV Resolutions 720p, 1080i,
1080p, and 1080p with 36-Bit Color
S Compatible with Computer Resolutions VGA,
SVGA, XGA, SXGA, UXGA, and WUXGA
S Fully Automatic Equalization, No System Control
Required
S 3.3V Power Supply
S Power Dissipation of 0.6W (typ)
S 7mm x 7mm, 48-Pin TQFP Lead-Free Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3815ACCM+
0NC to +70NC
48 TQFP-EP*
+Denotes a lead(Pb)-free/RoHS compliant package.
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
Typical Operating Circuits
HDMI OR DVI EXTENDER BOX
VIDEO SOURCE
UP TO 35m OF HDMI
OR
DVI CABLE
MAX3815A
EQUALIZER
MAX3816A
DDC EXTENDER
STANDARD LENGTH
DVI-D OR HDMI CABLE
HDTV
Typical Operating Circuits continued at end of data sheet.
DVI is a trademark of Digital Display Working Group.
HDMI is a trademark of HDMI Licensing, LLC.
TMDS is a registered trademark of Silicon Image Inc.
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
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TMDS Digital Video Equalizer for
HDMI/DVI Cables
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, equalizer
in automatic mode, cable launch amplitude 1VP-P differential, unless otherwise noted.)
TOTAL JITTER vs. CABLE LENGTH (CARLISLE
INTERCONNECT TECHNOLOGIES TWIN-AX 28 AWG)
0.6
0.5 2.25Gbps
0.4 1.485Mbps
0.3 742.5Mbps
0.2 NO EQ
WITH MAX3815A EQ
0.1
0
0 10 20 30 40
CABLE LENGTH (m)
TOTAL JITTER vs. SIGNAL AMPLITUDE INPUT
TO CABLE (DATA RATE 2.25Gbps)
130
50m OF DVIGear SHR HDMI CABLE
120 WITH 35dB LOSS AT 1.11GHz
110
100
90
80
70
60
50
0.4
0.6 0.8 1.0 1.2 1.4
DIFFERENTIAL AMPLITUDE (VP-P)
1.6
EQCONTROL VOLTAGE (RELATIVE TO VCC)
vs. CABLE LENGTH (MANUAL EQ CONTROL)
0 200MAX3815A toc10
CABLE IS CARLISLE INTERCONNECT
-0.1 TECHNOLOGIES TWIN-AX 28 AWG WITH
180
APPROXIMATELY 1.35dB OF LOSS
-0.2 PER METER AT 1.11GHz
160
140
-0.3
EQCONTROL VOLTAGE
-0.4
120
100
-0.5
-0.6
-0.7
-0.8
0
RESIDUAL JITTER
AT 2.25Gbps
10 20
CABLE LENGTH (m)
80
60
40
20
0
30
LOSS-OF-CLOCK ASSERT THRESHOLD
vs. CABLE LENGTH
350
CLOCK AMPLITUDE IS AT INPUT OF CABLE
300
CABLE IS CARLISLE INTERCONNECT
TECHNOLOGIES TWIN-AX, 28 AWG
250
225MHz CLOCK
200 FREQUENCY
150
100
25MHz CLOCK
FREQUENCY
50
0
0 6 12 18 24 30 36
CABLE LENGTH (m)
EQUALIZER OUTPUT EYE AFTER 50m OF 22 AWG
HDMI CABLE (DATA RATE = 2.25Gbps)
MAX3815A toc12
DVIGear SHR HDMI CABLE
200mV/div
100ps/div
_______________________________________________________________________________________ 5
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TMDS Digital Video Equalizer for
HDMI/DVI Cables
Typical Operating Circuits (continued)
LAPTOP
VGA INPUT
DVI-D INPUT
DVI-D CABLE UP
TO 35m OR 120ft
(24 AWG STP)
MAX3815A
EQUALIZER
VIDEO PROJECTOR
RGB/HV
ADC/SYNC
TMDS
DESERIALIZER
IMAGE
SCALER AND
PROCESSOR
PANEL
INTERFACE
TIMING AND
DRIVERS
LCD,
DLP,
OR
LCOS
Pin Configuration
TOP VIEW
VCC 1
RX0_IN- 2
RX0_IN+ 3
VCC
VCC
RX1_IN-
4
5
6
RX1_IN+ 7
VCC 8
VCC 9
RX2_IN- 10
RX2_IN+ 11
VCC 12
48 47 46 45 44 43 42 41 40 39 38 37
+
MAX3815A
*EP
13 14 15 16 17 18 19 20 21 22 23 24
36 GND
35 RX0_OUT-
34 RX0_OUT+
33 GND
32 GND
31 RX1_OUT-
30 RX1_OUT+
29 GND
28 GND
27 RX2_OUT-
26 RX2_OUT+
25 GND
*EXPOSED PAD.
TQFP
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
11
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX3815A.PDF ] | |
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