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PDF MAX3802 Data sheet ( Hoja de datos )
| Número de pieza | MAX3802 | |
| Descripción | 3.2Gbps Quad Adaptive Cable Equalizer with Cable Driver | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-2289; Rev 0; 1/02
EVAALVUAAILTAIOBNLEKIT 3.2Gbps Quad Adaptive Cable Equalizer
with Cable Driver
General Description
The MAX3802 has four independent adaptive cable
equalizers and cable drivers on a single chip. It is
designed for coaxial and twin-axial cable point-to-point
scrambled-data communication applications. The dri-
ver features differential current-mode logic (CML)
inputs and outputs. The equalizer includes differential
CML data inputs and outputs and a TTL loss-of-signal
(LOS) output.
The adaptive cable equalizer can equalize differential
or single-ended signals at data rates up to 3.2Gbps. It
automatically adjusts to attenuation caused by skin-
effect losses of 30dB at 1.6GHz. The equalizer effec-
tively extends the usable length of copper cable in
high-frequency interconnect applications.
Applications
High-Speed Links in Communications and Data
Systems
Backplane and Twin-Axial Cable Interconnects
Category 5 UTP-Based Systems
Digital Video Systems
Pin Configuration appears at end of data sheet.
3.3V
Features
o Single 3.3V Operation
o Four Independent Equalizers and Drivers
o 725mW at 3.3V Typical Power Dissipation
o Data Rates Up to 3.2Gbps
o Equalizer Automatically Adjusts for Different
Cable Lengths
o 0 to 30dB Equalization at 1.6GHz (3.2Gbps)
o Loss-of-Signal (LOS) Indicator
o On-Chip Input and Output Terminations
o Low External Component Count
o 0°C to +85°C Operating Temperature Range
o ESD Protection on Cable Inputs and Outputs
PART
MAX3802UGK
*Exposed pad
Ordering Information
TEMP RANGE
0°C to +85°C
PIN-PACKAGE
68 QFN*
Typical Application Circuit
3.3V
EP* VCC
4 DIN_
DOUT_
CARD 1
MAX3802
4 EOUT_
EIN_
LOS_ RMOD_ CIM_
4 44
RMOD_
4
4
COAX, TWIN-AX, OR PC BOARD x 4
COAX, TWIN-AX, OR PC BOARD x 4
EP* VCC
4 EIN_
EOUT_
4
MAX3802
CARD 2
4 DOUT_
DIN_ 4
LOS_ RMOD_ CIM_
4 44
RMOD_
THIS SYMBOL INDICATES A CONTROLLED-IMPEDANCE TRANSMISSION LINE.
*EP MUST BE SOLDERED TO GROUND FOR
PROPER THERMAL AND ELECTRICAL PERFORMANCE.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
3.2Gbps Quad Adaptive Cable Equalizer
with Cable Driver
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA = +25°C, all jitter measurements done at 3.2Gbps, 600mV cable input with 213 - 1 PRBS pattern with 100 consecutive ones and
100 consecutive zeros substituted. Note: Test pattern produces near-worst-case jitter results. Results vary with pattern, unless otherwise noted.)
EQUALIZER RESIDUAL JITTER vs. CABLE
LENGTH (TENSOLITE TWIN-AX, 400mVP-P
DIFFERENTIAL INPUT)
85
EQUALIZER RESIDUAL JITTER vs. CABLE
LENGTH (RG179B 75Ω COAXIAL, 300mVP-P
SINGLE ENDED)
90
EQUALIZER RESIDUAL JITTER vs. LINE
LENGTH (FR-4 6mil STRIPLINE, 300mVP-P
SINGLE ENDED)
100
75
65
3.2Gbps
55
45
2.5Gbps
35
622Mbps
25
10 20 30 40 50 60 70
CABLE LENGTH (ft)
CIM VOLTAGE vs. CABLE LENGTH (TENSOLITE
TWIN-AX, 400mVP-P DIFFERENTIAL)
0.30
80
70
3.2Gbps
60
2.5Gbps
50
622Mbps
40
25
35 45
55
CABLE LENGTH (ft)
65
EQUALIZER INPUT AFTER 115ft OF
CABLE (TOP) EQUALIZER OUTPUT (BOTTOM)
90
80
70 3.2Gbps
60 2.5Gbps
50
622Mbps
40
40
50 60 70
LINE LENGTH (in)
80
90
EQUALIZER OUTPUT EYE DIAGRAM AFTER
155ft OF 50Ω GORE-89 CABLE (400mVP-P)
0.25
0.20
0.15
0.10
0.05
0
10 20 30 40 50 60 70
CABLE LENGTH (ft)
CABLE OUTPUT EYE DIAGRAM AFTER 70ft
OF TENSOLITE TWIN-AX CABLE (27 - 1 PRBS
NO EQUALIZATION)
EQUALIZER OUTPUT EYE DIAGRAM AFTER 70ft
OF TENSOLITE TWIN-AX CABLE (27 - 1 PRBS)
48ps/div (3.2Gbps)
EQUALIZER OUTPUT EYE DIAGRAM AFTER 72ft
OF 75Ω RG179 CABLE
(300mVP-P SINGLE ENDED, 223 - 1 PRBS)
60ps/div (2.5Gbps)
60ps/div (2.5Gbps)
48ps/div (3.2Gbps)
_______________________________________________________________________________________ 5
5 Page 
3.2Gbps Quad Adaptive Cable Equalizer
with Cable Driver
Package Information
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX3802.PDF ] | |
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