MAX3805 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 10.7Gbps Adaptive Receive Equalizer

19-2936; Rev 0; 7/03
10.7Gbps Adaptive Receive Equalizer
General Description
The MAX3805 is designed to provide up to 30in
(0.75m) reach on 6-mil differential FR-4 transmission
line, or up to 24ft (8m) on RG-188A/U type coaxial
cable, for PRBS data from 9.95Gbps to 10.7Gbps. The
MAX3805 adaptive equalizer reduces intersymbol inter-
ference, resulting in 20ps residual jitter after equaliza-
tion. An internal feedback network controls the
equalizer to automatically match frequency-dependent
skin effect and dielectric losses. The MAX3805 pro-
vides LVCMOS-compatible output-enable and signal-
detect functions.
The MAX3805 has separate supply connections for the
internal logic and I/O circuits. This allows the current-
mode logic (CML) input and CML output to be connect-
ed to isolated supplies for independent DC-coupled
interfaces to 1.8V, 2.5V, or 3.3V ICs. The MAX3805
comes in a very small 3mm x 3mm package and con-
sumes only 135mW.
Applications
OC-192, 10GbE Switches and Routers
OC-192, 10GbE Serial Modules
High-Speed Signal Distribution
Features
o 3mm x 3mm Package
o Spans 30in (0.75m) of 6-mil FR-4
o Spans 24ft (8m) of Coax
o Automatic Receive Equalization to Reduce ISI
Caused by Path Losses
o Up to 10.7Gbps NRZ Data Operating Range
o Signal-Detect Output
o Output-Enable Control
o 135mW Power Consumption
o DC-Coupled Input and Output to Terminations as
Low as 1.65V
o Differential or Single-Ended Operation
o +3.3V Core Power Supply
Ordering Information
PART
TEMP RANGE ^PIN-
PACKAGE
MAX3805ETE -40°C to +85°C 16 Thin QFN
PACKAGE
CODE
T1633F-3
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
LINE CARD
2.5V
10Gbps
CDR/SERDES
Tx
2
2
Rx
FR-4 STRIPLINE
+3.3V
V_CC
2
SDO
MAX3805
2
SDI
V_CC2 SD EN V_CC1
SWITCH CARD
+3.3V
V_CC1
V_CC V_CC2
SDI
2
MAX3805
SDO
SD EN
2
1.8V
10Gbps
SWITCH
Rx
2
FR-4 STRIPLINE
2
Tx
2.5V
1.8V
________________________________________________________________ Maxim Integrated Products 1
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