MAX3804 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – 12.5Gbps Settable Receive Equalizer

19-2713; Rev 1; 11/03
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12.5Gbps Settable Receive Equalizer
General Description
The MAX3804 driver with integrated analog equalizer
compensates up to 20dB of loss at 5GHz. It is designed
to ensure PC board signal integrity up to 12.5Gbps,
where frequency-dependent skin effect and dielectric
losses typically produce unacceptable amounts of inter-
symbol interference. The MAX3804 can extend the practi-
cal chip-to-chip transmission distance for 10Gbps NRZ
serial data up to 30in (0.75m) on FR-4, and it significantly
decreases deterministic jitter. Residual jitter after equal-
ization for 10.7Gbps signals is typically 24ps_P-P on the
maximum path length.
The MAX3804 is ideal for 10Gbps chip-to-chip serial
interconnections on inexpensive FR-4 material. Its
3mm ✕ 3mm package affords optimal placement and
routing flexibility. It has separate V_CC connections for
internal logic and current-mode logic (CML) I/O. This
allows the CML input and output to be referenced to iso-
lated supplies, providing independent DC-coupled inter-
facing to 1.8V, 2.5V, or 3.3V ICs. Eight discrete levels of
input equalization can be selected through a digital con-
trol input, enabling the equalizer to be matched to a
range of transmission line path loss. When correctly set to
match the path loss, the MAX3804 provides optimal per-
formance over a wide range of data rates and formats.
Applications
OC-192 and 10Gb Ethernet Switches and Routers
OC-192 and 10Gb Ethernet Serial Modules
High-Speed Signal Distribution
Features
o Compensates Up to 30in (0.75m) of 6-mil FR-4
Transmission Line Loss
o 115mW Operating Power
o Up to 12.5Gbps Data Rate
o Compatible with 8B10B, 64B66B, and PRBS Data
o Less than 30ps_P-P Residual Jitter After
Equalization
o 3-Bit Equalization Level Select Input
o 3mm x 3mm Thin QFN Package
o DC-Coupling to 1.8V, 2.5V, or 3.3V CML I/O
o -40°C to +85°C Operation
o +3.3V Core Supply Voltage
Ordering Information
PART
MAX3804ETE
TEMP RANGE
PIN-
PACKAGE
PACKAGE CODE
-40°C to +85°C ^{16 Thin QFN} T1633F-3
(3mm x 3mm)
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
+1.8V
+2.5V
+3.3V
V_CC
10Gbps
SERIAL OPTICAL
MODULE _SDO+
30in OF FR-4 STRIPLINE OR
MICROSTRIP TRANSMISSION LINE
V_CC1 V_CC V_CC2
SDI+ ^MAX3804 SDO+
IN
SDO-
+3.3V
SDI-
SDO-
EQ1 EQ2 EQ3 GND
V_CC
10Gbps
SERDES
SDI+
SDI-
________________________________________________________________ Maxim Integrated Products 1
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