MAX3800 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – 3.2Gbps Adaptive Equalizer and Cable Driver

19-1953; Rev 1; 11/01
3.2Gbps Adaptive Equalizer
and Cable Driver
General Description
The MAX3800 is a +3.3V adaptive cable equalizer and
cable driver implemented together on a single chip. It is
designed for coaxial and twin-axial cable point-to-point
communications applications. The driver features differ-
ential current-mode logic (CML) inputs and outputs as
well as adjustable output amplitude. The equalizer
includes differential CML data inputs and outputs, a
loss-of-signal (LOS) output, and a cable integrity moni-
tor (CIM) output.
The adaptive cable equalizer is capable of equalizing
differential or single-ended signals at data rates up to
3.2Gbps. It automatically adjusts to attenuation caused
by skin-effect losses of up to 30dB at 1.6GHz. The
equalizer effectively extends the usable length of cop-
per cable in high-frequency interconnect applications.
The MAX3800 is available in a 32-pin TQFP package
with exposed pad and consumes only 200mW at
+3.3V. The driver can be disconnected from the power
supply when it is not needed, resulting in a 40% reduc-
tion in supply current.
Features
o Single +3.3V Operation
o Typical Power Dissipation = 200mW at +3.3V
o Data Rates Up to 3.2Gbps
o Adjustable Cable Driver Output Amplitude
o Equalizer Automatically Adjusts for Different
Cable Lengths
o 0dB to 30dB Equalization at 1.6GHz (3.2Gbps)
o Loss-of-Signal (LOS) Indicator
o Cable Integrity Monitor (CIM)
o On-Chip Input and Output Terminations
o Low External Component Count
o Operating Temperature Range = 0°C to +85°C
o ESD Protection on Cable Inputs and Outputs
Applications
High-Speed Links in Communications
and Data Systems
Backplane and Interconnect Applications
SDH/SONET Transmission Equipment
PART
MAX3800UGJ
MAX3800UHJ
*EP = exposed pad
Ordering Information
TEMP. RANGE
0°C to +85°C
0°C to +85°C
PIN-PACKAGE
32 QFN
32 TQFP-EP*
Pin Configuration appears at end of data sheet.
+3.3V
DIN
DOUT
MAX3800
EOUT
EIN
LOS RMOD CIM
Typical Application Circuit
+3.3V
EIN
EOUT
MAX3800
DOUT
DIN
LOS RMOD CIM
THIS SYMBOL INDICATES A CONTROLLED-IMPEDANCE TRANSMISSION LINE.
________________________________________________________________ Maxim Integrated Products 1
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