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MAX3863

Description
2.7Gbps Laser Driver with Modulation Compensation
File Size468KB,15 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX3863 Overview

2.7Gbps Laser Driver with Modulation Compensation

19-2281; Rev 2; 5/03
2.7Gbps Laser Driver with Modulation
Compensation
General Description
The MAX3863 is designed for direct modulation of laser
diodes at data rates up to 2.7Gbps. An automatic
power-control (APC) loop is incorporated to maintain a
constant average optical power. Modulation compensa-
tion is available to increase the modulation current in
proportion to the bias current. The optical extinction
ratio is then maintained over temperature and lifetime.
The laser driver can modulate laser diodes at ampli-
tudes up to 80mA. Typical (20% to 80%) edge speeds
are 50ps. The MAX3863 can supply a bias current up
to 100mA. External resistors can set the laser output
levels.
The MAX3863 includes adjustable pulse-width control
to minimize laser pulse-width distortion. The device
offers a failure monitor output to indicate when the APC
loop is unable to maintain the average optical power.
The MAX3863 accepts differential CML clock and data
input signals with on-chip 50Ω termination resistors. If a
clock signal is available, an input data-retiming latch
can be used to reject input pattern-dependent jitter.
The laser driver is fabricated with Maxim’s in-house
second-generation SiGe process.
Single +3.3V Power Supply
58mA Power-Supply Current
Up to 2.7Gbps (NRZ) Operation
On-Chip Termination Resistors
Automatic Power Control (APC)
Compensation for Constant Extinction Ratio
Programmable Modulation Current Up to 80mA
Programmable Bias Current Up to 100mA
50ps Typical Rise/Fall Time
Pulse-Width Adjustment Circuit
Selectable Data-Retiming Latch
Failure Detector
Features
MAX3863
Mark-Density Monitor
Current Monitors
ESD Protection
Ordering Information
PART
MAX3863EGJ
MAX3863E/D*
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
32 QFN
Dice
PKG
CODE
G3255-1
*Dice
are designed and guaranteed to operate from -40°C to
+85°C, but are tested only at T
A
= +25°C
Applications
SONET and SDH Transmission Systems
30
BIASMAX
32 RTEN
Pin Configuration
28 MODCOMP
3.2Gbps Data Communications
Add/Drop Multiplexers
Digital Cross-Connects
Section Regenerators
Long-Reach Optical Transmitters
V
CC
27
V
CC
WDM Transmission Systems
TOP VIEW
26
BIASMON
29 MODSET
31 EN
25
MODMON
1
2
3
4
5
6
7
8
24
23
22
MDMON
MD
V
CC
DATA+
DATA-
V
CC
V
CC
MAX3863
21
20
19
18
17
MODN
MOD
V
CC
CLK+
CLK-
V
CC
BIAS
FAIL
APCFILT1 10
APCFILT2 11
PWC+ 12
PWC- 13
THE EXPOSED PAD MUST BE SOLDERED TO GND ON THE CIRCUIT BOARD.
________________________________________________________________
Maxim Integrated Products
APCSET
Covered by U.S. patent number 5,883,910. Other patents
pending.
MK+
15
MK-
16
V
CC
14
9
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.

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