MAX3863 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 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.
Applications
SONET and SDH Transmission Systems
WDM Transmission Systems
3.2Gbps Data Communications
Add/Drop Multiplexers
Digital Cross-Connects
Section Regenerators
Long-Reach Optical Transmitters
Features
♦ 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
♦ Mark-Density Monitor
♦ Current Monitors
♦ ESD Protection
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
PKG
CODE
MAX3863EGJ -40°C to +85°C
MAX3863E/D* -40°C to +85°C
32 QFN
Dice
G3255-1
—
*Dice are designed and guaranteed to operate from -40°C to
+85°C, but are tested only at T_A = +25°C
Pin Configuration
TOP VIEW
V_CC 1
DATA+ 2
DATA- 3
V_CC 4
V_CC 5
CLK+ 6
CLK- 7
V_CC 8
MAX3863
24 MDMON
23 MD
22 V_CC
21 MODN
20 MOD
19 V_CC
18 BIAS
17 ^FAIL
Covered by U.S. patent number 5,883,910. Other patents
pending.
THE EXPOSED PAD MUST BE SOLDERED TO GND ON THE CIRCUIT BOARD.
________________________________________________________________ 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.