19-1550; Rev 6; 11/04
3.0V to 5.5V, 1.25Gbps/2.5Gbps
LAN Laser Drivers
General Description
The MAX3286/MAX3296 series of products are high-
speed laser drivers for fiber optic LAN transmitters opti-
mized for Gigabit Ethernet applications. Each device
contains a bias generator, laser modulator, and com-
prehensive safety features. Automatic power control
(APC) adjusts the laser bias current to maintain aver-
age optical power at a constant level, regardless of
changes in temperature or laser properties. For lasers
without a monitor photodiode, these products offer a
constant-current mode. The circuit can be configured
for use with conventional shortwave (780nm to 850nm)
or longwave (1300nm) laser diodes, as well as vertical-
cavity surface-emitting lasers (VCSELs).
The MAX3286 series (MAX3286–MAX3289) is opti-
mized for operation at 1.25Gbps, and the MAX3296
series (MAX3296–MAX3299) is optimized for 2.5Gbps
operation. Each device can switch 30mA of laser mod-
ulation current at the specified data rate. Adjustable
temperature compensation is provided to keep the opti-
cal extinction ratio within specifications over the operat-
ing temperature range. This series of devices is
optimized to drive lasers packaged in low-cost TO-46
headers. Deterministic jitter (DJ) for the MAX3286 is
typically 22ps, allowing a 72% margin to Gigabit
Ethernet DJ specifications.
These laser drivers provide extensive safety features to
guarantee single-point fault tolerance. Safety features
include dual enable inputs, dual shutdown circuits, and
a laser-power monitor. The safety circuit detects faults
that could cause dangerous light output levels. A pro-
grammable power-on reset pulse initializes the laser
driver at startup.
The MAX3286/MAX3296 are available in a compact, 5mm
✕
5mm, 28-pin QFN or thin QFN package; a 5mm
✕
5mm,
32-pin TQFP package; or in die form. The MAX3287/
MAX3288/MAX3289 and MAX3297/MAX3298/MAX3299
are available in a 16-pin TSSOP-EP package.
Features
♦
7ps Deterministic Jitter (MAX3296)
22ps Deterministic Jitter (MAX3286)
♦
+3.0V to +5.5V Supply Voltage
♦
Selectable Laser Pinning (Common Cathode or
Common Anode) (MAX3286/MAX3296)
♦
30mA Laser Modulation Current
♦
Temperature Compensation of Modulation Current
♦
Automatic Laser Power Control or Constant
Bias Current
♦
Integrated Safety Circuits
♦
Power-On Reset Signal
♦
QFN and Thin QFN Packages Available
MAX3286–MAX3289/MAX3296–MAX3299
Ordering Information
PART
MAX3286CTI+
MAX3286CGI
MAX3286CHJ
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
28 Thin QFN
(5mm x 5mm)****
28 QFN
(5mm x 5mm)***
32 TQFP
(5mm x 5mm)
Ordering Information continued at end of data sheet.
*Dice
are designed to operate from T
J
= 0°C to +110°C, but
are tested and guaranteed only at T
A
= +25°C.
**Exposed
pad.
***Package
Code: G2855-1
****Package
Code: T2855-7
+Denotes
Lead-Free Package.
Pin Configurations
OUT+
OUT-
V
CC
V
CC
28
TC
27
26
25
24
23
Applications
Gigabit Ethernet Optical Transmitter
Fibre Channel Optical Transmitter
ATM LAN Optical Transmitter
FAULT
FAULT
POR
GND
EN
EN
PORDLY
1
2
3
4
5
6
7
+
22
V
CC
TOP VIEW
MODSET
21
20
19
BIASDRV
SHDNDRV
GND
MON
MD
POL
POL
MAX3286
MAX3296
18
17
16
15
10
11
12
13
GND
FLTDLY
LV
IN+
V
CC
IN-
Typical Application Circuits and Selector Guide appear at
end of data sheet.
THIN QFN*
*Exposed
pad is connected to GND.
Pin Configurations continued at end of data sheet.
________________________________________________________________
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.
REF
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
