MAX3737 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Multirate Laser Driver with Extinction Ratio Control

19-2818; Rev 1; 8/03
EVAALVUAAILTAIOBNLEKIT _{Multirate Laser Driver with Extinction}
Ratio Control
General Description
The MAX3737 is a +3.3V laser driver designed for
multirate transceiver modules with data rates from
155Mbps to 2.7Gbps. Lasers can be DC-coupled to the
MAX3737 for reduced component count and ease of
multirate operation.
Laser extinction ratio control (ERC) combines the features
of automatic power control (APC), modulation compensa-
tion, and built-in thermal compensation. The APC loop
maintains constant average optical power. Modulation
compensation increases the modulation current in pro-
portion to the bias current. These control loops combined
with thermal compensation maintain a constant optical
extinction ratio over temperature and lifetime.
The MAX3737 accepts differential data input signals.
The wide 5mA to 60mA (up to 85mA AC-coupled) mod-
ulation current range and up to 100mA bias current
range makes the MAX3737 ideal for driving FP/DFB
lasers in fiber-optic modules. External resistors set the
required laser current levels. The MAX3737 provides
transmit disable control (TX_DISABLE), single-point
fault tolerance, bias-current monitoring, modulation-cur-
rent monitoring, and photocurrent monitoring. The
device also offers a latched failure output (TX_FAULT)
to indicate faults, such as when the APC loop is no
longer able to maintain the average optical power at the
required level. The MAX3737 is compliant with the SFF-
8472 transmitter diagnostic and SFP MSA timing
requirements.
The MAX3737 is offered in a 5mm x 5mm 32-pin thin QFN
and QFN package and operates over the -40°C to +85°C
extended temperature range.
Applications
Multirate OC-3 to OC-48 FEC Transceivers
Gigabit Ethernet SFF/SFP and GBIC
Transceivers
1Gbps/2Gbps Fibre Channel SFF/SFP and GBIC
Transceivers
Features
o Single +3.3V Power Supply
o 47mA Power-Supply Current
o 85mA Modulation Current
o 100mA Bias Current
o Automatic Power Control (APC)
o Modulation Compensation
o On-Chip Temperature Compensation
o Self-Biased Inputs for AC-Coupling
o Ground-Referenced Current Monitors
o Laser Safety, Shutdown, and Alarm Outputs
PART
MAX3737ETJ
MAX3737EGJ
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 Thin QFN
32 QFN
Pin Configurations
TOP VIEW
GND 1
TX_DISABLE 2
V_CC 3
IN+ 4
IN- 5
V_CC 6
PC_MON 7
BC_MON 8
MAX3737EGJ
24 MD
23 V_CC
22 OUT+
21 OUT+
20 OUT-
19 OUT-
18 V_CC
17 BIAS
Functional Diagram and Typical Application Circuit appear
at end of data sheet.
5mm x 5mm
QFN
*THE EXPOSED PADDLE MUST BE SOLDERED TO SUPPLY GROUND
TO ACHIEVE SPECIFIED PERFORMANCE.
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.