MAX3737ETJ+T Maxim Integrated Products, MAX3737ETJ+T Datasheet

IC LSR DRVR 2.7GBPS 3.63V 32TQFN

MAX3737ETJ+T

Manufacturer Part Number
MAX3737ETJ+T
Description
IC LSR DRVR 2.7GBPS 3.63V 32TQFN
Manufacturer
Maxim Integrated Products
Type
Laser Diode Driver (Fiber Optic)r
Datasheet
1.MAX3737ETJ.pdf (17 pages)

Specifications of MAX3737ETJ+T

Data Rate
2.7Gbps
Number Of Channels
1
Voltage - Supply
2.97 V ~ 3.63 V
Current - Supply
47mA
Current - Modulation
85mA
Current - Bias
100mA
Operating Temperature
-40°C ~ 85°C
Package / Case
32-WFQFN Exposed Pad
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-2818; Rev 2; 7/04
Functional Diagram and Typical Application Circuit appear
at end of data sheet.
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.
Multirate OC-3 to OC-48 FEC Transceivers
Gigabit Ethernet SFF/SFP and GBIC
Transceivers
1Gbps/2Gbps Fibre Channel SFF/SFP and GBIC
Transceivers
________________________________________________________________ Maxim Integrated Products
General Description
Multirate Laser Driver with Extinction
Applications
♦ Single +3.3V Power Supply
♦ 47mA Power-Supply Current
♦ 85mA Modulation Current
♦ 100mA Bias Current
♦ Automatic Power Control (APC)
♦ Modulation Compensation
♦ On-Chip Temperature Compensation
♦ Self-Biased Inputs for AC-Coupling
♦ Ground-Referenced Current Monitors
♦ Laser Safety, Shutdown, and Alarm Outputs
+Denotes lead-free packaging.
MAX3737ETJ
MAX3737ETJ+
MAX3737EGJ
Pin Configurations continued at end of data sheet.
*THE EXPOSED PADDLE MUST BE SOLDERED TO SUPPLY GROUND
TX_DISABLE
TOP VIEW
TO ACHIEVE SPECIFIED PERFORMANCE.
PC_MON
BC_MON
PART
GND
V
V
IN+
IN-
CC
CC
1
2
3
4
5
6
7
8
Ordering Information
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ratio Control
5mm x 5mm
MAX3737EGJ
Pin Configurations
QFN
PIN-PACKAGE
32 Thin QFN
32 Thin QFN
32 QFN
Features
24 MD
23
22
21
20
19
18
17
V
OUT+
OUT+
OUT-
OUT-
V
BIAS
CC
CC
1

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MAX3737ETJ+T Summary of contents

Page 1

... Fibre Channel SFF/SFP and GBIC Transceivers Functional Diagram and Typical Application Circuit appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. ♦ Single +3.3V Power Supply ♦ ...

Page 2

Multirate Laser Driver with Extinction Ratio Control ABSOLUTE MAXIMUM RATINGS Supply Voltage V ...............................................-0.5V to +6.0V CC IN+, IN-, TX_DISABLE, TX_FAULT, SHUTDOWN, MC_MON, BC_MON, PC_MON, VBS, VMD, APCFILT1, APCFILT2, MD, TH_TEMP, MODTCOMP, MODBCOMP, MODSET, and APCSET Voltage .......................................-0. ...

Page 3

Multirate Laser Driver with Extinction ELECTRICAL CHARACTERISTICS (continued +2.97V to +3.63V -40°C to +85°C. Typical values are otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL Modulation-Current Setting Error Modulation Off Current Modulation-Current Monitor ...

Page 4

Multirate Laser Driver with Extinction Ratio Control (V = +3.3V 0.01µ 20mA APC BIAS OPTICAL EYE DIAGRAM 7 (2.7Gbps 1PRBS, 2.3GHz FILTER) 54ps/div OPTICAL EYE DIAGRAM 7 (155Mbps 1PRBS, 117MHz ...

Page 5

Multirate Laser Driver with Extinction (V = +3.3V 0.01µ 20mA APC BIAS MODULATION-CURRENT MONITOR GAIN vs. TEMPERATURE 300 290 280 270 260 250 240 230 220 210 200 -40 - TEMPERATURE ...

Page 6

Multirate Laser Driver with Extinction Ratio Control (V = +3.3V 0.01µ 20mA APC BIAS TEMPERATURE COMPENSATION vs. R TH_TEMP TH_TEMP 40 R TH_TEMP 2kΩ TH_TEMP ...

Page 7

Multirate Laser Driver with Extinction PIN NAME 1, 10, 15, 16 GND Ground Transmitter Disable, TTL. Laser output is disabled when TX_DISABLE is asserted high or left 2 TX_DISABLE unconnected. The laser output is enabled when this pin is asserted ...

Page 8

Multirate Laser Driver with Extinction Ratio Control VOLTAGE SINGLE ENDED DIFFERENTIAL ( CURRENT I + OUT TIME Figure 1. Required Input Signal and Output Polarity SOURCE NOISE VOLTAGE ...

Page 9

Multirate Laser Driver with Extinction INPUT BUFFER IN+ IN- SHUTDOWN SAFETY LOGIC AND POWER TX_FAULT DETECTOR TX_DISABLE R = 7.5kΩ PULL PC_MON R MDMON I BIAS 82 T > T BC_MON R BC_MON I MOD ...

Page 10

Multirate Laser Driver with Extinction Ratio Control Table 1. Typical Fault Conditions If any of the I/O pins is shorted to GND exceed the programmed threshold. 2 End-of-life (EOL) condition of the laser diode. The bias current ...

Page 11

Multirate Laser Driver with Extinction 100Ω resistor to ground at each monitor output gives the following relationships 268) MC_MON MOD 82) BC_MON BIAS ✕ PC_MON MD External sense resistors ...

Page 12

Multirate Laser Driver with Extinction Ratio Control = + × MOD MODS BIAS V = × REF I 268 MODS R MODSET ( ) = × MODT TH = ...

Page 13

Multirate Laser Driver with Extinction V CC TX_DISABLE PC_MON R PC_MON BC_MON R BC_MON MC_MON R MC_MON Figure 5. Simplified Safety Circuit MAX3737 16kΩ V PACKAGE CC 0.83nH 0.11pF 5kΩ 5kΩ 0.83nH 0.11pF 24kΩ Figure 6. Simplified Input ...

Page 14

Multirate Laser Driver with Extinction Ratio Control Exposed-Pad (EP) Package The exposed-pad on the 32-pin QFN provides a very low thermal resistance path for heat removal from the IC. The pad is also electrical ground on the MAX3737 and should ...

Page 15

Multirate Laser Driver with Extinction 0.1µF IN+ CDR 0.1µF IN- R MODBCOMP MODBCOMP R MODTCOMP MODTCOMP R TH_TEMP TH_TEMP ______________________________________________________________________________________ Typical Operating Circuit OPTIONAL SHUTDOWN +3.3V OUT- OUT+ BIAS MAX3737 MD C APC REPRESENTS A CONTROLLED-IMPEDANCE TRANSMISSION LINE Ratio Control ...

Page 16

Multirate Laser Driver with Extinction Ratio Control (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 16 ______________________________________________________________________________________ Package Information ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2004 Maxim Integrated Products Package Information (continued) 0 ...

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