MAX3737 19-2818 Rev 3 6/11 Multirate Laser Driver with Extinction Ratio Control General Description Features The MAX3737 is a 3.3V laser driver designed for Single 3.3V Power Supply multirate transceiver modules with data rates from 47mA Power-Supply Current 155Mbps to 2.7Gbps. Lasers can be DC-coupled to the 85mA Modulation Current MAX3737 for reduced component count and ease of multirate operation. 100mA Bias Current Laser extinction ratio control (ERC) combines the features Automatic Power Control (APC) of automatic power control (APC), modulation compensa- Modulation Compensation tion, and built-in thermal compensation. The APC loop On-Chip Temperature Compensation maintains constant average optical power. Modulation compensation increases the modulation current in pro- Self-Biased Inputs for AC-Coupling portion to the bias current. These control loops combined Ground-Referenced Current Monitors with thermal compensation maintain a constant optical Laser Safety, Shutdown, and Alarm Outputs extinction ratio over temperature and lifetime. The MAX3737 accepts differential data input signals. Ordering Information The wide 5mA to 60mA (up to 85mA AC-coupled) mod- ulation current range and up to 100mA bias current PART TEMP RANGE PIN-PACKAGE range makes the MAX3737 ideal for driving FP/DFB MAX3737ETJ -40C to +85C 32 Thin QFN-EP* lasers in fiber-optic modules. External resistors set the MAX3737ETJ+ -40C to +85C 32 Thin QFN-EP* required laser current levels. The MAX3737 provides transmit disable control (TX DISABLE), single-point MAX3737EGJ -40C to +85C 32 QFN-EP* fault tolerance, bias-current monitoring, modulation-cur- +Denotes a lead(Pb)-free/RoHS-compliant package. rent monitoring, and photocurrent monitoring. The *EP = Exposed pad. device also offers a latched failure output (TX FAULT) to indicate faults, such as when the APC loop is no Pin Configurations 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 TOP VIEW requirements. The MAX3737 is offered in a 5mm x 5mm 32-pin thin QFN and QFN package and operates over the -40C to +85C extended temperature range. GND 1 24 MD TX DISABLE 2 23 V CC Applications V 3 22 OUT+ CC Multirate OC-3 to OC-48 FEC Transceivers IN+ 4 21 OUT+ Gigabit Ethernet SFF/SFP and GBIC MAX3737EGJ IN- 5 20 OUT- Transceivers V 6 19 OUT- CC 1Gbps/2Gbps Fibre Channel SFF/SFP and GBIC PC MON 7 18 V CC Transceivers *EP BC MON 17 BIAS 8 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 Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE MC MON 9 32 MODTCOMP GND 10 31 TH TEMP V 11 30 MODBCOMP CC TX FAULT 12 29 MODSET SHUTDOWN 13 28 APCSET VBS 14 27 APCFILT2 GND 15 26 APCFILT1 GND 16 25 VMDMultirate Laser Driver with Extinction Ratio Control ABSOLUTE MAXIMUM RATINGS Supply Voltage V ...............................................-0.5V to +6.0V Continuous Power Dissipation (T = +85C) CC A IN+, IN-, TX DISABLE, TX FAULT, SHUTDOWN, QFN/TQFN (derate 21.2mW/C above +85C) ................1.3W MC MON, BC MON, PC MON, VBS, VMD, Operating Junction Temperature Range...........-55C to +150C APCFILT1, APCFILT2, MD, TH TEMP, Storage Temperature Range .............................-55C to +150C MODTCOMP, MODBCOMP, MODSET, and Lead Temperature (soldering, 10s) .................................+300C APCSET Voltage .......................................-0.5V to V + 0.5V Soldering Temperature (reflow) CC OUT+, OUT-, BIAS Current.............................-20mA to +150mA Lead(Pb)-free...............................................................+260C Containing lead(Pb).....................................................+240C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 2.97V to 3.63V, T = -40C to +85C. Typical values are at V = 3.3V, I = 60mA, I = 60mA, T = +25C, unless other- CC A CC BIAS MOD A wise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Current I (Note 3) 47 60 mA CC Power-Supply Noise Rejection PSNR f 1MHz, 100mV (Notes 4, 6) 33 dB P-P I/O SPECIFICATIONS Differential Input Swing V DC-coupled, Figure 1 0.2 2.4 V ID P-P V - CC Common-Mode Input V 1.7 V CM V /4 ID LASER BIAS Bias-Current Setting Range 1 100 mA Bias Off Current TX DISABLE = high 0.1 mA Bias-Current Monitor Ratio I /I 62 76 90 mA/mA BIAS BC MON LASER MODULATION Modulation-Current Setting I (Note 5) 5 85 mA MOD Range 5mA I 10mA 71 80 20% to 80% MOD Output Edge Speed ps (Notes 6, 7) 10mA < I 85mA 52 80 MOD Output Overshoot/Undershoot (Note 7) 6 % Random Jitter (Notes 6, 7) 0.65 1.3 ps 5mA I 10mA 25.6 40 MOD 2.7Gbps 10mA < I 85mA 16 40 MOD 5mA I 10mA 32 41 MOD 1.25Gbps 10mA < I 85mA 15 41 MOD Deterministic Jitter (Notes 6, 8) ps P-P 5mA I 10mA 39 46 MOD 622Mbps 10mA < I 85mA 21 46 MOD 5mA I 10mA 65 100 MOD 155Mbps 10mA < I 85mA 46 70 MOD Modulation-Current Temperature (Note 6) 150 480ppm/C Stability 2 MAX3737