EVALUATION KIT AVAILABLE MAX3643 155Mbps to 2.5Gbps Burst-Mode Laser Driver General Description Features The MAX3643 burst-mode laser driver provides bias and 10mA to 85mA Modulation Current modulation current drive for PON burst-mode ONT appli- 1mA to 70mA Bias Current cations. It is specifically designed for use with a low-cost external controller for the APC (and if desired, AMC) loop. Monitor Diode Sample and Hold A high-speed differential burst-enable input enables the 45ps Output Transition Time driver to switch the laser from a dark (output off) condition to full on-condition in less than 2ns. When BEN is inac- 2ns Turn-On/-Off Time tive, typical modulation and bias currents are 5A each. Reference Voltage Generator Laser modulation current can be set from 10mA to 85mA and bias current can be set from 1mA to 70mA LVPECL High-Speed Inputs (Data, Burst Enable) using the MODSET and BIASSET inputs. A sample-and- hold circuit is provided to capture the monitor diode Ordering Information output during short PON bursts, if needed, and the BEN PART TEMP RANGE PIN-PACKAGE high-speed signal is mirrored on an LVCMOS output to MAX3643ETG -40C to +85C 24 TQFN-EP* be used by the controller operating the APC/AMC loop. MAX3643ETG+ -40C to +85C 24 TQFN-EP* The MAX3643 burst-mode laser driver is packaged in a 4mm x 4mm, 24-pin thin QFN package. It operates from +Denotes a lead(Pb)-free/RoHS-compliant package. -40C to +85C. *EP = Exposed paddle. Applications Pin Configuration appears at end of data sheet. A/B/G/XGPON ONT Modules Up to 2.5Gbps 1.25Gbps IEEE EPON ONT Modules Typical Application Circuit 3.3V 15 10nH 3.3V +3.3V FILTER 130 130 V CC 15 SERIAL Z = 50 IN+ 0 OUT- DATA Z = 50 IN- 0 SOURCE 5.6 OUT+ 82 82 10pF 5.6 75 1k BIAS+ MAX3643 27pF 3.3V +3.3V 10 BIAS- 130 130 MDIN BEN+ Z = 50 0 BURST CONTROL Z0 = 50 BEN- MDOUT 82 82 BMD MON1 3k 1k 1k DS1875 PON TRIPLEXER AND SFP CONTROLLER BEN BIAS MOD For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com. 19-3848 Rev 4 12/12 EN GND IMAX VMSET MODSET VREF VBSET BIASSET BENOUT BCMONMAX3643 155Mbps to 2.5Gbps Burst-Mode Laser Driver ABSOLUTE MAXIMUM RATINGS Supply Voltage V ..............................................-0.5V to +4.0V Operating Temperature Range ...........................-40C to +85C CC Current into BIAS-, BIAS+, OUT-, OUT+ .......-20mA to +150mA Storage Temperature Range ............................-55C to +150C Voltage at VMSET, VBSET, IN+, IN-, BEN+, BEN-, EN, MDIN, Lead Temperature (soldering, 10s) .................................+300C MDOUT, BENOUT, BCMON ...................-0.5V to (V + 0.5V) Soldering Temperature (reflow) CC Voltage at MODSET, BIASSET, VREF, IMAX ........-0.5V to +3.0V Lead(Pb)-free..............................................................+260C Voltage at OUT-, OUT+, BIAS-, BIAS+ .....+0.3V to (V + 0.5V) Containing lead(Pb)....................................................+240C CC Continuous Power Dissipation (T = +85C) A 24-Pin TQFN, Multilayer Board (derate 27.8mW/C above +85C)............................1807mW 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. OPERATING CONDITIONS PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Turn-On Time 10% to 90% 0.001 1000 ms Ambient Temperature -40 +85 C Data Rate 2500 Mbps Voltage at VMSET, VBSET 0 1.4 V Voltage at BCMON 0 1.4 V Voltage at MDIN 0 2.56 V ELECTRICAL CHARACTERISTICS (V = 3.0V to 3.6V, T = -40C to +85C. Typical values are at V = 3.3V, T = +25C, I = 20mA, I = 30mA, unless other- CC A CC A BIAS MOD wise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Excluding laser bias and mode currents, Supply Current I 32 51 mA CC max at I = 85mA, I = 70mA MOD BIAS I/O SPECIFICATIONS LVPECL Differential Input V V = (V ) - (V) 200 1600 mV IN IN IN+ IN- P-P LVPECL Common-Mode Input V - V - V - CC CC CC V V CM Voltage 1.49 1.32 V / 4 IN V - CC LVCMOS Output High Voltage I = -100A V OH 0.2 LVCMOS Output Low Voltage I = 100A 0.2 V OL C = 20pF, from BEN zero crossing to 67% L BENOUT Propagation Delay T 30 ns d CMOS level LVCMOS Input Pullup 75 k LVCMOS Input Current V = 0V or V = V 50 A IN IN CC LVCMOS Input High Voltage 2.0 V V CC LVCMOS Input Low Voltage 0.2 0.8 V BIAS GENERATOR SPECIFICATIONS Bias Current Range I V , V 0.6V 1 70 mA BIAS BIAS+ BIAS- Bias Current, Burst Off I BEN = low or EN = high 5 50 A BIAS, OFF 1mA I < 2mA, VBSET = VREF 88 BIAS BIASSET Current Gain G mA/mA BIAS 2mA I < 10mA, VBSET = VREF 70 88 110 BIAS 10mA I < 70mA, VBSET = VREF 82.5 88 94.5 BIAS 2 Maxim Integrated