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MAX3643ETG+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX3643ETG+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 14 page General Description The MAX3643 burst-mode laser driver provides bias and modulation current drive for PON burst-mode ONT applications. It is specifically designed for use with a low-cost external controller for the APC (and if desired, AMC) loop. A high-speed differential burst-enable input enables the driver to switch the laser from a dark (out- put off) condition to full on-condition in less than 2ns. When BEN is inactive, typical modulation and bias cur- rents are 5µA each. Laser modulation current can be set from 10mA to 85mA and bias current can be set from 1mA to 70mA using the MODSET and BIASSET inputs. A sample-and-hold circuit is provided to capture the monitor diode output during short PON bursts, if needed, and the BEN high-speed signal is mirrored on an LVCMOS output to be used by the controller operating the APC/AMC loop. The MAX3643 burst-mode laser driver is packaged in a 4mm x 4mm, 24-pin thin QFN package. It operates from -40°C to +85°C. Applications A/B/GPON ONT Modules up to 2.5Gbps 1.25Gbps IEEE EPON ONT Modules Features ♦ 10mA to 85mA Modulation Current ♦ 1mA to 70mA Bias Current ♦ Monitor Diode Sample and Hold ♦ 45ps Output Transition Time ♦ 2ns Turn-On/-Off Time ♦ Reference Voltage Generator ♦ LVPECL High-Speed Inputs (Data, Burst Enable) 155Mbps to 2.5Gbps Burst-Mode Laser Driver ________________________________________________________________ Maxim Integrated Products 1 PART TEMP RANGE PIN-PACKAGE MAX3643ETG -40°C to +85°C 24 TQFN-EP* MAX3643ETG+ -40°C to +85°C 24 TQFN-EP* Ordering Information OUT- VCC FILTER +3.3V OUT+ 10 Ω 15 Ω +3.3V 0.1 μF 24 Ω 27nH 10 Ω BIAS+ 15 Ω VCC RCOMP CCOMP START CONVERT ANALOG OUT ANALOG OUT ANALOG IN ANALOG IN ANALOG IN CONTINUOUS OPERATION CONTROLLER 1k Ω BIAS- MDIN MDOUT GND BENOUT BIASSET MODSET VBSET VMSET 3k Ω 1k Ω 1k Ω 1k Ω BCMON IMAX EN VREF BEN- BEN+ IN- IN+ CONTROL MAX3643 Typical Application Circuit 19-3848; Rev 1; 10/08 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE + Denotes a lead-free/RoHS-compliant package. * EP = Exposed paddle. Pin Configuration appears at end of data sheet. |
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