2.7Gbps, Low-Power SFP Laser Drivers
Multirate 3.3V Laser Driver for SFP Modules Meets All Requirements for SFF-8472 Digital Diagnostics
The MAX3735A is a +3.3V laser driver for SFP/SFF applications from 155Mbps up to 2.7Gbps. The device accepts differential input data and provides bias and modulation currents for driving a laser. DC-coupling to the laser allows for multirate applications and reduces the number of external components. The MAX3735A is fully compliant with the SFP MSA timing and the SFF-8472 transmit diagnostic requirements.
An automatic power-control (APC) feedback loop is incorporated to maintain a constant average optical power over temperature and lifetime. The wide modulation current range of 10mA to 60mA (up to 85mA AC-coupled) and bias current of 1mA to 100mA make this product ideal for driving FP/DFB laser diodes in fiber-optic modules. The resistor range for the laser current settings is optimized to interface with the DS1858 SFP controller IC.
The MAX3735A provides transmit-disable control, a single-point latched transmit-failure monitor output, photocurrent monitoring, and bias-current monitoring to indicate when the APC loop is unable to maintain the average optical power.
The MAX3735A is available in a 4mm x 4mm TQFN package and operates over the extended temperature range of -40°C to +85°C.
- Fully Compliant with SFP and SFF-8472 MSAs
- Programmable Modulation Current from 10mA to 60mA (DC-Coupled)
- Programmable Modulation Current from 10mA to 85mA (AC-Coupled)
- Programmable Bias Current from 1mA to 100mA
- Edge Transition Times <51ps
- 27mA (typ) Power-Supply Current
- Multirate 155Mbps to 2.7Gbps Operation
- Automatic Average Power Control
- On-Chip Pullup Resistor for TX_Disable
- 24-Pin 4mm x 4mm QFN package
- 1G/2G Fibre Channel SFF/SFP Optical Transceiver Modules
- Gigabit Ethernet SFF/SFP Transceiver Modules
- Multirate OC-3 to OC-48 FEC SFF/SFP Transceiver Modules
|Part Number||Target Oper. Range|
|MAX3735A||1 to 4.5||155||2700||3.3||27||CML||60||100|
MAX3735AEVKIT: Evaluation Kit for the MAX3735A
Technical DocumentsApp Note 3766 HFTA-12.0: Measuring Crosstalk Penalty in High-Speed Bidirectional Serial Communication Modules
App Note 3742 MAX3735A: Special Considerations When Interfacing the MAX3735A to the DS1859
App Note 3725 HFAN-02.6.0: Reducing Noise and Wander in Low-Speed (<622Mbps) Optical Transmitters
App Note 3427 Interfacing the DS1859 Digitally Controlled Resistors to the MAX3735 Laser Driver
App Note 3239 HFAN-02.5.0: Single-Ended vs Differential Methods of Driving a Laser Diode
App Note 3015 MAX3735A: MAX3735A Laser Driver Output Configurations, Part 4: Driving VCSELS
App Note 2930 HFAN-02.4.0: Over-Voltage Protection for SFP Laser Drivers [Application Brief]
App Note 2703 MAX3735A: Laser Driver Output Configurations, Part 3: Differential Drive
App Note 2111 MAX3735A: Laser Driver Output Configurations, Part 1: DC-Coupled Optimization Techniques
App Note 1747 MAX3735: Choosing the APC Loop Capacitors Used with MAX3735/MAX3735A SFP Module Designs
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|