Multirate Laser Driver with Extinction Ratio Control
Multirate Laser Driver with Extinction-Ratio Control Designed for Multirate Transceiver Modules with Data Rates from 155Mbps to 2.7Gbps
DescriptionThe 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 compensation, and built-in thermal compensation. The APC loop maintains constant average optical power. Modulation compensation increases the modulation current in proportion 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) modulation 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-current 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.
- 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
- 1Gbps/2Gbps Fibre Channel SFF/SFP and GBIC Transceivers
- Gigabit Ethernet SFF/SFP and GBIC Transceivers
- Multirate OC-3 to OC-48 FEC Transceivers
|Part Number||Target Oper. Range|
|MAX3737||1 to 4.5||155||2700||3.3||47||CML||85||100|
MAX3737EVKIT: Evaluation Kit for the MAX3737
Technical DocumentsApp 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 2111 MAX3735A: Laser Driver Output Configurations, Part 1: DC-Coupled Optimization Techniques
App Note 1119 HFAN-02.2.1: Maintaining the Extinction Ratio of Optical Transmitters Using K-Factor Control
Tools & Models
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|