Maxim MAX3646ETG

激光二极管驱动器（光纤）622Mbps2.97V ~ 3.63V

Overview

The MAX3646ETG is a +3.3V laser driver designed for multirate transceiver modules with data rates from 155Mbps to 622Mbps. Lasers can be DC-coupled to the MAX3646ETG 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 MAX3646ETG 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, make the MAX3646ETG ideal for driving FP/DFB lasers in fiber optic modules. External resistors set the required laser current levels. The MAX3646ETG provides transmit disable control (TX_DISABLE), single-point fault tolerance, bias-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 MAX3646ETG is compliant with the SFF-8472 transmitter diagnostic and SFP MSA timing requirements. The MAX3646ETG is offered in a 4mm x 4mm, 24-pin thin QFN package and operates over the extended -40°C to +85°C temperature range.

Features

Tray Package
Supplied in the 24-WFQFN Exposed Pad package
Operating temperature of -40°C~85°C
Operating supply current of 47mA
Operating supply voltage of 3.3V

Surface Mount Mounting Type

Applications

There are a lot of Maxim Integrated
MAX3646ETG+ Laser Driver ICs applications.

• Home electric appliance
• Battery-powered device
• Communication device
• Personal communication device
• Portable telephone
• Electronic notebook
• Camera
• Video equipment
• CPU power supply
• Switching regulator