Maxim MAX3738ETG+T

Драйвер лазерного диода (оптоволокно)4,25 Гбит/с2,97 В ~ 3,63 В

Overview

The MAX3738ETG+TGD0 is a +3.3V laser driver designed for multirate transceiver modules with data rates from 1Gbps to 4.25Gbps. Lasers can be DC-coupled to the MAX3738ETG+TGD0 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 MAX3738ETG+TGD0 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 MAX3738ETG+TGD0 ideal for driving FP/DFB lasers in fiber optic modules. External resistors set the required laser current levels. The MAX3738ETG+TGD0 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 MAX3738ETG+TGD0 is compliant with the SFF-8472 transmitter diagnostic and SFP MSA timing requirements. The MAX3738ETG+TGD0 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

Applications

• CPU power supply
• Switching regulator
• Multiple-power supply system
• Digital audio player
• Digital TV
• Smartcard
• Industrial equipment
• DVD and CD-ROM drive
• Quick charge protocols
• Measurement and control euipment