MAX3656 Datasheet | Maxim Integrated

Description The MAX3656 is a burst-mode laser driver that operates at data rates from 155Mbps up to 2.5Gbps. The laser driver accepts either positive-referenced emittercoupled logic (PECL) or current-mode logic (CML) data inputs and provides bias and modulation current for the laser diode. The device can switch the laser diode from a pletely dark (off) condition to a full (on) condition (with proper bias and modulation currents) in less than 2ns. The MAX3656 incorporates DC-coupling between laser driver and laser diode and operates with a singlesupply voltage as low as +3.0V. A digital automatic power-control (APC) loop is provided to maintain the average optical power over the full temperature range and lifetime. The APC loop is functional for a minimum burst on-time of 576ns and minimum burst off-time of 96ns, with no limit on the maximum burst on- or off-time. A fail monitor is provided to indicate when the APC loop can no longer maintain the average power. The MAX3656 can be configured for nonburst-mode applications (continuous mode) by connecting burst enable (BEN) high. For power saving, the MAX3656 provides enabling and disabling functionality. The modulation current can be set from 10m A to 85m A and the bias current can be set from 1m A to 70m A. The MAX3656 is packaged in a small, 24-pin, 4mm ✕ 4mm thin QFN package and consumes only 132m W (typ), excluding bias and modulation currents. o o o o o o o o o o Features Multirate Operation from 155Mbps to 2.5Gbps Burst Enable/Disable Delay <2ns Burst On-Time of 576ns to Infinity Infinite Bias-Current Hold Time Between Bursts DC-Coupled Operation with Single +3.3V Power Supply 40m A Typical Supply Current Programmable Bias Current from 1m A to 70m A Programmable Modulation Current from 10m A to 85m A Automatic Average Power Control with Failure Monitor (No CAPC Capacitor Needed) APC Loop Initialization ≤3 Bursts Ordering Information PART MAX3656E/D MAX3656ETG TEMP RANGE - PIN-PACKAGE Dice- PKG CODE - T2444-1 -...