MAX3286

Features:

7ps Deterministic Jitter (MAX3296) 22ps Deterministic Jitter (MAX3286)
+3.0V to +5.5V Supply Voltage
Selectable Laser Pinning (Common Cathode or Common Anode) (MAX3286/MAX3296)
30mA Laser Modulation Current
Temperature Compensation of Modulation Current
Automatic Laser Power Control or Constant Bias Current
Integrated Safety Circuits
Power-On Reset Signal
QFN and Thin QFN Packages Available


Application

Gigabit Ethernet Optical Transmitter
Fibre Channel Optical Transmitter
ATM LAN Optical Transmitter


Pinout




Specifications

Supply Voltage at VCC ..........................................-0.5V to +7.0V
Voltage at EN, EN, PORDLY, FLTDLY, LV, IN+, IN-,
REF, POL, POL, MD, MON, BIASDRV,
MODSET, TC..................................................-0.5V to (VCC + 0.5V)
Voltage at OUT+, OUT-............................(VCC - 2V) to (VCC + 2V)
Current into FAULT, FAULT, POR, SHDNDRV............-1mA to +25mA
Current into OUT+, OUT- ......................................................60mA
Continuous Power Dissipation (TA = +70)
32-Pin TQFP (derate 14.3mW/°C above +70)................1100mW
28-Pin QFN and 28-Pin Thin QFN
(derate 28.7mW/ above +70).....................................2300mW
16-Pin TSSOP (derate 27mW/ above +70) .................2162mW
Operating Temperature Range....................................0°C to +70
Operating Junction Temperature Range ....................0 to +150
Processing Temperature (die) ..............................................+400
Storage Temperature Range ..................................-55 to +150
Lead Temperature (soldering, 10s) ......................................+300 


Description

The MAX3286/MAX3296 series of products are highspeed laser drivers for fiber optic LAN transmitters optimized for Gigabit Ethernet applications. Each device contains a bias generator, laser modulator, and comprehensive safety features. Automatic power control (APC) adjusts the laser bias current to maintain average optical power at a constant level, regardless of changes in temperature or laser properties. For lasers without a monitor photodiode, these products offer a constant-current mode. The circuit can be configured for use with conventional shortwave (780nm to 850nm) or longwave (1300nm) laser diodes, as well as verticalcavity surface-emitting lasers (VCSELs).

The MAX3286 series (MAX3286MAX3289) is optimized for operation at 1.25Gbps, and the MAX3296 series (MAX3296MAX3299) is optimized for 2.5Gbps operation. Each device can switch 30mA of laser modulation current at the specified data rate. Adjustable temperature compensation is provided to keep the optical extinction ratio within specifications over the operating temperature range. This series of devices is optimized to drive lasers packaged in low-cost TO-46 headers. Deterministic jitter (DJ) for the MAX3286 is typically 22ps, allowing a 72% margin to Gigabit Ethernet DJ specifications.

These laser drivers provide extensive safety features to guarantee single-point fault tolerance. Safety features include dual enable inputs, dual shutdown circuits, and a laser-power monitor. The safety circuit detects faults that could cause dangerous light output levels. A programmable power-on reset pulse initializes the laser driver at startup.

The MAX3286/MAX3296 are available in a compact, 5mm * 5mm, 28-pin QFN or thin QFN package; a 5mm ✕ 5mm, 32-pin TQFP package; or in die form. The MAX3287/MAX3288/MAX3289 and MAX3297/MAX3298/MAX3299 are available in a 16-pin TSSOP-EP package.