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
· 16-Pin TSSOP-EP Package AvailableApplication· Gigabit Ethernet Optical Transmitter
· Fibre Channel Optical Transmitter
· ATM LAN Optical TransmitterPinout
SpecificationsSupply 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°C)
32-Pin TQFP (derate 14.3mW/°C) ..................................1100mW
16-Pin TSSOP (derate 27mW/°C)....................................2162mW
Operating Temperature Range................................0°C to +70°C
Operating Junction Temperature Range ...............0°C to +150°C
Processing Temperature (die) ..........................................+400°C
Storage Temperature Range .............................-55°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe MAX3297 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 MAX3297 series (MAX3286/MAX3287/MAX3288/ MAX3289) is optimized for operation at 1.25Gbps, and the MAX3296 series (MAX3296/MAX3297/MAX3298/MAX3299) 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 monitor. The safety circuit detects faults that could cause dangerous light output levels. A programmable power-on reset pulse initializes the laser driver at start-up.
The MAX3286/MAX3296 are available in a compact, 5mm x 5mm, 32-pin TQFP package or in die form. The MAX3287/MAX3288/MAX3289 and MAX3297/MAX3298/ MAX3299 are available in smaller 16-pin TSSOP-EP packages, which are ideal for small form-factor optical modules.
MAX3297 Data Sheet
