MAX3766

Supply Voltage, V_CC, V_CCOUT..................................-0.5V to 7.0V
Voltage at IN+, IN-, ENABLE,
SAFETY, FAIL ...............................................-0.5V to (V_CC + 0.5V)
Voltage at MOD, BIASMAX, POWERSET, TC...............-0.5V to 4.0V
Current out of REF1, REF2 ...................................-0.1mA to 10mA
Current into OUT+, OUT- ......................................-5mA to 100mA
Current into BIAS..................................................-5mA to 130mA
Current into MD ........................................................-5mA to 5mA
Current into FAIL ....................................................-5mA to 30mA
Current into SAFETY................................................-5mA to 10mA
Continuous Power Dissipation (T_A = +85°C)
QSOP (derate 9.1mW/°C above +85°C).........................590mW
Operating Junction Temperature Range...........-40°C to +150°C
Processing Temperature (dice) .......................................+400°C
Storage Temperature Range ...........................-55°C to +150°C
Lead Temperature (soldering, 10sec) .............................+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.

The MAX3766 is a complete, easy-to-program laser driver for fiber optic LAN transmitters, optimized for operation at 622Mbps. It includes a laser modulator, automatic power control (APC), and a failure indicator with latched shutdown.

Laser modulation current of MAX3766 can be programmed up to 60mA at 622Mbps. A programmable modulation temperature coefficient can be used to keep the transmitted extinction ratio nearly constant over a wide temperature range. The modulator operates at data rates up to 1.25Gbps at reduced modulation current. APC circuitry uses feedback from the laser's monitor photodiode to adjust the laser bias current, producing constant output power regardless of laser temperature or age. The MAX3766 supports laser bias currents up to 80mA.

The MAX3766 provides extensive laser safety features, including a failure indicator with latched shutdown and a smooth start-up bias generator. These features help ensure that the transmitter output does not reach hazardous levels. The MAX3766 is available in a compact 20-pin QSOP and dice.