MAX3646ETG+T

The MAX3646ETG+T is a 155Mbps to 622Mbps SFF/SFP laser driver with extinction ratio control in 24 pin TQFN package. The MAX3646 is a +3.3V laser driver designed for multirate transceiver module with data rates from 155Mbps to 622Mbps. Lasers can be DC-coupled to the MAX3646 for reduced component count and ease of multirate operation. Laser extinction ratio control combines the features of automatic power control, 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. It accepts differential data input signals. External resistors set the required laser current levels. It provides transmit disable control (TX_DISABLE), single-point fault tolerance, bias-current monitoring and photocurrent monitoring.

• Power-supply current is 47mA
• Operating temperature range from -40°C to 85°C
• Modulation current is 85mA
• Bias current is 100mA
• Latched failure output (TX_FAULT) to indicate faults
• Compliant with the SFF-8472 transmitter diagnostic and SFP MSA timing requirements
• On-chip temperature compensation
• Self-biased inputs for AC-coupling
• Ground referenced current monitors
• Laser shutdown and alarm outputs

Notas

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party