The MAX3799ETJ+T is a 1Gbps to 14Gbps, SFP+ multirate limiting amplifier and VCSEL driver in 32 pin TQFN package. It is a highly integrated limiting amplifier and VCSEL driver that operates up to 14Gbps. By providing a selectable data path with a noise-shaping filter, the MAX3799 enables a module with 10G optics to be fully compliant with both 1000BASE-SR and 10GBASE-SR specifications. This low-power integrated limiting amplifier and VCSEL driver IC enables a platform design for SFP MSA as well as for SFP+ MSA-based optical transceivers. It limits the differential input signal generated by a transimpedance amplifier into a CML-level differential output signal. The compact VCSEL driver provides a modulation and a bias current for a VCSEL diode. The optical average power is controlled by an APC loop implemented by a controller that interfaces to VCSEL driver through a 3-wire digital interface. All differential I/Os are optimally back terminated for a 50 ohm transmission line PCB design.
Supply voltage range is 2.85V to 3.63V
Operating temperature range from -40°C to 85°C
Optical sensitivity of -21.5dBm at 1.25Gbps using a 10.32Gbps ROSA (-19.7dBm OMA)
Low power dissipation of 320mW at 3.3V power supply
3mVP-P receiver sensitivity at 10.32Gbps
4psP-P DJ at receiver output at 8.5Gbps 8B/10B
3-wire digital interface
26ps rise and fall time at Rx/Tx output
LOS threshold, LOS squelch, LOS polarity, CML output level, signal path polarity and de-emphasis
Modulation current, bias current, polarity and eye safety control
(EN)
