2.7 Gbps fiber-optic laser driver in a 5x5 QFN
The MAX3863EGJ from Analog Devices is a single-channel laser diode driver designed for fiber-optic transmitters operating at data rates up to 2.7 Gbps. It delivers a bias current of 100 mA and a modulation current of 80 mA, both of which set the optical output power and extinction ratio in the laser module.
Housed in a 32-VFQFN exposed-pad package (5x5 mm body per the supplier device package designation), the MAX3863EGJ is a surface-mount part intended for reflow soldering. The 3.3 V supply rail is the only voltage needed; no negative bias generator is required on the board for this driver. Decoupling capacitors close to the supply pins are standard practice for maintaining signal integrity at 2.7 Gbps edge rates.
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Note that this part is listed as RoHS non-compliant, which may affect its use in markets with strict RoHS enforcement or in new designs targeting RoHS conformance.