LOW-COST 155Mbps LASER DRIVER WITH EXTINCTION RATIO CONTROL
SUNNYVALE, CA-February 23, 2004-Maxim Integrated Products
(NASDAQ: MXIM) introduces the MAX3646 multirate laser driver with extinction ratio control (ERC). This device operates at up to 622Mbps and can be AC- or DC-coupled to the laser diode for use in OC-3, OC-12, and Fast Ethernet transceiver modules. The MAX3645 limiting amplifier, the MAX3657 transimpendance amplifier, and the MAX3646 laser driver form a low-cost, high-performance chipset for 125Mbps and 155Mbps optical transceivers.
The MAX3646 includes automatic power control (APC) and modulation compensation. These features, with on-chip thermal compensation, allow the module to maintain a constant extinction ratio over lifetime and temperature. This device meets all requirements for SFP modules with SFF-8472 Digital Diagnostics.
Operating from a single 3.3V supply, the MAX3646 has a programmable bias current range of 1mA to 100mA and a modulation current range up to 85mA when coupled. The driver has self-biasing data inputs and consumes only 155mW of power. The MAX3646 has edge-speed transition times of only 100ps. It generates only 45ps of deterministic jitter and 1.1ps of random jitter.
The MAX3646 is available in a 4mm x 4mm 24-pin QFN package and operates over the extended temperature range (-40°C to +85°C). Prices start at $2.25 (1000-up, FOB USA). An evaluation kit is available to speed designs.
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