Low-Power, Compact, Multirate Limiting Amplifier for SFF/SFP Applications
SUNNYVALE, CA-August 13, 2004-Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX3746 3.3V, low-power, multirate limiting amplifier with a programmable loss-of-signal indicator. The MAX3744 transimpedance amplifier (TIA), the MAX3746 limiting amplifier, and the MAX3735A/MAX3740A laser drivers form a 3-chip solution for SFP digital diagnostic modules. The MAX3746 limiting amplifier is available in a compact, 3mm x 3mm, 16-pin QFN package, and is pin compatible to the MAX3748A.
The MAX3746 is designed for 622Mbps to 3.2Gbps SFF-8472-compatible receiver modules. When DC-coupled to the MAX3744 TIA, the MAX3746 limiting amplifier can provide a receive-power-monitoring signal (RSSI) for digital diagnostic applications. This allows the implementation of digital diagnostics while allowing the TIA to be packaged in a low-cost, 4-pin TO-46 header. Consuming only 66mW of power, the MAX3746 is ideal for SFP-based DWDM modules.
Operating from a single 3.3V supply, the MAX3746 has better than 2mV input sensitivity and 150 microvolts root-mean-square input-referred noise. It has a programmable signal-detect function that can be set to different assert and deassert levels while maintaining a 2dB of hysterisis. The MAX3746 features low 8.5ps of deterministic jitter and 3ps root-mean-square of random jitter. It can accept input voltages from 2mV to 1200mV and provides a 800mV output (typ).
The MAX3746 operates over the extended temperature range (-40 degrees Celsius to +85 degrees Celsius). Prices start at $4.75 (1000-up, FOB USA). An evaluation kit is available to speed designs.
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