Silicon germanium linear transimpedance amplifier for 40G DWDM optical receivers

The GX3122B dual channel linear transimpedance amplifier (TIA) is designed for use in 40Gb/s DWDM coherent optical receivers. Consisting of two balanced linear TIAs integrated on a single silicon germanium die, the device amplifies weak signals received from photodiodes to drive ADCs and DSPs in a coherent optical system. It provides excellent signal fidelity via low total harmonic distortion (THD) over a large dynamic range and efficiently handles high AC and DC currents in coherent receivers.

Key features include:

• Highly integrated solution with dual channel TIAs to reduce system complexity and cost
• Increased differential gain of 5K Ohm
• Increased linear gain over 30dB of dynamic range
• Less than 5% THD
• Automatic or manual gain control options
• Peak detection function
• Low power consumption
• Input power monitor

For more information and sample orders, contact GigOptix