GigOptix introduces linear TIA for 40G coherent receivers

GigOptix Inc. has announced its GX3122 dual-channel linear Transimpedance Amplifier (TIA) designed for use in next-generation 40Gb/s DWDM coherent optical receivers.

MARCH 4, 2010 -- GigOptix Inc. has announced its GX3122 dual-channel linear Transimpedance Amplifier (TIA) designed for use in next-generation 40Gb/s DWDM coherent optical receivers.

The GX3122 key features include:
• Two balanced TIA channels in one device to reduce system complexity and cost
• Linear gain over 20dB of dynamic range
• Less than 5% total harmonic distortion (THD)
• Automatic or manual gain control options
• Peak detection function
• Low power consumption
• Receive Strength Signal Indicator
• Form factor compatibility with GigOptix’s 100G dual channel linear TIA solution

The GX3122 TIA consists of two balanced linear 10G TIAs in a single die. The device forms the gain interface between the photodiodes and the Analog to Digital Converters (ADC) and Digital Signal Processor (DSP) in a coherent optical receiver. The GX3122 is designed to have the required large dynamic range and handle the high AC and DC currents with a consistently low THD.
“The GX3122 further expands our TIA portfolio by providing a dedicated solution for the emerging 40G coherent market,” comments Julie Tipton, vice president marketing at GigOptix. “The GX3122 is form factor compatible with GigOptix’s 100G DP-QPSK dual channel TIA and this is a major benefit for our customers. It means that receivers designed using our 100G dual channel linear TIA solution for 100G DP-QPSK can now be easily retargeted to 40G DP-QPSK operation using our lower cost GX3122. Similarly, customers who implement a design with our GX3122 can now move more rapidly to a 100G receiver design using our 100G TIA solution. This is a big win for customers who are resourced constrained and are looking to leverage existing engineering designs into new markets.”

40G coherent systems are seen as being a significant segment in future 40G DWDM networks due to the format’s capability for long-haul reach, its high tolerance to signal distortions, and its expected OPEX savings over other 40G formats.

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