6 March 2012

GigOptix ships production quad TIA receiver arrays for 40G QSFP+ long-reach module

GigOptix Inc of San Jose, CA, USA (which supplies semiconductor and optical components for high-speed information streaming) has started volume production and shipments of its HXR5104B quad transimpedance amplifier (TIA) receiver array for long-reach 40Gbps QSFP+ applications to Kaiam Corp of Newark, CA, a private firm commercializing photonic integrated circuits (PICs).

The HXR5104B quad TIA is designed to be fully compliant with the IEEE 40GBASE-LR4 standard, meeting the exacting receiver sensitivity and stressed eye requirements in addition to the 40Gbps QSFP+ form factor requirements. GigOptix says that the solution is ultra-low power, consuming less than 75mW per channel while fully implementing the receive function of a 10km 40Gbps link.

The quad-channel integrated design includes four high-sensitivity 10Gbps TIAs, and an industry-standard 2-wire digital interface to enable full control of the device. The design minimizes the number of components required to implement the 40Gbps receiver, resulting in a lower cost and smaller form factor, says the firm. The HXR5104B further incorporates received signal strength indicator (RSSI)-based signal detect, among other features, while the programmable pre-emphasis circuitry facilitates optimal performance over various trace lengths.

“The HXR5104B was designed to provide a solution for the challenging 40GBASE-LR4 requirements leveraging GigOptix’s deep expertise in implementing parallel-channel high-speed low-power solutions,” says the HXR5104B’s designer Martin Bossard, GigOptix’s director of HX Product Line Engineering & general manager for GigOptix-Helix AG. The quad TIA provides not only a receiver amplifier with high sensitivity but also low cross coupling between channels, enabling it to pass the exacting stressed eye sensitivity requirements of the 40GBASE-LR4 specification in a low power solution, he adds. In its recent report on Optical Components, market research firm Ovum forecasted that the 40G QSFP+ LR4 market would rise at a compounded annual growth rate (CAGR) of 111% from 17,000 units in 2012 to over 350,000 units in 2016.

Kaiam’s QSFP-LR4 transmit optical sub-assemblies (TOSAs) and receiver optical sub-assemblies (ROSAs) enable high-density 40Gbps links over single-mode fiber for 10km links. At a quarter of the size of 40Gbps CFP modules, the QSFP suits high-growth data-center, routing and switching applications.

The performance of the HXR5104B allows an unparalleled combination of high sensitivity with minimal cross-talk, comments Kaiam’s VP of technology development John Heanue. “The HXR5104’s versatility enables custom configurations that can further optimize the performance of the link,” he adds.

GigOptix says that the HXR5104B is available with photodiodes on an evaluation board.

Tags: GigOptix Quad TIA receiver

Visit: www.kaiamcorp.com

Visit: www.gigoptix.com