Product category:
Communications ICs (Wired)
News Release from: Analog Devices | Subject: XFP transceiver chipset
Edited by the Electronicstalk Editorial
Team on 08 March 2005
Chipset simplifies XFP transceiver
design
Analog Devices has developed a new XFP (10Gbit/s small form factor pluggable) optical transceiver chipset and reference design.
Analog Devices has developed a new XFP (10Gbit/s small form factor pluggable) optical transceiver chipset and reference design XFP is rapidly becoming the leading standard for optical transceiver modules that connect to 10Gbit/s ports, such as those used in Ethernet, Fibre Channel and SONET/SDH protocol applications
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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XFP is protocol agnostic, uses less than one-third the power, and is one-third the size of an MSA (multisource agreement) transceiver with parallel interface.
It is also "hot pluggable", meaning the system does not have to be shut down prior to installation.
For the fast growing XFP optical transceiver market, ADI's chipset offers best-in-class jitter performance to ease interoperability challenges caused by using transceiver modules from different manufacturers in the same optical networking system, and the accompanying reference design enables reduced time-to-market.
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"ADI's XFP chipset reduces the risk for optical transceiver manufacturers who have fewer resources and less time to bring next-generation 10Gbit/s products to market", said Peter Real, Product Line Director for Analog Devices' Networking and Interface Products Group.
"The high performance of this chipset has the potential to speed the adoption of XFP by solving remaining technical and interoperability hurdles".
"The very clean jitter performance of the signal conditioner reduces the performance requirements of the transmit and receive ASICs that interface to the optical transceiver module".
For optical network engineers who must implement difficult 10Gbit/s transceiver designs, ADI's XFP chipset achieves optical eye margins of greater than 20% over temperature to Sonet specifications, has receive sensitivities of better than -19dBm, and offers a signal conditioner with best-in-class jitter performance that greatly exceeds XFP specifications and provides added margin to ease interoperability issues.
The accompanying reference kit, which includes an XFP optical transceiver, reduces time to market by enabling complete evaluation of the whole chipset.
ADI's XFP chipset includes the following analogue Devices' products designed to work seamlessly together.
The ADN2928 dual XFP signal conditioner retimes the signal in the module on both the transmit and receive paths.
The dual signal conditioner has unparalleled jitter performance with jitter generation of 6mUI RMS at OC-192, jitter tolerance of 0.6UI peak-peak at 10MHz for OC-192 and jitter transfer bandwidth of 2.0MHz, all exceeding XFP specifications.
Single transmit (ADN2827) and receive (ADN2826) versions will be available later this year, offering the same jitter performance in separate devices for easy customisation of the module layout.
On the receive path, the ADN2821 is a 3.3V, 10Gbit/s TIA (transimpedance amplifier) with only 1.1uA of total integrated noise, allowing receiver sensitivities of -19dBm to be achieved in a standard TO-46 can package.
The device supports PIN diodes, dissipates only 150mW of power and has a receive optical subassembly (ROSA) reference design that supports the XMD standard.
Two laser drivers support DFB (distributed feedback), FP (Fabry-Perot) and vertical-cavity side-emitting lasers (VCSELs).
The ADN2525 3.3V, 10Gbit/s active terminated differential LDD (laser diode driver) supports DFB and FP lasers, achieving optical eye margins of greater than 20% over temperature for Sonet and greater than 40% for Ethernet, with typical power consumption for the laser and the LDD of only 750mW.
The ADN2530 10Gbit/s active terminated differential VCSEL driver dissipates only 300mW for the laser and the LDD, and is pin-compatible with the ADN2525.
The active termination feature contained in both devices results in a superior match to transmission lines, and exceptional eye quality at very low power.
Use of analogue Devices' ADuC7020 precision analogue microcontroller allows the module's functionality to be programmed in software, and supports control of more complicated and higher performance modules.
On a single-chip, the microcontroller integrates a powerful 32bit RISC core with precision data conversion technology that supports up to eight channels of fast, 12bit analogue-to-digital conversion and up to four 12bit digital-to-analogue convertors.
The XFP optical transceiver reference design is available with the dual signal conditioner, TIA, microcontroller and choice of laser driver, for immediate evaluation of optical transceiver designs.
It includes a host board, I2C support, Gerber files, object and source code for the microcontroller, a graphical user interface and technical documentation.
The board's layout supports the XMD standard, allowing engineers to easily evaluate their own lasers.
The XFP reference design is available now.
Packaging information about the products in available on request.
The dual signal conditioner, TIA, microcontroller and choice of LDD chipset will sell for $50 in high volumes.
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