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ADI rolls chips for optical-fiber comms

Posted: 11 Apr 2003 ?? ?Print Version ?Bookmark and Share

Keywords:Analog devices? adn2812? cdr device? clock data recovery? adn2849?

Analog Devices Inc. came to the Optical Fiber Communication conference with a new clock/data recovery (CDR) chip and a pair of 10.7Gbps external modulator drivers for continuous-wave lasers.

The ADN2812 continuous-tuning CDR device, priced at $54 each in 1,000-piece quantities, is said to accommodate current and future bit rate requirements for multiservice provisioning platforms.

The data rate "read- back" feature lets the part lock on to any incoming data rate between 10Mbps and 2.7Gbps without the need for an external reference clock, while providing the acquired data rate frequency through the I?C port.

The device targets protocol- and data rate-agnostic equipment that operates over Ethernet and SONET/SDH OC-1, 3, 12, 48, and associated FEC rates, and can also benefit wave-division multiplexing transponders, test equipment, backplanes, regenerators/repeaters, broadband cross-connects and routers, the company said.

The external modulator drivers for continuous-wave lasers are called the ADN2849 and ADN2859. The ADN2849 provides a 3V single-ended output to drive an electro-absorption modulator and the ADN2859 provides a 6Vpp differential output to drive a differential Mach-Zehnder modulator. Both dissipate 900mW (2V swing, 1V offset), which the company said is typically one-third less than other solutions. Each is available as a 4-by-4mm LFCSP package or as bare die. The packaged units are each priced at $107 in quantities of 1,000.

The ADN2812 CDR device is now sampling. The drivers will be available in sample quantities in Q3.

EE Times

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