ICs address optical network design challenges

A new range of transmit/receive and monitoring/control IC solutions provide important design alternatives for the development of components and modules for optical network systems.

Analog Devices has developed a new range of transmit/receive and monitoring/control IC solutions that provide important design alternatives for the development of components and modules for optical network systems.

The new ICs will be demonstrated next week at OFC 2003 in Atlanta, Georgia.

"Analog Devices has underscored its commitment to the optical networking OEMs with a host of new signal processing IC solutions", said Peter Real, Product Line Director, High Speed Networking Group, Analog Devices.

"We strive to deliver innovative and high-performance technology that helps solve our customers' engineering challenges.

These new ICs increase performance and integration while reducing space and power requirements, to meet the challenges of advanced fibre-optic network design".

The new ICs include the ADN2812 and ADN2849/59 for transmit and receive applications and the ADN8820, ADN2860 and ADL5306 for monitoring and control applications.

The ADN2812 is a continuous tuning clock and data recovery IC for multiservice provisioning platforms that can be designed into equipment today and accommodate bit rate requirements in the future.

Featuring the exclusive datarate readback feature, it can lock onto any incoming data rate between 10Mbit/s and 2.7Gbit/s without the need for an external reference clock while providing the acquired datarate frequency through the I2C port.

The ADN2812 is ideal for next generation protocol and datarate-agnostic equipment that operate over Ethernet and Sonet/SDH OC-1/3/12/48 and all associated FEC rates.

The ADN2812 also is appropriate for MSPPs, WDM transponders, test equipment, backplanes, regenerators/repeaters, broadband cross-connects and routers.

The ADN2849 and ADN2859 are the only 10.7Gbit/s external modulator drivers for continuous wave (CW) lasers that address the small size, low power, integration and performance requirements for higher density systems.

The ADN2849 provides a 3V single-ended output to drive an electro-absorption modulator.

The ADN2859 provides a 6V peak-to-peak differential output to drive a differential Mach-Zehnder modulator.

Both IC drivers feature a power dissipation of 900mW (2V swing, 1V offset), which is typically one-third less than other solutions.

Both devices are available in 4 x 4mm LFCSP packages and as bare die.

The ADN8820 is the first fully integrated single chip continuous wave (CW) laser controller for optical transmitters, transceivers, transponders and pump laser control in EDFA and Raman amplifiers.

The new controller improves CW laser accuracy by offering a complete control loop solution enabled by its proprietary high-speed, high-efficiency and low-noise switch mode output stage.

Available in a single 7 x 7mm LFCSP IC, the ADN8820 also simplifies designs by reducing component counts and costs.

The ADN2860 is a three-channel nonvolatile digital potentiometer that provides the lowest drift available on a multichannel potentiometer with an I2C interface.

Designed for laser modules used in transmitter and transceiver applications, the IC's low drift (30ppm/C) allows more accurate control loops with low temperature drift.

The ADL5306 60dB logarithmic converter is a single IC that will measure optical power signal levels in a variety of fibre optic network elements including transceiver modules, add/drop multiplexers and tunable lasers.

With a linear response accurate to 0.1dB, its 60dB range is sufficient for less demanding requirements and offers a price-competitive alternative to less accurate transimpedance amplifier measurement approaches.

The ADN2812, ADN2860 and ADL5306 are currently sampling.

The ADN8820 and ADN2849/59 will be sampling in Q3 2003.

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