Analog Devices Adds an IC

NORWOOD, Mass. -- Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal processing applications, today announced at the Fiberoptics Forum 2001 in Tokyo, Japan, the industry's most cost-effective integrated solution for optical power measurement, useful across a wide range of optical networking applications. The single-chip AD8304 logarithmic converter directly interfaces to fiber optic photodiodes and can be easily designed into optical amplifiers, optical switches, and transmit laser modules. The AD8304 logarithmic converter delivers very high performance-160 dB dynamic range and 0.1 dB accuracy-while overcoming the expense associated with hybrids and the calibration complexities associated with switched-gain TIA (trans impedance amplifier) solutions. The result is an exceptionally flexible, easy to use, and cost- effective IC solution. "The AD8304 improves optical system performance by offering greater precision and dynamic range than alternative solutions," said Jay Cormier, product line director, RF Standard Products Group , Analog Devices . "By leveraging Analog Devices' proprietary, industry-leading logarithmic amplifier technology, we were able to offer a flexible IC solution with very precise power measurement capability that can be used throughout the optical network to address all the possible system variations." In a separate release:Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal processing applications, today announced at the Fiberoptics Forum 2001 in Tokyo, Japan, two new products in its portfolio of optical networking laser diode drivers, extending dual-loop capability to 3.3-volt applications. These "anyrate" LDDs support data rates from 50 megabits per second (Mbps) to 3.3 gigabits per second (Gbps). With ADI's dual-loop capability, manufacturers can use less expensive optics because the LDD compensates for variations that occur in laser diodes over time and temperature changes. Operating at reduced supply voltages, the new ADN2847 and ADN2848 offer laser module designers a low cost solution for delivering consistent optical performance over a wide range of temperatures and operating conditions. Applications include SONET OC-3/12/48, SDH STM-1/4/16, Fiber Channel and Gigabit Ethernet modules. "Closed-loop control of laser diode average-power and extinction ratio maintains optimal laser diode performance in a variety of conditions and reduces time spent tuning diodes during assembly," said Peter Real, product line director, High Speed Networking Group, Analog Devices. "Our unique dual- loop architecture enables the long-term laser diode stability and reliability our customers need to reduce costs and time- to- market." Analog Devices Inc.