Norwood, Mass. - Analog Devices Inc. has added three chips to its optical-network product line: the ADN8810 programmable current source, for tunable lasers; ADN2820 transimpedance amp, for OC-192 and 10-Gbit Ethernet metro/access; and AD8305 logarithmic converter, for fiber-optic supervisory systems.
Peter Real, product-line director for Analog Devices' High Speed Networking Group, said the ADN8810, which provides sources and other control signals needed for tunable-laser devices, is one of the first single-chip programmable precision current sources available for tunable lasers in optical networks and instrument applications. The chip can scale its output current for laser front mirror, back mirror and gain while interfacing to the host system over a serial interface. It is sampling now at $8 in lots of 1,000. Production is planned for January.
The ADN2820 transimpedance amp, priced at $90 in lots of 1,000, features high gain, low input noise and functionality typically found in postamplifier ICs, Real said. The 10-Gbit/second device can drive a clock-and-data recovery IC or transceiver, eliminating the need for an external postamplifier in short- and intermediate-reach optical modules.
The AD8305 logarithmic converter, which sells for $7.81 in 1,000-unit quantities, is designed for optical-power measurement in op amps, add/drop multiplexers, tunable lasers and other optical-networking products.
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