Plano, Texas-based Microtune has developed a monolithic silicon tuner that promises to cut RF costs by 25%, space by 25% and power by 40% compared to its previous generations. As a result, when integrated into subscriber premise equipment, the new MicroTuner MT2060 enables cable operators to deliver primary-line telephony that meets carrier-class levels of quality, service and reliability.

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Designed to operate with a 3.3 V supply, the high-density broadband tuner MT2060 is implemented in fifth-generation IBM silicon germanium (SiGe) process technology. Functions integrated on-chip include IF and low-noise amplifiers, IF filter, filter components and input controls. The MT2060 consumes only 1 W of power and features a software-selectable operating mode that dissipates a mere 800 milliWatts, the lowest power for a high-performance silicon tuner in the industry, claims Microtune.

“Cable telephony forms an integral part of cable operators' triple play of video, voice, and data services, and it is now poised to reach the majority of U.S. cable TV subscribers,” explained Mike Paxton, a senior analyst with technology research firm In-Stat/MDR. “Power is a critical issue for cable modems and other consumer access products that utilize VoIP for primary-line telephony service. A tuner that consumes only 1 W of power will be an important step forward for RF technology in VoIP cable products.”

Based on Microtune's patented dual-conversion tuner architecture, it delivers low phase noise, low noise figure and high linearity with controlled input impedance across the entire input band, low in-band emissions, and outstanding image rejection. It can receive frequencies in the 48 MHz to 860 MHz range. It also converts a selected channel to a standard IF between 30 MHz and 60 MHz. The MT2060's low close-in phase noise allows it to be used for both digital and analog signals including video, voice and high-speed data. Furthermore, single-ended RF input eliminates input balun. The product also offers low power modes using simple software commands.

It offers immunity to interference in cable networks with severe differences in signal strength across the input frequency band, ensuring quality signals across the entire system. To offer time-to-market advantage, the MT2060 interfaces directly to all standard demodulator chips, eliminating the need for customized products.

Housed in a miniature package, the MT2060 is sampling now, with initial production slated for the third quarter. To simplify evaluation and design, the manufacturer also offers an evaluation board and cable/telephony modem reference design.

For more information, visit www.microtune.com.