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Zero-IF tuner aims at China's UHF-band apps

Posted: 11 Mar 2008 ?? ?Print Version ?Bookmark and Share

Keywords:zero-IF (ZIF) tuner? UHF-band MMDS?


Maxim Integrated Products has introduced the MAX2117 zero-IF (ZIF) tuner for UHF-band MMDS applications.

This device receives QPSK signals in the 470-1,000MHz range and downconverts them to baseband for demodulation. Specifically designed for China's UHF-band MMDS systems, the MAX2117 is compatible with most DVB-S demodulators. A low 8dB (typ) noise figure, combined with a better than 25dB (typ) adjacent-channel protection ratio (ACPR), makes this device ideal for MMDS applications.

The MAX2117 operates from a single, 3.3V 5 percent supply and consumes only 330mW. Though it has been designed to operate with a low-cost 4MHz crystal, an internal reference divider allows the user to select any crystal in the 4MHz to 8MHz range.

Fully specified over the 0C to 70C commercial temperature range, the MAX2117 is available in a small, 5mm x 5mm, 28-pin TQFN package. Prices start at $5 (1,000-up). An evaluation kit is available to speed designs.

Maxim is one of the exhibitors in the IIC-China 2008.

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