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Satellite TV tuner needs no external LNA

Posted: 12 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:satellite TV? TV tuner? external LNA?


Maxim Integrated Products has introduced the MAX2112 low-cost, zero-IF, direct-conversion tuner for satellite TV. This tuner receives QPSK and 8PSK signals in the 925MHz to 2175MHz range, and downconverts them to baseband for demodulation. To reduce total solution size and cost, it provides an 8.0dB noise figure and a -75dBm to 0dBm dynamic range, thus eliminating the need for an external LNA. Additionally, its VCO autotuner function simplifies firmware for ease of use. The MAX2112 is suitable for DVB-S2 and free-to-air applications in which low cost and ease of use are key requirements.

The MAX2112 operates from a single 3.3V supply, consumes only 300mW, and is designed for use with a 27MHz crystal. The MAX2112 is packaged in a 5mm x 5mm, 28-pin TQFN and is available in both the commercial (0 to 70C) and extended industrial temperature (-40C to 85C) ranges. Prices start at $4.50 (1,000-up, FOB USA). Evaluation kits and reference designs are available to speed designs.

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