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TVs benefit from low-power tuner

Posted: 27 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:zarlink semiconductor? zl0037? satellite tuner? zl10313? satellite demodulator?

Zarlink Semiconductor introduced the ZL0037 satellite tuner for SD (standard definition) and HD (high definition) digital satellite television receivers used in PayTV systems.

The ZL10037 direct conversion tuner, coupled with the ZL10313 satellite demodulator, offers a high-performance, low-power solution for QPSK (quadrature phase shift keying) satellite receivers. The ZL10037 tuner also delivers HD-compliant performance when used with an 8-PSK demodulator.

The ZL10037 device provides good immunity to strong adjacent channel signals. The single-chip direct conversion tuner may be used in 1 to 45MSymbols/s DVB-S (Digital Video Broadcast- Satellite), DSS (Digital Satellite System) and 8PSK receiver systems. The 8PSK capability also addresses DVB-S2 broadcast-mode only systems.

A "power and forget" VCO eliminates the need for the time-consuming VCO calibration required by most competing products, and an integrated RF loop-through minimizes external component count and cost. The ZL10037 tuner consumes only 500mW, with further power savings achieved via programmable power optimization settings.

The ZLE10542 reference design, targeted primarily at PayTV QPSK satellite receiver systems, is a complete front-end solution that combines the ZL10037 tuner with the ZL10313 demodulator. A key feature is high-speed "blind scan," where an on-chip hard-wired controller enables the demodulator to achieve ultra-fast channel scanning capability with little intervention from an external processor. The demodulator provides strong performance across the entire satellite 1 to 45MSymbols/s DVB-S symbol rate range.

The ZLE10542 two-chip RF subsystem consumes less than 1W of power in full operation. An integrated sleep pin reduces power consumption 1,000-fold in stand-by mode.

The ZL10037 tuner is in full production and is supplied in a 28-pin 5-by-5mm QFN (quad-flat-no lead) package. The ZLE10542 reference design is already available.

- Janine Love


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