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Zarlink tuner design to reduce time-to-market

Posted: 10 Jul 2003 ?? ?Print Version ?Bookmark and Share

Keywords:zarlink semiconductor? zle10565 reference design? sl2150d? sl2101? zl10100?

Zarlink Semiconductor has unveiled a production-ready blueprint for a tuner subsystem that is suitable for use in digital cable personal video recorders (PVRs). Based on seven of the company's RF chips, the ZLE10565 Reference Design is the first in a family of off-the-shelf designs.

To lower PVR costs and improve time-to-market, consumer electronics companies want "fit and forget"tuners that reduce the need for time-consuming in-house RF design work. With the reference design for a two-channel PVR tuner, manufacturers can quickly produce a compact cable PVR with reliable channel reception.

The SL2150D power splitter chip included in the design has a built-in RF AGC that handles the front-end splitter/amplifier function. The chip requires no discrete input RF band splitting, which reduces RF complexity and eases manufacture. The double-conversion up/down tuners each utilize the company's SL2101 broadband up-converter and ZL10100 down-converter. The SL2009 IF amplifier executes the final amplification stages. The design also has a 5V to 30V converter circuit for simple, 5V-only operation.

The reference design supports an operating range of 50MHz to 860MHz, and achieves differential and single-ended gain ratings of 81.5dB and 76dB, respectively.





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