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Zarlink RF tuner replaces double-conversion tuners

Posted: 16 Aug 2002 ?? ?Print Version ?Bookmark and Share

Keywords:zarlink semiconductor? sl2610? rf silicon tuner? stb tuner ic? single conversion tuner?

The SL2610 RF silicon tuner IC from Zarlink Semiconductor Inc. is claimed to be the first tuner chip that allows compact, single-conversion tuner designs to achieve the same level of performance as double-conversion tuners, and is eyed towards integration into both analog and digital terrestrial STBs.

The 6mm2 MLPFP device convert analog and digital terrestrial TV signals into pictures using a single frequency conversion step and features an on-chip image channel reject to eliminate unwanted "image channels." The circuit delivers >30dB of image suppression.

The SL2610 also delivers high-performance intermodulation intercept, enabling the device to efficiently tune to the desired channel in the presence of higher amplitude interferers or wide-bandwidth composite input signals.

The tuner is essentially a triple-band, low-noise RF mixer oscillator (MO) that operates in the 50MHz to 900MHz frequency range. Each MO band consists of a low-noise preamplifier/mixer and local oscillator, supported by an external, varactor-tuned tank. The MO outputs share a low-impedance surface acoustic wave filter driver stage.

It also integrates an I2C bus-controlled PLL synthesizer designed for low phase-noise performance and compatible with all common frequency offset requirements. At 10kHz, the free running phase noise of the SL2610 is typically <-90dBc/Hz

The device can also be programmed to generate all output Ifs commonly used in analog and digital receiver systems.

In high volumes, the SL2610 is priced at $1.94.

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