set-top box solutions satellite distinguishing features ? single-chip rf-to-baseband satellite receiver ? zero-if architecture eliminates the need for image reject filtering ? very low phase noise for 8psk and dvb-s2 applications ? variable baseband filters for optimal interference rejection ? auto-tuning machine eliminates need for software calibration ? very low power consumption ? small (6 mm x 6 mm) footprint ? lead-free package part number cx 24118 description digital satellite tuner rf ic digital satellite tuner rf ic CX24118 cx2 4118 block diagram supports advanced modulation applications conexants portfolio includes a comprehensive suite of semiconductor solutions for broadband communications, enterprise networks and the digital home. the CX24118 is conexants third generation direct down-conversion satellite tuner rf ic intended for high-volume digital video, audio, and data receivers. the CX24118 offers excellent phase noise performance and very low implementation loss, required for advanced modulation systems such as 8psk and dvb-s2. the CX24118 has a built-in auto-tuning machine that eliminates the need for software calibration routine and accelerates the calibration time. the on-chip fractional synthesizer enables fine frequency step size without adversely affecting lock time. the CX24118 does not require a balun, thus reducing external bom cost. its highly integrated design saves valuable board space and simplifies rf layout. conexant has a broad portfolio of semiconductor products, including: ? dsl, dial-up, and cable modem solutions ? home network processors ? broadcast video encoders and decoders ? digital set-top box components and system solutions conexant also offers wireless data and networking solutions that includes homeplug, homepna, and wlan (802.11) components and reference designs. vco vca pll dividers, phase detector and charge pump programming and control reference to demod va riable low pass filter agc amplifier reference oscillator rf input q channel output lna 90 0 in out i channel output
? 2004, conexant systems, inc. all rights reserved. conexant and the conexant logo are trademarks of conexant systems, inc. all other trademarks are owned by their respective owners. although conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. this material is provided as is and without any express or implied warranties, including merchantability, fitness for a particular purpose and non-infringement. conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. 04-1283 set-top box solutions satellite CX24118 features ? rf input: 925C2175 mhz ? input power range: -20 to -90 dbm ? symbol rate: 1C45 msps ? noise figure: 10 db, typical ? input ip3 at minimum gain: 10 dbm, typical ? baseband filter bandwidth: 3C40 mhz ? output voltage: 0.5 vp-p @ rl > 1 k : ? operating temperature: 0C85o c ? package type: 36-pin, pb-free, qfn applications ? advanced modulation set-top boxes ? dss/dvb set-top boxes ? digital vcr (dvr) ? commercial digital video, audio and data receivers www.conexant.com general information: u.s. and canada: (888) 855-4562 international: (732) 345-7500 headquarters 100 schulz drive red bank, nj 07701 order# 102374 b
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