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Digital Satellite
Tuner RF lC
CX24108
Highly Integrated, Complete Broadband
Satellite Front-End Solution
Conexant鈥檚 CX24108 is our second generation direct down-
conversion satellite tuner RF IC intended for high-volume digital
video, audio and data receivers. When combined with the HM1221
QPSK demodulator/FEC IC, the CX24108 provides a complete
broadband satellite front-end solution capable of operating from
1 to 45 Msps in the most demanding satellite environments. It is
designed for 80+ transponder systems and is compatible with
international standards such as DVB and DSS. The highly integrated
CX24108 satellite tuner RF IC reduces DBS tuner BOM cost and
simpli鏗乪s RF layout.
Following the integrated LNA, the CX24108 downconverts the
satellite carrier directly to baseband and provides variable
baseband 鏗乴tering for the I/Q signals. It also has a completely
integrated local oscillator. The VCO and synthesizer are built
in and do not require external resonators or varactor diodes.
All of this performance is available with just a single +5V supply.
Distinguishing Features
鈥?Single-chip RF-to-baseband satellite receiver
鈥?Zero-IF architecture eliminates the need for
image-reject 鏗乴tering
鈥?Variable baseband 鏗乴ters for optimal
interference rejection
鈥?Integrated LNA and LO with onboard VCO
and synthesizer
鈥?Single +5V supply
CONEXANT
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