Set-top Box Solutions
Satellite
Distinguishing Features
DVB/DSS/DCII compliant
Single-chip RF-to-baseband
satellite receiver
Zero-IF architecture eliminates
the need for image-reject filtering
Variable baseband filters for optimal
interference rejection
Integrated LNA and LO with onboard
VCO and synthesizer
Single +5V supply
48-pin ETQFP
Highly Integrated, Direct Down-Conversion Satellite Tuner
Conexant's broadband communications portfolio includes a comprehensive
suite of semiconductor solutions that enable the digital home and information
network. Combining extensive experience in broadband systems and mixed-
signal integrated circuit design, Conexant introduces the CX24109 Digital
Satellite Tuner a highly integrated, direct down-conversion satellite tuner
intended for high-volume digital video, audio, and data receivers. The
CX24109 consists of an LNA, variable RF attenuator, quadrature
downconverter, variable IF gain amplifiers, variable low-pass filters, VCO,
and synthesizer. This highly integrated satellite tuner RF IC does not require
a balun, therefore simplifying RF layout and reducing the overall BOM cost.
When combined with Conexant's CX24123 QPSK demodulator/FEC decoder,
the chipset provides a complete broadband satellite front-end solution capable
of operating from 1 to 45 Msps in the most demanding satellite environments.
The CX24109 and CX24123 provides a streamlined, cost optimized front-end
solution offered in a compact design that saves valuable board space and is
easy to implement.
Part Number CX24109
Description Digital Satellite Tuner
CX24109
Digital Satellite Tuner
CX24109 Block Diagram
2003, 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.
03-0856
Set-top Box Solutions
Satellite
CX24109 Product Features
Single-chip RF-to-baseband satellite receiver
Zero-IF architecture eliminates the need for
image-reject filtering
Integrated LNA
Integrated LO with onboard VCO and synthesizer
Variable baseband filters for optimal
interference rejection
Single +5V supply
Product Specifications
RF input: 950 to 2150 MHz
Input power range: -20 to -81 dBm
Noise figure: 10 dB, typical
Input IP3 at minimum gain: 10 dBm, typical
I/Q phase difference: 3 degrees, typical
I/Q amplitude difference: 1.5 dB, typical
Filter tune range: 0.5 to 30 MHz
Output voltage, RL1k: 0.5 Vp-p
Typical junction temperature: 90 C at room temperature
Operating temperature range: 0 to 70 C
Package type: 48-pin ETQFP
Applications
DBS set-top boxes
Commercial digital video, audio and data receivers
Digital VCRs
www.conexant.com
General Information:
U.S. and Canada: (800) 854-8099
International: (949) 483-6996
Headquarters Newport Beach
4311 Jamboree Rd, P.O. Box C
Newport Beach, CA 92660-3095
Order# 102204A
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