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Conexant Systems
Conexant Systems

CX24118 Datasheet Preview

CX24118 Datasheet

Digital Satellite Tuner RF IC

No Preview Available !

CX24118 pdf
Set-top Box Solutions
Satellite
Digital Satellite Tuner RF IC
CX24118
Supports Advanced Modulation Applications
Conexant’s portfolio includes a comprehensive suite of semiconductor solutions
for broadband communications, enterprise networks and the digital home. The
CX24118 is Conexant’s 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
w HomePlug, HomePNA, and WLAN (802.11) components and reference designs.
ww.DaRF INPUT
taIN
SOUT
LNA
hReference
eeOscillator
VCA
VCO
AGC
Amplifier
Variable Low
Pass Filter
90 0
PLL Dividers, Phase
Detector and Charge Pump
t4Reference
Uto Demod
Programming
and Control
.comCX24118 Block Diagram
I Channel
Output
Q Channel
Output
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 CX24118
Description Digital Satellite Tuner RF IC



Conexant Systems
Conexant Systems

CX24118 Datasheet Preview

CX24118 Datasheet

Digital Satellite Tuner RF IC

No Preview Available !

CX24118 pdf
Set-top Box Solutions
Satellite
CX24118 Features
• RF input: 925–2175 MHz
• Input power range: -20 to -90 dBm
• Symbol rate: 1–45 MSps
• Noise figure: 10 dB, typical
• Input IP3 at minimum gain: 10 dBm, typical
• Baseband filter bandwidth: 3–40 MHz
• Output voltage: 0.5 Vp-p @ RL > 1 kΩ:
• Operating temperature: 0–85º 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
© 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.
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# 102374B
04-1283


Part Number CX24118
Description Digital Satellite Tuner RF IC
Maker Conexant Systems
Total Page 2 Pages
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