Highly integrated, worldwide satellite
silicon tuner
Key features
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Single-chip RF-to-baseband satellite receiver
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Zero-IF architecture eliminates the need for image reject
filtering
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Variable baseband filters for optimal interference rejection
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Auto-tuning machine eliminates the need for software
calibration
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Very low power consumption
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Small (6 mm x 6 mm) footprint
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Lead-free package
Applications
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DSS/DVB set-top boxes
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Digital VCR (DVR)
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Commercial digital video, audio, and data receivers
The CX24113A is NXP’s third generation direct down-conversion satellite tuner RF IC intended for
operator-based digital satellite networks and free-to-air systems.
The CX24113A is a highly integrated satellite tuner solution
that incorporates an advanced Fractional-N synthesizer, I2C
serial interface, a fully integrated local oscillator, and variable
baseband filters. The device has an improved power supply
rejection ratio (PSRR), requires a single +3.3V supply, and
features very low power consumption.
The CX24113A has a built-in auto-tuning machine that
eliminates the need for software calibration and accelerates
the calibration time. The on-chip fractional synthesizer enables
fine frequency step size without adversely affecting lock time.
The CX24113 does not require a balun, thus reducing external
bill of materials (BOM) cost. Its highly integrated design saves
valuable board space and simplifies RF layout.
NXP digital satellite tuner
IC CX24113A
www.nxp.com
© 2008 NXP B.V.
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and
reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use.
Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Date of release: June 2008
Document order number: 9397 750 16587
Printed in the Netherlands
The company’s broad portfolio of semiconductor products
also includes client-side xDSL and cable modem solutions,
home network processors, broadcast video encoders and
decoders, digital set-top box components and systems
solutions, and dial-up modems. In addition to its
IEEE 802.11a/b/g-compliant WLAN chipsets, software
and reference designs, NXP offers a suite of networking
components that includes solutions for applications based on
HomePlug® and HomePNA™. Additional products include a
complete line of asymmetric and symmetric DSL central office
solutions, which are used by service providers worldwide
to deliver broadband data, voice, and video over copper
telephone lines.
CX24113A features
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RF input: 925–2175 MHz
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Input power range: -20 to -90 dBm
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Symbol rate: 1–45 MSps
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Noise figure: 10 dB, typical
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Input IP3 at minimum gain: 10 dBm, typical
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Baseband filter bandwidth: 3–40 MHz
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Output voltage: 0.5 Vp-p @ RL > 1 k_
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Operating temperature: 0–85º C
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Package type: 36-pin, Pb-free, QFN
CX24113 Block Diagram
brb237
Reference
to Demod
Reference
Oscillator
Programming
and Control
PLL Dividers, Phase Detector
and Charge Pump
Q Channel
Output
Variable Low
Pass Filter
I Channel
Output
VCO
RF
Input
Variable Low
Pass Filter
AGC
Amplifier
VCA
90 0
AGC
Amplifier
