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CX24109
Digital Satellite Tuner
Rev. 01 — 13 November 2008 Product data sheet
Document information Info Keywords Abstract Content
www.DataSheet4U.net
NXP Semiconductors
CX24109
Digital Satellite Tuner
Ordering information
Type number
CX24109-11 CX24109-11Z Digital Satellite Tuner
Description
Package
48-pin eTQFP
Revision history
Revision
01 20081113
Date
Description
First NXP version based on the Conexant 102031A data sheet.
Contact information
For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to:
[email protected]
CX24109_N_1 © NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 13 November 2008
2
www.DataSheet4U.net
NXP Semiconductors
CX24109
Digital Satellite Tuner
General description
The CX24109 is a highly integrated, direct down-conversion satellite tuner intended for high-volume digital video, audio, and data receivers. When combined with the CX24121 QPSK demodulator/FEC decoder, the chip set provides a complete broadband satellite front-end solution capable of operating from 1–45 MSps in the most demanding satellite environments. It is compatible with international standards such as DVB and DSS. The highly integrated CX24109 reduces the tuner BOM cost and simplifies the RF layout.
Features
Zero-IF architecture eliminates the need for image reject filtering Integrated LNA Integrated LO with onboard VCO and synthesizer Single +5 V supply Reference oscillator output for demodulator
Applications
DBS set-top boxes Commercial digital video, audio, and data receivers Digital VCRs
Block diagram
Variable Low Pass Filter
VGA1
VGA2 I Channel Output
VCA RF Input 90 0
VGA1
Variable Low Pass Filter
VGA2 Q Channel Output
Reference Oscillator
VCO PLL Dividers, Phase Detector, and Charge Pump
Reference Programming Lock to DEMOD and Control Detect
CX24109_N_1
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 13 November 2008
3
www.DataSheet4U.net
NXP Semiconductors
CX24109
Digital Satellite Tuner
CX24109_N_1
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 13 November 2008
4
www.DataSheet4U.net
NXP Semiconductors
CX24109
Digital Satellite Tuner
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.1 Pinout Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.2 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.3 Application Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1.4 Signal Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.5 AGC and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.6 Local Oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.7 Programming Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.7.1 Gain Equations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1.7.2 Frequency Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.3 Recommended Default Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.1 AGC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .