CX24109 CONEXANT | Alldatasheet
Document overview
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Technical content
- 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 T uner 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, RL≥1kΩ: 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 431 1 Jamboree Rd, P .O. Box C Newport Beach, CA 92660-3095 Order# 102204A Complete IC System Solution for Worldwide DBS Platforms RJ-11 CX20493 SmartDAA Line Side Device A/V Connectors SDRAM DBS Core System Receiver and Decoder TDA8004 CA Card Reader Front Panel buttons, indicators, IRin E2PROM FLASH RF Connector Stereo DAC CX24109 Zero I/F Tuner Xtal