d i g i t a l i n f o t a i n m e n t p r o d u c t s
Digital Satellite
Tuner RF lC
D i s t i n g u i s h i n g F e a t u r e s
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
Highly Integrated, Complete Broadband
Satellite Front-End Solution
Conexant's CX24108 is our second generation direct down-
conversion satellite tuner RF IC intended for high-volume digital
video, audio and data receivers. When combined with the HM1221
QPSK demodulator/FEC IC, the CX24108 provides a complete
broadband satellite front-end solution capable of operating from
1 to 45 Msps in the most demanding satellite environments. It is
designed for 80+ transponder systems and is compatible with
international standards such as DVB and DSS. The highly integrated
CX24108 satellite tuner RF IC reduces DBS tuner BOM cost and
simplifies RF layout.
Following the integrated LNA, the CX24108 downconverts the
satellite carrier directly to baseband and provides variable
baseband filtering for the I/Q signals. It also has a completely
integrated local oscillator. The VCO and synthesizer are built
in and do not require external resonators or varactor diodes.
All of this performance is available with just a single +5V supply.
C X 2 4 1 0 8
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: 12 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, R
L
1k
: 0.5 V
p-p
Typical junction temperature: 90 C at
room temperature
Operating temperature range: 0 to 70 C
Package type: 48-pin eTQFP
CX24108 block diagram
f e a t u r e s a n d s p e c i f i c a t i o n s
Conexant and the Conexant symbol are trademarks of Conexant Systems, Inc.
www.conexant.com
Further Information
literature@conexant.com
(800) 854-8099 (North America)
(949) 483-6996 (International)
Order # 100969A
00-0600
Digital Infotainment
Printed in USA
World Headquarters
Conexant Systems, Inc.
4311 Jamboree Road
Newport Beach, CA
92660-3007
Phone: (949) 483-4600
Fax 1: (949) 483-4078
Fax 2: (949) 483-4391
Americas
U.S. Northwest Santa Clara
Phone: (408) 249 -9696
Fax: (408) 249 -7113
U.S. Southwest Los Angeles
Phone: (805) 376 -0559
Fax: (805) 376 - 8180
U.S. Southwest Newport Beach
Phone: (949) 483-9119
Fax: (949) 483-9090
U.S. San Diego
Phone: (858) 713-4730
Fax: (858) 713-4008
U.S. North Central Illinois
Phone: (630) 773-3454
Fax: (630) 773 -3907
U.S. South Central/Mexico
Texas
Phone: (972) 733-0723
Fax: (972) 407- 0639
U.S. Northeast Massachusetts
Phone: (978) 367-3200
Fax: (978) 256 - 6868
U.S. Carolinas North Carolina
Phone: (919) 858 -9110
Fax: (919) 858 - 8669
U.S. Southeast/South America
Florida
Phone: (727) 799 - 8406
Fax: (727) 799 - 8306
U.S. Mid-Atlantic Pennsylvania
Phone: (215) 244- 6784
Fax: (215) 244- 9292
Canada Ontario
Phone: (613) 271-2358
Fax: (613) 271-2359
Europe
Europe Central Germany
Phone: +49 89 829 -1320
Fax: +49 89 834-2734
Europe North England
Phone: +44 1344 486444
Fax: +44 1344 486555
Europe Israel/Greece
Phone: +972 9 9524000
Fax: +972 9 9573732
Europe South France
Phone: +33 1 41 44 36 51
Fax: +33 1 41 44 36 90
Europe Mediterranean Italy
Phone: +39 02 93179911
Fax: +39 02 93179913
Europe Sweden
Phone: +46 (0) 8 5091 4319
Fax: +46 (0) 8 590 041 10
Europe Finland
Phone: +358 (0) 9 85 666 435
Fax: +358 (0) 9 85 666 220
Asia Pacific
Taiwan
Phone: (886 -2) 2-720-0282
Fax: (886 -2) 2-757- 6760
Australia
Phone: (61-2) 9869 4088
Fax: (61-2) 9869 4077
China Central
Phone: 86 -21- 6361-2515
Fax: 86 -21- 6361-2516
China South
Phone: (852) 2 827- 0181
Fax: (852) 2 827- 6488
China South (Satellite)
Phone: (86) 755 -5182495
Fax: (86 ) 755 -5183024
China North
Phone: (86 -10) 8529 - 9777
Fax: (86 -10) 8529 - 9778
India
Phone: (91-11) 692-4789
Fax: (91-11) 692 -4712
Korea
Phone: (82-2) 565-2880
Fax: (82-2) 565-1440
Korea (Satellite)
Phone: (82-53) 745-2880
Fax: (82-53) 745-1440
Singapore
Phone: (65) 737 7355
Fax: (65) 737 9077
Japan
Phone: (81-3) 5371 1520
Fax: (81-3) 5371 1501
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