CX24118A
Advanced Modulation Digital Satellite Tuner
Rev. 02 — 8 September 2009
Product data sheet
Document information
Info
Keywords
Abstract
Content
NXP Semiconductors
CX24118A
Advanced Modulation Digital Satellite Tuner
Ordering information
Type number
CX24118A-12Z*
Description
Advanced Modulation Digital Satellite Tuner
36-pin QFN
Package
*Lead-free (Pb Free) and RoHS compliant
Revision history
Revision
02
01
20090908
20081125
Date
Added
Figure 12
Description
First NXP version based on the Conexant 102322A data sheet.
Contact information
For more information, please visit:
http://www.nxp.com
For sales office addresses, please send an email to:
salesaddresses@nxp.com
CX24118A_N_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 8 September 2009
2
NXP Semiconductors
CX24118A
Advanced Modulation Digital Satellite Tuner
General description
The CX24118A is a direct down-conversion satellite tuner intended for high-volume digital
video, audio, and data receivers. The CX24118A offers excellent phase noise performance
and very low implementation loss, required for advanced modulation systems such as 8PSK
and DVB-S2.
The CX24118A has a built-in auto-tuning system that eliminates the need for software
calibration. The on-chip fractional synthesizer enables fine frequency step size without
adversely affecting lock time. The CX24118A does not require a balun, thus reducing
external BOM cost. Its highly integrated design saves valuable board space and simplifies
RF layout.
Features
Single-chip RF-to-baseband satellite receiver
Zero-IF architecture eliminates the need for image reject filtering
Very low phase noise integrated Local Oscillators (LOs) for 8PSK and DVB-S2
applications
Variable baseband filters for optimal interference rejection
Auto-tuning system eliminates need for software calibration
Very low power consumption
Small (6 mm x 6 mm) footprint
Lead-free package
Applications
8PSK, DVB-S2, and advanced modulation set-top boxes
Commercial digital video, audio, and PVR receivers
Product Specifications
RF input: 925–2175 MHz
Symbol rate: 1–45 MSps
Noise figure: 10 dB, typical
Input IP3 at minimum gain: 10 dBm, typical
Block diagram
CP_OUT
VTUNE
PLL and VCO
DC Offset
Cancellation
Filter 1
VGA1
Filter 2
VGA2
:
2,
:
4
I/Q
Mixer
VCA
RF_IN
0
o
I_OUT
Final
Amplifier
90
o
Q_OUT
DC Offset
Cancellation
Filter
Control
Logic
Interface
SDA
SCL
SADD
AGC
Control
AGC
XSEL
XTAL1
XTAL2
CKREF_OUT
Crystal Oscillator
and
Clock Control
CX24118A_N_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 8 September 2009
3
NXP Semiconductors
CX24118A
Advanced Modulation Digital Satellite Tuner
CX24118A_N_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 8 September 2009
4
NXP Semiconductors
CX24118A
Advanced Modulation Digital Satellite Tuner
11
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1
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1
Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Functional Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Downconverter and Baseband Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Gain Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4
Local Oscillator and PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5
Crystal Oscillator and Reference Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6
Automatic Tuning System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.1
Auto-tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Serial Programming Interface and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1
Serial Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3
Register Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4
Register Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Application Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
Thermal Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
Sleep Mode Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1
Changing from Normal Operation to Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2
Changing from Sleep Mode to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Electrical, Thermal, and Mechanical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1
S11 Plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2
Electrical and Thermal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3
Receiver Electrical and Thermal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3
Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Legal information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CX24118A_N_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 8 September 2009
5
