cx24118a NXP Semiconductors, cx24118a Datasheet - Page 3

• Manufacturer Part Number: cx24118a
• Description: Advanced Modulation Digital Satellite Tuner
• Manufacturer: NXP Semiconductors

NXP Semiconductors
General description
Features
Applications
Product Specifications
Block diagram
CX24118A_N_2
Product data sheet
CKREF_OUT
XTAL1
XTAL2
RF_IN
XSEL
AGC
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.
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
8PSK, DVB-S2, and advanced modulation set-top boxes
Commercial digital video, audio, and PVR receivers
RF input: 925–2175 MHz
Symbol rate: 1–45 MSps
Noise figure: 10 dB, typical
Input IP3 at minimum gain: 10 dBm, typical
Control
VCA
Crystal Oscillator
AGC
Clock Control
and
Mixer
0
I/Q
o
90
o
Rev. 02 — 8 September 2009
Filter 1
PLL and VCO
VGA1
Filter 2
Cancellation
Cancellation
DC Offset
DC Offset
Advanced Modulation Digital Satellite Tuner
VGA2
:
:
2,
4
Final
Amplifier
Control
Interface
Filter
Logic
CP_OUT
VTUNE
I_OUT
Q_OUT
SDA
SCL
SADD
CX24118A
© NXP B.V. 2009. All rights reserved.
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