cx24133 Conexant Systems, Inc., cx24133 Datasheet

cx24133

Manufacturer Part Number

cx24133

Description

Dual Low-power Qpsk Digital Satellite Tuner

Manufacturer

Conexant Systems, Inc.

Datasheet

1.CX24133.pdf (2 pages)

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Set-top Box Solutions

Satellite

Dual Low-power QPSK Digital

Satellite Tuner

CX24133

Conexant’s portfolio includes a comprehensive suite of semiconductor

solutions for broadband communications and the digital home.

The CX24133 is Conexant’s second-generation dual QPSK tuner with

This highly-integrated complete dual-tuner solution includes all necessary

The CX24133 offers improved spurious-free dynamic range compared to

The dual tuner’s small size (7 mm x 7 mm) allows system designers to

The CX24133 uses a small 7 mm x 7 mm 48-pin lead-free Quad Flat-No

synthesizers, mixers, and filters required for common applications. The

device employs fractional synthesizers that provide excellent phase noise

2-layer PCB designs, while providing added margin to 4-layer PCB designs.

Integrated wideband RF power detectors have been added to allow

estimation of composite input power for optimal gain distribution.

significantly reduce the PCB size and cost, while its single 3.3 V power

supply allows a simple, cost-effective power supply design. To further

clock is made available to drive companion ICs, such as other Conexant

demodulators or tuners. In addition, the single-ended RF inputs eliminate

improved performance and added features. It is designed with a SiGe

BiCMOS process to provide excellent performance while consuming very

little power (1 W typically with both channels active).

Low Noise Amplifiers (LNAs), Voltage-Controlled Oscillators (VCOs),

while maintaining a very small step size (typically 160 Hz). An auto tuning

machine eliminates the need for software calibration.

previous generation dual tuners. This allows compatibility with low-cost

reduce Bill of Material (BOM) cost, a buffered version of the crystal

the need for baluns in most applications.

Lead (QFN) package. A reference design is available.

Distinguishing Features

Part Number CX24133

Description

• Complete dual QPSK tuner

• Integrated LNA

• Low power (1 W typical)

• Single 3.3 V power supply

• Superior phase noise (1.02 deg RMS DSB)

• Outstanding noise figure (11 dB typical)

• Exceptional linearity (5 dBm IIP3)

• Excellent spurious-free dynamic range

• 65 dB isolation between channels

• Buffered clock output

• Built in auto-tuning machine

• Wideband RF power detectors

• Single-ended RF inputs

Dual Low-power QPSK

Digital Satellite Tuner

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