cx24132 Conexant Systems, Inc., cx24132 Datasheet

cx24132

Manufacturer Part Number

cx24132

Description

Dual Low-power 8psk Digital Satellite Tuner

Manufacturer

Conexant Systems, Inc.

Datasheet

1.CX24132.pdf (2 pages)

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Set-top Box Solutions

Satellite

Dual Low-power 8PSK Digital

Satellite Tuner

CX24132

Conexant’s portfolio includes a comprehensive suite of semiconductor

solutions for broadband communications and the digital home.

The CX24132 is Conexant’s second-generation dual 8PSK tuner with improved

This unique stand-alone dual tuner’s small size (7 mm x 7 mm) allows system

The CX24132 offers improved spurious-free dynamic range compared to

The device also meets other performance requirements that are necessary

The CX24132 includes many features that simplify the design or improve

The CX24132 uses a small 7 mm x 7 mm 48-pin lead-free Quad Flat-No Lead

complete dual-tuner solution includes all necessary Low Noise Amplifiers

(LNAs), Voltage-Controlled Oscillators (VCOs), synthesizers, mixers, and filters

(typically 160 Hz).

designers to significantly reduce the PCB size of dual front-ends, especially

At 1 W typical with both channels active, the CX24132 (along with other

Conexant tuners) offers the lowest per-channel power of any standards

compliant 8PSK tuner. In addition, the CX24132 is powered by a single 3.3

V power supply, allowing a low-power, simple, cost-effective power supply

design.

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

section.

detectors have been added to allow estimation of composite input power for

optimal gain distribution. In more complex designs, the power detectors can

drive external PIN diode attenuators.

In addition to the Bill of Material (BOM) savings that its high level of

other features that lower system BOM cost. In particular, both tuners are

clocked from the same crystal and a buffered version of this clock is made

In addition, the RF inputs can be operated single-ended, eliminating the need

(QFN) package. Multiple reference designs that include this IC and various

Conexant dual demodulators are available.

performance and added features. It is designed with a SiGe BiCMOS process

to provide the excellent performance that is required by demanding 8PSK

applications, while maintaining low power consumption. This highly-integrated

required for common applications. The device employs fractional synthesizers

that provide excellent phase noise while maintaining a very small step size

when used with Conexant’s dual DVB-S2 or 8PSK Turbo demodulators.

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

in demanding 8PSK applications, as listed in the “Distinguishing Features”

performance. To improve performance, integrated wideband RF power

be used in conjunction with high current General Purpose Outputs (GPOs) to

integration and single 3.3V supply provides, the CX24132 incorporates several

available to drive companion ICs, such as Conexant demodulators and tuners.

for baluns in most applications.

Distinguishing Features

Part Number CX24132

Description

• Complete dual 8PSK tuner

• Integrated LNA

• Low power (1 W typical)

• Single 3.3 V power supply

• Superior phase noise (0.36 deg RMS DSB)

• Outstanding noise figure (10 dB typical)

• Exceptional linearity (9 dBm IIP3)

• Excellent spurious-free dynamic range

• 65 dB isolation between channels

• Buffered clock output

• Single-ended RF inputs

• Built in auto-tuning machine

• High current GPOs

• Wideband RF power detectors

Dual Low-power 8PSK

Digital Satellite Tuner

Related parts for cx24132

cx24132 Summary of contents

Page 1

... ICs, such as Conexant demodulators and tuners. In addition, the RF inputs can be operated single-ended, eliminating the need for baluns in most applications. The CX24132 uses a small 48-pin lead-free Quad Flat-No Lead (QFN) package. Multiple reference designs that include this IC and various Conexant dual demodulators are available. ...

Page 2

... VGA Gain States 90 o I/Q DC Offset Cancellation CX24132 Functional Block Diagram Product Specifications • Supports 8PSK and QPSK modulation formats • Supported symbol rates: 1-45 MSps • RF input frequency: 925 to 2175 MHz • Dynamic range: -23 to -69 dBm • Small , lead-free 48-pin QFN package www ...

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