Product description

The CMX972 features a low-power quadrature IF/RF demodulator with wide operating frequency range and optimised power consumption.

The demodulator is suitable for superheterodyne architectures with IF frequencies up to 300MHz and may be used in low IF systems or in those converting down to baseband.

An on-chip PLL and VCO, together with uncommitted baseband differential amplifiers, provide additional flexibility. Control of the CMX972 is by serial bus.

The small, RF-optimised 32-pin VQFN package and minimal external components make the device ideal for space-constrained applications.

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Devices are available through our distributors below:

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Block diagram

CMX972_blockdiagram

Technical Portal

No additional information available.

Please ensure that you have downloaded the latest datasheet containing up-to-date information on product operation, technical specifications and packaging.

Features

  • 20 – 300MHz IF/RF Demodulator
  • 10MHz Rx I/Q Bandwidth
  • < 1 degree I/Q Phase Matching
  • < 0.5 dB I/Q Gain Matching
  • IF PLL and VCO amp
  • Low Power 24mA @ 3.3V
  • Small 32-lead VQFN Package

Applications

  • Wireless Data Terminals
  • HF/VHF and UHF Mobile Radio
  • Avionics Radio Systems
  • Software Defined Radio (SDR)
  • Satellite Terminals

Power supply requirement

  • 3.0 to 3.6 V power supply

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Design resources

Frequency Estimation for a VCO using a Negative Resistance Amplifier

Application Note describing how to estimate the operating frequency of VCO designs using a negative resistance amplifier. An Excel spreadsheet that automates the calculation is available below.

Excel Spreadsheet - Frequency Estimation for a VCO using a Negative Resistance Amplifier

An Excel spreadsheet that calculates the operating frequency of VCO designs using a negative resistance amplifier. An Application Note describing the process is available above.

EV9720 Evaluation Kit

EV9720 EV9720 The EV9720 is designed for evaluating and demonstrating the capabilities of the CMX972. The EV9720 provides all of the necessary circuits for the IC such as power supply regulators and matching circuits etc. EV9720_Product_Preview

EV9720_User Manual

C-BUS Guides

Guides to operation and interfacing

EV9720 Board Schematics

EV9720 high resolution schematics. Version A02

EV9720 Evaluation Software

EV9720 Evaluation Software. Requires a PE0003 Universal Interface Card. Version 3.1

PE0003 Driver

PE0003 USB driver for Windows. Version 1.0

EV9720 PCB Information

Additional information for EV9720 serial numbers 201110 - 201133

Package: Q5

32-pin VQFN

VQFN Design Guidance Notes

VQFN Design Guidance Notes

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