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CMX979

Phase Locked Loop by CML Microcircuits

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The CMX979 from CML Microcircuits is a low power dual RF/IF synthesiser + VCO that provide signal generation over a wide range of frequencies. The RF synthesiser operates over the range of 2.7 - 3.6 GHz with a fully-integrated VCO and PLL and is capable of operating in frequencies in the range of 338 MHz to 3.6 GHz via a configurable output frequency divider.

The CMX979 provides the designer a solution to develop smaller and lower powered RF solutions due to the highly integrated nature of the product. It directly supports both single conversion and super-heterodyne radio architectures and minimises the number of external components needed. Most other integrated solutions are only single synthesisers and so require a second synthesiser to be placed on the PCB in many applications. This device can be used in satellite modems, CATV Equipment, ISM Band modems and a number of other applications.

Product Specifications

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Product Details

  • Part Number
    CMX979
  • Manufacturer
    CML Microcircuits
  • Description
    Dual RF/IF Synthesiser + VCO from 338 MHz to 3.6 GHz

General Parameters

  • Application
    SATCOM, CATV, Wireless Communications
  • Type
    Fractional-N PLL, Integer-N PLL
  • Frequency
    31 to 1 GHz ( IF Synth), 338 to 3.6 GHz (RF Synth)
  • Configuration
    PLL + VCO
  • Phase Noise
    -209 dBc/Hz
  • Output Power
    -15 dBm (IF Synth), -7 dBm (RF Synth)
  • Package Type
    Surface Mount
  • Dimension
    6 x 6 mm
  • Package
    VQFN
  • Phase Detector Type
    Programmable Lock Detector
  • Operating Temperature
    -40 to 85 Degree C
  • Phase Noise at 1 MHz
    -135 to -130 dBc/Hz
  • Phase Noise at 100 KHz
    -105 to -90 dBc/Hz
  • Phase Settling Time
    104 µs
  • PLL Current
    8 mA (IF Synth + VCO), 13 mA (RFSynth + VCO)
  • PLL Voltage
    2.7 to 3.6 V

Technical Documents

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