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CMX940

Frequency Synthesizer by CML Microcircuits

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The CMX940 from CML Microcircuits is a low-power, high-performance Fractional-N PLL based RF Synthesizer. It has a fully integrated wideband VCO and a programmable output divider that generates signals from 49 to 2040 MHz. The synthesizer has two level-controlled single-ended RF outputs to support Tx and Rx sub-systems. A configurable reference path can be used to minimize close-in phase noise and mitigate integer and fractional boundary spurious.

The synthesizer operates over a supply voltage from 3.0 to 3.6 V. It requires only an external loop filter and clock reference to provide a complete and very compact RF synthesizer solution. The chip configuration is controlled by an SPI-compatible C-BUS serial interface. It is available in a highly integrated LGA-48 package that measures 7 x 7 mm, reducing component count and PCB board area and is suitable for applications such as PMR/LMR, wireless data modem, general-purpose RF and IF, and marine radio.

The low operating voltage and low power consumption of the CMX940 make it ideal for a wide variety of portable and battery-powered wireless applications, including digital narrowband two-way radio equipment compliant with ETSI PMR co-existence standards applicable under the Radio Equipment Directive.

Product Specifications

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Product Details

  • Part Number
    CMX940
  • Manufacturer
    CML Microcircuits
  • Description
    Low-Power RF Synthesizer from 49 to 2040 GHz

General Parameters

  • Synthesizer Type
    Tunable Frequency
  • PLL Type
    Fractional-N
  • Frequency
    49 to 2040 MHz
  • Application
    PMR / LMR (including ETSI compliant radios), Public Safety Radio, Wireless Data Modem, GNSS RTK, Wireless Microphone, Marine Radio, AIS, General Purpose
  • Spurious
    -75 dBc
  • Supply Voltage
    3 to 3.6 V
  • Current
    23 to 64 mA
  • Phase Noise
    -141 to -122 dBc/Hz
  • Phasenoise 10 KHz
    -122 dBc/Hz
  • Phasenoise 1 MHz
    -141 dBc/Hz
  • Switching Speed
    50 us
  • Package Type
    Surface Mount
  • Package
    LGA-48 Package
  • Dimension
    7 x 7 mm

Technical Documents

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