Highly Stable, Free-Running Reference Oscillators


Six free-running reference oscillators generate a highly stable and accurate output frequency response with low phase noise and spurious performance levels, making them ideal in phase locked loops, function generators, frequency synthesizers and receivers for communication, radar, navigation, surveillance and test and measurement applications. These free-running, fixed-tuned oscillators use a high-stability internal crystal reference as an integral part of the phase-locked assembly with a buffered amplifier output stage for improved ruggedness. They provide a highly reliable single output frequency source and excellent performance with respect to temperature stability, induced noise and overall efficiency.


The free-running reference oscillators are available with single output frequencies of 10 MHz, 50 MHz or 100 MHz. These designs offer a dependable frequency output with stability levels of +/- 5 ppm and are aging-rated at less than 1 ppm. Additional typical performance features include an output power level of +7 dBm, phase noise as low as -150 dBc/Hz at 10 KHz offset and low spurious output of -70 dBc. 


These modules operate over the full temperature range of -30 to +70°C and require a single positive DC voltage supply. They are available in either a compact SMA connectorized package with DC bias pins, or a true surface mount package outline that has a downloadable Gerber file for the mounting footprint. These rugged SMT and coaxial package designs are highly reliable and meet stringent MIL-STD-202 environmental test conditions for shock and vibration.


  • Desirable Fixed Tuned Output Frequencies: 10 MHz, 50 MHz, or 100 MHz
  • Exceptional Phase Noise Performance @ 10 KHz offset: -150 dBc/Hz Typical
  • High Stability levels of +/- 5 ppm and Aging rated at < 1 ppm
  • Free Running Reference Oscillator Output Power Level: +7 dBM Typical
  • Reference Oscillator Low Spurious Output: -70 dBc Typical
  • Operational Temperature Range: -30 to +70°C
  • Rugged SMT and Coaxial Package Designs meet MIL-STD-202 Test Conditions
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