OCXO Oscillators

OCXO stands for Oven Controlled Crystal Oscillator. These oscillators offer higher stability than standard Clock Oscillators or TCXO’s over temperature variations. They can also offer better overall accuracy over the short term (typically 1x10−12 over a few seconds) and longer-term (typically 1x10−8 (10 ppb) per year).

OCXO’s are precision oscillators that can provide a stable oscillation over variations in ambient temperature. OCXO temperature stability can range from the most basic at 500ppb to sophisticated double ovens at 0.02ppb, with most falling between 50ppb and 3ppb.

OCXO’s work through the tight control of their internal oven that keeps the chamber and the crystal at a set temperature, so holding the frequency stable. The temperature selected for the oven is one at which the slope of the crystal's frequency vs. temperature curve is near zero. This is called the &147turn point&148 of the crystal and is normally 75°C to 80°C for commercial OCXO’s. For industrial grade OCXO’s where the maximum temperature can vary up to 85°C, the turn point will be higher still. The important design consideration is that the turn point/oven temperature must be higher than the operating temperature, so frequency control is maintained.

Output logic options for these oscillators consist of HCMOS, Clipped Sine-wave, and Sine-wave configurations


Type of Crystal used


OCXO’s generally use AT-cut or SC-cut (Stress-Compensated) crystals in their design, with the SC-cut being used for higher performance. The SC-cut crystal offer flatter frequency vs. temperature curve reduces warmup time, and has other good attributes, like better ageing, higher Q resulting in better phase noise, less G-sensitivity, and less sensitive to vibration.

Applications:


  • Broadcasting
  • Satellite Systems
  • Telecommunications
  • Data communications
  • Test and measurement
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Part Details Brand Stock Output Frequency Frequency Stability Package Type Output Level Minimum Operating Temperature Maximum Operating Temperature Height Dimensions
Micro Crystal 10 MHz OCXO Oscillator, PDIP ±0.2ppm HCMOSOCXOV-AV5-10.000
  • £ 139.33
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Micro Crystal Please note that the Stock level on this page is periodically updated during the day.

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12 Please note that the Stock level on this page is periodically updated during the day.

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10 MHz Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 894-9809
  • Brand IQD
  • Mfr. Part No. LFOCXO063815Bulk
IQD Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 894-9782
  • Brand IQD
  • Mfr. Part No. LFOCXO063800Bulk
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  • RS Stock No. 693-6744
  • Brand MMD
  • Mfr. Part No. MOFH5200C-10.000
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  • RS Stock No. 894-9798
  • Brand IQD
  • Mfr. Part No. LFOCXO063802Bulk
IQD Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels 19.2 MHz Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 894-9802
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  • Mfr. Part No. LFOCXO063804Bulk
IQD Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels 38.88 MHz Please note that the Stock level on this page is periodically updated during the day.

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±20ppb Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 693-6740
  • Brand MMD
  • Mfr. Part No. MOFH5200C-100.000
MMD Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels 100 MHz Please note that the Stock level on this page is periodically updated during the day.

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±200ppb Please note that the Stock level on this page is periodically updated during the day.

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