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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Beskrivning Pris Oscillator Type Output Frequency Frequency Stability Load Capacitance Package Type Output Level Minimum Operating Temperature Maximum Operating Temperature Height Dimensions
RS-artikelnummer 693-6744
Tillv. art.nrMOFH5200C-10.000
VarumärkeMMD
1 822,37 kr
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OCXO 10MHz ±200ppb 15pF PDIP HCMOS -20°C 70°C 13.1mm 20.7 x 10.8 x 13.1mm
RS-artikelnummer 729-3329
Tillv. art.nrOCXOV-AV5-10.000
VarumärkeMicro Crystal
1 853,76 kr
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OCXO 10MHz ±0.2ppm - PDIP HCMOS 0°C 60°C 7.8mm 20.14 x 12.52 x 7.8mm
Nytt
RS-artikelnummer 205-5876
Tillv. art.nrSGTM10HP-5V0-B-S5
VarumärkeSYRLINKS
6 924,67 kr
Each
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OXCO 10MHz ±10ppb 15pF Encapsulated Europack Sine - - - -
Nytt
RS-artikelnummer 205-5869
Tillv. art.nrEWOS20-5V0-B-C1
VarumärkeSYRLINKS
3 259,93 kr
Each (In a Box of 2)
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OXCO 20MHz ±70ppb 10pF DIL14 Low Clipped Sinewave - - - -
Nytt
RS-artikelnummer 205-5875
Tillv. art.nrEWOS831-5V0-B-S4
VarumärkeSYRLINKS
5 454,53 kr
Each
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OXCO 10MHz ±10ppb 15pF Europack High Sine - - - -
RS-artikelnummer 894-9798
Tillv. art.nrLFOCXO063802Bulk
VarumärkeIQD
707,98 kr
Each
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OCXO 19.2MHz 0.001ppm 15pF SMD HCMOS -40°C 85°C 6.5mm 14.4 x 9.5 x 6.5mm
RS-artikelnummer 894-9782
Tillv. art.nrLFOCXO063800Bulk
VarumärkeIQD
707,98 kr
Each
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OCXO 10MHz ±20ppb 15pF SMD HCMOS -40°C 85°C 6.5mm 14.4 x 9.5 x 6.5mm
RS-artikelnummer 894-9809
Tillv. art.nrLFOCXO063815Bulk
VarumärkeIQD
1 636,82 kr
Each
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OCXO 10MHz ±1ppb 15pF 36x27mm DIP Sinewave -40°C 85°C 13mm 36.2 x 27.2 x 13mm
Nytt
RS-artikelnummer 205-5871
Tillv. art.nrSGTM10-3V3-B-H6
VarumärkeSYRLINKS
4 783,34 kr
Each
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OXCO 10MHz ±70ppb 15pF Encapsulated DIL14 HCMOS - - - -
Nytt
RS-artikelnummer 205-5868
Tillv. art.nrEWOS10-5V0-B-C1
VarumärkeSYRLINKS
3 062,86 kr
Each (In a Box of 2)
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OXCO 10MHz ±70ppb 10pF DIL14 Low Clipped Sinewave - - - -
Nytt
RS-artikelnummer 205-5874
Tillv. art.nrEWOS10HP-5V0-B-S4
VarumärkeSYRLINKS
5 422,54 kr
Each
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OXCO 10MHz ±10ppb 15pF Europack High Sine - - - -
RS-artikelnummer 894-9802
Tillv. art.nrLFOCXO063804Bulk
VarumärkeIQD
707,98 kr
Each
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OCXO 38.88MHz ±20ppb 15pF SMD HCMOS -40°C 85°C 6.5mm 14.4 x 9.5 x 6.5mm
Nytt
RS-artikelnummer 205-5873
Tillv. art.nrSGTM20-3V3-B-H6
VarumärkeSYRLINKS
4 783,34 kr
Each
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OXCO 20MHz ±70ppb 15pF Encapsulated DIL14 HCMOS - - - -
Nytt
RS-artikelnummer 205-5870
Tillv. art.nrEWOS40-5V0-B-C1
VarumärkeSYRLINKS
3 329,195 kr
Each (In a Box of 2)
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OXCO 40MHz ±70ppb 10pF DIL14 Low Clipped Sinewave - - - -