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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Description Price Output Frequency Frequency Stability Load Capacitance Package Type Output Level Minimum Operating Temperature Maximum Operating Temperature Height Dimensions Oscillator Type
RS庫存編號 894-9809
製造零件編號LFOCXO063815Bulk
BrandIQD
HK$2,034.29
單位
10 MHz ±1ppb 15pF 36x27mm DIP Sinewave -40 °C +85 °C 13mm 36.2 x 27.2 x 13mm OCXO
RS庫存編號 894-9782
製造零件編號LFOCXO063800Bulk
BrandIQD
HK$1,060.01
單位
10 MHz ±20ppb 15pF SMD HCMOS -40 °C +85 °C 6.5mm 14.4 x 9.5 x 6.5mm OCXO
RS庫存編號 729-3329
製造零件編號OCXOV-AV5-10.000
HK$1,223.81
單位
10 MHz ±0.2ppm - PDIP HCMOS 0 °C +60 °C 7.8mm 20.14 x 12.52 x 7.8mm OCXO
RS庫存編號 894-9802
製造零件編號LFOCXO063804Bulk
BrandIQD
HK$1,060.01
單位
38.88 MHz ±20ppb 15pF SMD HCMOS -40 °C +85 °C 6.5mm 14.4 x 9.5 x 6.5mm OCXO
RS庫存編號 894-9792
製造零件編號LFOCXO063803Bulk
BrandIQD
HK$1,060.01
單位
20 MHz ±20ppb 15pF SMD HCMOS -40 °C +85 °C 6.5mm 14.4 x 9.5 x 6.5mm OCXO
RS庫存編號 894-9798
製造零件編號LFOCXO063802Bulk
BrandIQD
HK$1,060.01
單位
19.2 MHz 0.001ppm 15pF SMD HCMOS -40 °C +85 °C 6.5mm 14.4 x 9.5 x 6.5mm OCXO
RS庫存編號 693-6740
製造零件編號MOFH5200C-100.000
BrandMMD
HK$1,210.00
單位
100 MHz ±200ppb 15pF PDIP HCMOS -20 °C +70 °C 13.1mm 20.7 x 10.8 x 13.1mm OCXO
RS庫存編號 894-9795
製造零件編號LFOCXO063801Bulk
BrandIQD
HK$1,060.01
單位
12.8 MHz ±20ppb 15pF SMD HCMOS -40 °C +85 °C 6.5mm 14.4 x 9.5 x 6.5mm OCXO
RS庫存編號 693-6744
製造零件編號MOFH5200C-10.000
BrandMMD
HK$1,197.00
單位
10 MHz ±200ppb 15pF PDIP HCMOS -20 °C +70 °C 13.1mm 20.7 x 10.8 x 13.1mm OCXO