Email: sales@xtalong.com Tel: +86-28-80192520
Frequency: 125MHz
Supply Voltage: 5V
Aging: ±2ppb/day
Initial Frequency Accuracy: ±200ppb
Temperature Stability:±100ppb@10℃~+45℃
125MHz Ultra-Low Phase Noise OCXO
Extreme Spectral Purity | -183dBc/1MHz | +17dBm High-Power Sine Output
Product Overview
The [XTALOCXO-125MHz series] is a 125MHz Oven Controlled Crystal Oscillator (OCXO) engineered for applications where phase noise is the critical bottleneck. It achieves an industry-leading noise of -183dBc@1MHz and a high-power +17dBm sine wave output. With a daily aging rate of just ±2ppb and a fast 3-minute warm-up time, it provides the ultimate reference for high-speed data converters, radar, and advanced communication systems.
Key Features:
Extreme Noise Floor: Achieves -183 dBc/Hz @ 1MHz, ensuring maximum SNR in ADC/DAC sampling.
High Power Drive: +17 dBm sine wave output can directly drive mixers and samplers without additional gain stages.
Rapid Warm-up: Reaches stability within 3 minutes, ideal for rapid-deployment systems.
Outstanding Long-term Stability: Daily aging of ±2.0 ppb and ±200 ppb for the first year.
G-Sensitivity Optimization: Robust design with 1.0 ppb/g sensitivity across all axes.
Precision Tuning: Voltage control (VC) for frequency adjustment with ±200 ppb initial accuracy.
Applications:
High-Speed Data Converters: Low-jitter clock source for GSPS ADC/DAC sampling.
Advanced Radar Systems: Enhances target detection and resolution through extreme spectral purity.
Satellite Communications: High-stability reference for X-band and Ka-band converters.
Test & Measurement: Laboratory-grade reference for frequency synthesizers.
Specification:
Frequency Stability | |||||||
Parameter | Min | Typ. | Max | Unit | Condition | Note | |
Nominal Frequency | 125.000 | MHz | |||||
Initial Frequency Accuracy |
-200 |
+200 |
ppb | VC=4.5V @25℃, after 15mins power on refer to nominal frequency VC=4.5V @25℃ | |||
Supply Variation |
-10 |
+10 |
ppb |
VS±5% | |||
Load Variation |
-10 |
+10 |
ppb |
CL±5% | |||
Aging |
Per day |
-2.0 |
+2.0 |
ppb |
Aging after 30 days operation | ||
First year |
-200 |
+200 |
ppb | ||||
10 years |
-0.8 |
+0.8 |
ppm | ||||
Temperature Stability |
-100 |
+100 |
ppb | 10℃~+45℃ , refer to 25℃ | |||
G-sensitivity G | 1.0 | ppb/g |
each axis | ||||
Warm-up time |
3.0 |
min | @25℃,Within ±100 ppb of final frequency refer to that on 1 hour. | ||||
Supply Voltage/Current | |||||||
Voltage Supply |
4.75 |
5.0 |
5.25 |
V | |||
Operating Current |
800 |
mA |
during warm up | ||||
Phase Noise | ||||||
Phase Noise | -130 |
dBc/Hz | @100Hz | |||
-160 | @1KHz | |||||
-178 | @10KHz | |||||
-180 | @100KHz | |||||
-183 | @1MHz | |||||
Dimension :mm

Pin function:
Pin No. | Pin Function |
1 | Output |
2 | GND |
3 | VC |
4 | NC |
5 | VS |
Contact: Katya Vane
Phone: +86-18884136031
Tel: +86-28-80192520
Email: sales@xtalong.com
Add: No.4 of XinHang Road, West of High-tech zone, Chengdu City 611731, China
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