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125MHz Ultra Low Phase Noise OCXO

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

125MHz OCXO dimension.png

Pin function:

Pin No.

Pin Function

1

Output

2

GND

3

VC

4

NC

5

VS

5MHz High Short Term Frequency Stability OCXO


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