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Low g-sensitivity Product Solutions
Technical Resources
Low Phase Noise    High Stability    High Shock & Vibration    Low g-sensitivity    Extended Temp Range

G-sensitivity is defined as a change in frequency resulting from an acceleration force applied to an oscillator. It is often expressed in terms of ppb/g. How does this affect performance? When an oscillator is used in an environment conducive to vibration, the frequency of the vibration will modulate the carrier frequency degrading the phase noise performance of the oscillator. This phenomenon is similar for both random and sine vibration and is also very deterministic meaning the magnitude of the induced phase noise degradation can be calculated if the g-sensitivity of the oscillator is known. John Vig has written an excellent tutorial on quartz crystals and resonator stabilities [1]. Please follow the link to an excerpt from John's tutorial which will provide a more detailed description of g-sensitivity and the equations for calculating the resulting phase noise in random and sine vibration environments.

John Vig Tutorial
[1] J.R. Vig, "Quartz Crystal Resonators and Oscillators – For Frequency Control and Timing Applications - A Tutorial", January 2004

Find a solution from our portfolio that meets your Low g-sensitivity requirements

  Product Package Size (mm) Frequency Range Temp Stability
–40 to 85°C		 g-sensitivity Shock Vibration
MEMS HT-MM900B 3.2 x 2.5 x 0.75
2.5 x 2.0 x 0.75
2.0 x 1.6 x 0.75 		3.5 to 100 MHz 25ppm 0.1ppb/g
 
XO PX-990 48.27 x 58.25 x 27 60 to 120 MHz 25ppm 0.5ppb/g
PX-504 9.5 x 14.5 x 2.8 30 to 180 MHz 25ppm 0.3ppb/g
 
VCXO VX-504 9.5 x 14.5 x 2.8 30 to 160 MHz 30ppm 0.3ppb/g
VX-990 48.27 x 58.25 x 27 60 to 120 MHz 25ppm 0.5ppb/g
 
VCSO VS-508 9 x 14 x 4.9 800 to 2900 MHz 20ppm 0.6ppb/g
 
TCXO TX-709 5 x 7 x 2.8 8 to 52 MHz &
96 to 160 MHz 		1.0ppm 0.1ppb/g
TX-552 11 x 9 x 3.7 8 to 150 MHz 1.0ppm 0.2ppb/g
TX-322 23 x 18 5 to 50 MHz 1.0ppm 0.2ppb/g
 
OCXO OX-080 37 x 37 x 13 8 to 15 MHz 30ppb 0.02ppb/g
OX-047 52 x 52 x 20 8 to 15 MHz 30ppb 0.02ppb/g
OX-048 52 x 52 x 20 80 to 120 MHz 150ppb 0.05ppb/g
OX-407 14 x 20 x 11 10 to 50 MHz 100ppb 0.07ppb/g
OX-405 13.21 x 20.83 x 10.16 80 to 120 MHz 700ppb 0.5ppb/g
OX-990 48.27 x 58.25 60 to 120 MHz 200ppb 0.5 ppb/g
 

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