The stability of crystal oscillator is an important index to measure the quality of crystal oscillator, so how should we ensure the stability of crystal oscillator? Xiao Bian tells you that you can actually consider several factors.



1. Output frequency

All crystal oscillators have a certain output frequency. By definition, an oscillator is a device that accepts an input voltage, generally a DC voltage, and produces a repeated AC output at a certain frequency. The frequency required depends on the type of system and how the oscillator is used.



2. Frequency and range

The stability of the crystal oscillator is closely related to the frequency, and can also be more simply regarded as the frequency change caused by some reason divided by the center frequency. Using the formula, it is stability = frequency change ÷ center frequency

For example, if the oscillator output frequency is 10MHz and the temperature changes by 10Hz, then the corresponding temperature stability is 10/10,000,000 = 1x10-6 = 1ppm. Generally, the prevailing stability is in the range of 100ppm to 0.001ppm.



In general, the frequency stability of the crystal oscillator is usually related to the specific requirements, so that the type of crystal oscillator that will be required can be further determined. The crystal oscillator must be in a certain temperature range to truly achieve stability.