Selection and replacement principle of active crystal oscillator
how to selection and replacement principle of crystal active oscillator
Crystal active oscillator is a module that integrates quartz crystal resonator and IC to complete specific functions.
It is mainly used in the field of digital electronic products with high requirements for the stability and accuracy of clock signal,
such as Bluetooth module, WiFi module, smart phone, 5G network communication, base station, remote control, geographic survey, GPS positioning, etc.
For conventional crystal active oscillator, the frequency is a fixed value,
so there are not many aspects to be considered in the selection or replacement of crystal oscillator.
1.The same frequency replacement principle, such as 125MHz replacing 125MHz.
2. The output waveform type is consistent, such as CMOS output replacing CMOS output.
3.Consistent working voltage: the common working voltage range is 6V ~ 3.3V, and the common working voltage is 1.8V, 2.5V and 3.3V.
4.Common size: 2520, 3225, 5032, 7050, you can choose the required size according to the circuit board space.
Most of the small sizes have low power consumption.
5.Package: plug in type and chip type, according to the welding method.
6.Frequency accuracy: 10ppm, 20ppm, 30ppm, selected according to the frequency accuracy required by the equipment.
7.Frequency stability: 20ppm, 30ppm, according to the influence of equipment working temperature environment on crystal frequency.
8.Temperature range: - 20 ~ + 70 ℃, - 40 ~ + 85 ℃, - 40 ~ + 105 ℃. The working temperature range of - 40 ~ 105 ℃ is a wide temperature class,
and can adapt to more harsh working environment.
