高精度的SMD振荡器深受智能家居应用的追棒ECS-8FMX-080-T，在比较石英和 MEMS 的频率与温度稳定性时。您会看到基于石英贴片晶振的振荡器遵循 AT 晶体的连续三次曲线，并在 -40°C ~ +85°C 范围内达到 ±25 ppm，这对于大多数应用来说已经足够了。

查看 MEMS 图，它似乎具有更好的频率与温度特性，但如果仔细观察，您会发现该图显示了在调整 PLL 分频比以补偿温度变化时引起的频率跳跃。这会导致显着的频率跳跃，以补偿 MEMS 谐振器的显着频率漂移（30 ppm/°C 或 3750 ppm -40°C ~ +85°C）

石英在温度范围内比 MEMS 更稳定，并提供高“Q”性能。基于石英的振荡器不需要采用温度补偿来在所需温度范围内保持低至 ±10 ppm 的稳定性。如果需要更好的稳定性，您可以向石英晶体振荡器添加温度补偿，并在整个温度范围内获得低至 0.5 ppm 的稳定性。

When comparing the Frequency vs. Temperature stability of quartz and MEMS. You see that the quartz-based oscillator follows the continuous cubic curve of an AT crystal and achieves ±25 ppm from -40°C ~ +85°C, which is good enough for most applications.

Looking at the MEMS plot it appears to have better frequency vs. temperature characteristics, but if you look closely you can see that the plot shows frequency jumps caused when the PLL division ratio is adjusted to compensate for changes in temperature. This causes significant Frequency jumps in order to compensate for the considerable frequency drift of the MEMS resonator (30 ppm/°C or 3750 ppm -40°C ~ +85°C)

Quartz is much more stable over temperature than MEMS and offers high “Q” performance. The quartz-based oscillator does not need to employ temperature compensation to maintain stabilities as low as ±10 ppm over the required temperature range. If better stabilities are required, you can add temperature compensation to a quartz oscillator and get stabilities as low as 0.5 ppm over temperature.