
What is the minimum information needed to specify a crystal? 对无源晶振正确报价需要的最基本信息有哪些?
The following specifications are required to be able to quote the correct part:
Frequency of oscillation振荡频率: (MHz)
Model Name or Package size型号名称或尺寸: (mm)
How many connections (pads) 焊盘数量:4 or 2
Tolerance: (±ppm).调整频差
The maximum acceptable deviation from the required frequency of oscillation, when at 25°C.
在25°C时,最大可接受的振荡频率偏差
Stability频率稳定度: (±ppm)
The maximum frequency deviation across the temperature range, referenced to the frequency at 25°C (Tolerance).
以25°C频率为参考,温度范围内的最大频率偏差(容差)
Temperature Range工作温度范围: (°C)
The temperature range over which the stability will be within specification.
稳定性在规范范围内的温度范围
Load Capacitance负载电容: (pF)
The combined capacitance presented to the crystal by the PCB. Including any stray capacitance.
PCB向晶体呈现的总电容,包括任何杂散电容
For MHz frequencies
Overtone Order: The number of physical oscillations within the quartz. In most cases, this will be fundamental.
MHz晶体振荡模式:基频还是泛音?在大多数情况下,为基频振荡模式。
