无源贴片晶振 SMD3225 26MHz 12pF外接电容多少pF？

答：若PCBA杂散电容估算为3~5pF，建议电路中的外接电容器（C1=C2）≈15~18pF。外接电容等值选取（C1=C2），更有利于振荡电路的稳定性。

若外接电容器C1=C2=12pF，建议选择负载电容（CL）≈8pF的无源晶振。

附：无源贴片晶振 SMD3225 26MHz ±10PPM 12PF 主要电气参数如下：

Nominal Frequency: 26.000000 MHz

Frequency Tolerance: ±10 ppm (at 25℃ ±2℃)

Operating Temperature range：-40 ~+85℃

Storage Temperature range: -55~ +125℃

Temperature Characteristics(Frequency Stability): ±10ppm(Operating Temp, Refer 25℃)

Nominal Load Capacitance: 12 pF

Drive Level: 10μw typical.

Series Resistance(Effective Resistance Rr): 40 Ω

Shunt Capacitance: 5 pF

Insulation Resistance : More than 500M ohms at DC 100V

关于无源贴片晶振 SMD3225 26MHz 12pF焊盘说明：