EPSON爱普生晶振Q22FA1280020100串联和并联振荡共振模式不同
EPSON爱普生晶振Q22FA1280020100串联和并联振荡共振模式不同
振荡模式石英晶体提供了两种共振模式,由C1与L1构成的串联共振和由C0、C1与L1构成的并联共振.
频率在30MHz以上（到200MHz）的石英晶体,精工爱普生晶振通常工作于串联共振模式,工作时的阻抗处于最低点,相当于Rs.此种晶体通常标示串联电阻（<100Ω）而非并联负载电容.为了达到高的振荡频率,石英晶体会振荡在它的一个谐波频率上,此谐波频率是基频的整数倍.只使用奇数次谐波,例如3倍、5倍、与7倍的泛音晶体.要达到所要的振荡频率,振荡电路上会加入额外的电容器与电感器,以选择出所需的频率.EPSON爱普生晶振，Q22FA1280020100石英晶体
对于一般的MHz级石英晶体而言,串联共振频率一般会比并联共振频率低若干KHz.频率在30MHz以下的石英晶体,通常工作时的频率处于串联共振频率与并联共振频率之间,日本进口晶振此时石英晶体呈现电感性阻抗.因为外部电路上的电容会把电路的振荡频率拉低一些.在设计石英晶体振荡电路时,也应令电路上的杂散电容与外加电容合计値与晶体厂商使用的负载电容值相同,振荡频率才会准确符合厂商的规格.EPSON爱普生晶振，Q22FA1280020100石英晶体
爱普生晶振编码
长x宽x高
型号
石英晶振频率
负载
频率25°C
频率公差
工作温度范围
ESR最大
驱动电平
Q22FA1280017000
2 x 1.6 x 0.5mm
FA-128
26.000000 MHz
6 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280017400
2 x 1.6 x 0.5mm
FA-128
27.120000 MHz
10 pF
+/-15 ppm
+/-20 ppm
-30 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280018200
2 x 1.6 x 0.5mm
FA-128
27.000000 MHz
12 pF
+/-30 ppm
+/-50 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280018300
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
10 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280018400
2 x 1.6 x 0.5mm
FA-128
27.120000 MHz
10 pF
+/-30 ppm
+/-30 ppm
-30 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280018600
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
18 pF
+/-50 ppm
+/-30 ppm
-20 to +70 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280018700
2 x 1.6 x 0.5mm
FA-128
48.000000 MHz
16 pF
+/-30 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280019100
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
8 pF
+/-10 ppm
+/-10 ppm
-30 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280019700
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
7 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280020100
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
18 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280020200
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
6.7 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280021300
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
10 pF
+/-30 ppm
+/-30 ppm
-40 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280021400
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
10 pF
+/-30 ppm
+/-30 ppm
-40 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280021500
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
10 pF
+/-30 ppm
+/-30 ppm
-20 to +75 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280021800
2 x 1.6 x 0.5mm
FA-128
30.000000 MHz
9 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280021900
2 x 1.6 x 0.5mm
FA-128
30.000000 MHz
6 pF
+/-30 ppm
+/-40 ppm
-30 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280022200
2 x 1.6 x 0.5mm
FA-128
20.000000 MHz
10 pF
+/-30 ppm
+/-30 ppm
-20 to +75 °C
≤ 100 Ω
≤ 100 µW
Q22FA1280022500
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
9 pF
+/-30 ppm
+/-30 ppm
-30 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280022600
2 x 1.6 x 0.5mm
FA-128
26.000000 MHz
8 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280022700
2 x 1.6 x 0.5mm
FA-128
37.400000 MHz
10 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280022900
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
9 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280023000
2 x 1.6 x 0.5mm
FA-128
26.000000 MHz
10 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280023200
2 x 1.6 x 0.5mm
FA-128
20.000000 MHz
9 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 100 Ω
≤ 100 µW
Q22FA1280023300
2 x 1.6 x 0.5mm
FA-128
27.120000 MHz
6 pF
+/-30 ppm
+/-30 ppm
-30 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280023400
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
9 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 200 Ω
≤ 100 µW
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