EPSON爱普生石英晶体Q22FA1280048500等效电路与谐振频率和石英振荡器原理
EPSON爱普生石英晶体Q22FA1280048500等效电路与谐振频率和石英振荡器原理
石英晶体等效电路
当石英晶体不振动时,可等效为一个平板电容C0,称为静态电容；其值决定于晶片的几何尺寸和电极面积,一般为几到几十皮法.当晶片产生振动时,进口晶振代理商机械振动的惯性等效为电感L,其值为几毫亨到几十亨.晶片的弹性等效为电容C,其值仅为0.01到01pf,因此C《C0.晶片的摩擦损耗等效为电阻R,其值约为100欧,理想情况下R=0.当等效电路中的L,R,C支路产生串联谐振时,该支路呈纯阻性,谐振频率等效电阻为R.
EPSON爱普生石英晶振,Q22FA1280048500石英晶体谐振器
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
Q22FA1280047000
2 x 1.6 x 0.5mm
FA-128
26.000000 MHz
12 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280047100
2 x 1.6 x 0.5mm
FA-128
33.330000 MHz
7 pF
+/-30 ppm
+/-30 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280047300
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
6 pF
+/-30 ppm
+/-20 ppm
-40 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280047600
2 x 1.6 x 0.5mm
FA-128
27.120000 MHz
8 pF
+/-15 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280047900
2 x 1.6 x 0.5mm
FA-128
48.000000 MHz
8 pF
+/-50 ppm
+/-30 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280048000
2 x 1.6 x 0.5mm
FA-128
28.636300 MHz
6 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280048400
2 x 1.6 x 0.5mm
FA-128
48.000000 MHz
6 pF
+/-10 ppm
+/-20 ppm
-20 to +70 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280048500
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
20 pF
+/-30 ppm
+/-30 ppm
-20 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280048700
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
99 pF
+/-30 ppm
+/-30 ppm
-20 to +75 °C
≤ 200 Ω
≤ 100 µW
Q22FA1280048900
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
12 pF
+/-10 ppm
+/-10 ppm
-20 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280049500
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
6 pF
+/-10 ppm
+/-50 ppm
-40 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280049700
2 x 1.6 x 0.5mm
FA-128
52.000000 MHz
6.7 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280049900
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
10 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280050200
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
6 pF
+/-20 ppm
+/-30 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280050600
2 x 1.6 x 0.5mm
FA-128
38.400000 MHz
12 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280050700
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
9 pF
+/-10 ppm
+/-15 ppm
-30 to +85 °C
≤ 200 Ω
≤ 100 µW
Q22FA1280051300
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
10 pF
+/-30 ppm
+/-30 ppm
-40 to +85 °C
≤ 200 Ω
≤ 100 µW
Q22FA1280051400
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
12 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280051700
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
6 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280051900
2 x 1.6 x 0.5mm
FA-128
52.000000 MHz
8 pF
+/-10 ppm
+/-12 ppm
-30 to +85 °C
≤ 60 Ω
≤ 100 µW
Q22FA1280052600
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
8.5 pF
+/-9 ppm
+/-9 ppm
-10 to +70 °C
≤ 80 Ω
≤ 100 µW
Q22FA1280052900
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
6 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 200 Ω
≤ 100 µW
Q22FA1280053000
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
10 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 50 Ω
≤ 100 µW
Q22FA1280053100
2 x 1.6 x 0.5mm
FA-128
50.000000 MHz
10 pF
+/-15 ppm
+/-15 ppm
-40 to +85 °C
≤ 60 Ω
≤ 100 µW
石英振荡器原理
若在晶片的两个极板间加一电场,会使晶体产生机械变形；反之,若在极板间施加机械力,又会在相应的方向上产生电场,这种现象称为压电效应.如在极板间所加的是交变电压,就会产生机械变形振动,同时机械变形振动又会产生交变电场.一般来说,无源贴片晶振这种机械振动的振幅是比较小的,其振动频率则是很稳定的.但当外加交变电压的频率与晶片的固有频率（决定于晶片的尺寸）相等时,机械振动的幅度将急剧增加,这种现象称为压电谐振,因此石英晶体又称为石英晶体谐振器.
EPSON爱普生石英晶振,Q22FA1280048500石英晶体谐振器
