Q22FA1280041300爱普生石英晶体压电常数与表面电荷计算
Q22FA1280041300爱普生石英晶体压电常数与表面电荷计算
从石英晶体上切下平行六面体----晶体切片,使它的晶面分别平行于X,Y,Z轴.当晶体受到X方向压缩应力T1-N/m2作用时,晶片将产生厚度变形,在垂直于X方向上产生的电荷密度与应力成正比.
当石英晶体受到沿X方向的压力作用时,爱普生晶振晶体沿X方向产生压缩变形,正负离子的相对位置随之变动,正负电荷中心不再重合,电偶极矩在X轴方向的分量为P1+P2+P3>0,在X轴在正方向的晶体表面上出现正电荷.其它轴为0.称为"纵向压电效应"Q22FA1280041300晶振,爱普生石英晶体
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
Q22FA1280039600
2 x 1.6 x 0.5mm
FA-128
40.000000 MHz
10 pF
+/-10 ppm
+/-10 ppm
-30 to +85 °C
≤ 60 Ω
Q22FA1280039800
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
8 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 80 Ω
Q22FA1280040000
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
8 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 200 Ω
Q22FA1280040100
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
9 pF
+/-30 ppm
+/-30 ppm
-30 to +80 °C
≤ 60 Ω
Q22FA1280040500
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
12 pF
+/-30 ppm
+/-30 ppm
-20 to +75 °C
≤ 200 Ω
Q22FA1280041300
2 x 1.6 x 0.5mm
FA-128
27.000000 MHz
20 pF
+/-30 ppm
+/-30 ppm
-40 to +85 °C
≤ 60 Ω
Q22FA1280041600
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
22 pF
+/-30 ppm
+/-30 ppm
-30 to +85 °C
≤ 200 Ω
Q22FA1280041800
2 x 1.6 x 0.5mm
FA-128
52.000000 MHz
8 pF
+/-30 ppm
+/-30 ppm
-30 to +85 °C
≤ 60 Ω
Q22FA1280042000
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
8 pF
+/-30 ppm
+/-30 ppm
-20 to +75 °C
≤ 80 Ω
Q22FA1280042300
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
8 pF
+/-15 ppm
+/-15 ppm
-20 to +75 °C
≤ 200 Ω
Q22FA1280043600
2 x 1.6 x 0.5mm
FA-128
37.400000 MHz
17 pF
+/-10 ppm
+/-10 ppm
-30 to +85 °C
≤ 60 Ω
Q22FA1280043800
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
6 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
Q22FA1280044100
2 x 1.6 x 0.5mm
FA-128
20.000000 MHz
8 pF
+/-30 ppm
+/-30 ppm
-40 to +85 °C
≤ 100 Ω
Q22FA1280044200
2 x 1.6 x 0.5mm
FA-128
20.000000 MHz
12.5 pF
+/-20 ppm
+/-10 ppm
-20 to +85 °C
≤ 100 Ω
Q22FA1280045000
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
6 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 80 Ω
Q22FA1280045100
2 x 1.6 x 0.5mm
FA-128
25.000000 MHz
6 pF
+/-30 ppm
+/-30 ppm
-40 to +85 °C
≤ 80 Ω
Q22FA1280045200
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
8 pF
+/-10 ppm
+/-22 ppm
-40 to +105 °C
≤ 60 Ω
Q22FA1280045300
2 x 1.6 x 0.5mm
FA-128
32.000000 MHz
8 pF
+/-9 ppm
+/-21 ppm
-40 to +105 °C
≤ 60 Ω
Q22FA1280045400
2 x 1.6 x 0.5mm
FA-128
31.250000 MHz
10 pF
+/-50 ppm
+/-30 ppm
-40 to +85 °C
≤ 60 Ω
Q22FA1280045800
2 x 1.6 x 0.5mm
FA-128
16.000000 MHz
16 pF
+/-10 ppm
+/-10 ppm
-20 to +70 °C
≤ 200 Ω
Q22FA1280046100
2 x 1.6 x 0.5mm
FA-128
26.000000 MHz
11 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 60 Ω
Q22FA1280046300
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
7 pF
+/-10 ppm
+/-15 ppm
-40 to +85 °C
≤ 60 Ω
Q22FA1280046700
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
8 pF
+/-10 ppm
+/-20 ppm
-40 to +85 °C
≤ 60 Ω
Q22FA1280046800
2 x 1.6 x 0.5mm
FA-128
24.000000 MHz
9 pF
+/-10 ppm
+/-10 ppm
-20 to +75 °C
≤ 80 Ω
Q22FA1280046900
2 x 1.6 x 0.5mm
FA-128
48.000000 MHz
8 pF
+/-10 ppm
+/-20 ppm
-20 to +70 °C
≤ 60 Ω
为直观起见,将石英沿Z方向投影,压电效应机理
当未受到力作用时,正负离子硅与氧正好分布在正六边形的顶角上,形成3个大小相等、互成120度的电偶矩P1,P2,P3.P=ql,q为电荷量,l为正负电荷之间距离.进口晶振电偶极矩方向为负电荷指向正电荷.此时正负电荷中心重合,电偶极矩的矢量和等于零.这时晶体表面不产生电荷,石英晶体从整体上是呈电中性的.
当石英晶体受到没Y方向作用的压力作用时,电偶极矩在X方向的分量小于0,晶体表面正电荷,其它方向为0.称为"横向压电效应".Q22FA1280041300晶振,爱普生石英晶体
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