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
2x1.6x0.5mm
FA-128
40.000000MHz
10pF
+/-10ppm
+/-10ppm
-30to+85°C
≤60Ω
Q22FA1280039800
2x1.6x0.5mm
FA-128
24.000000MHz
8pF
+/-10ppm
+/-20ppm
-40to+85°C
≤80Ω
Q22FA1280040000
2x1.6x0.5mm
FA-128
16.000000MHz
8pF
+/-10ppm
+/-20ppm
-40to+85°C
≤200Ω
Q22FA1280040100
2x1.6x0.5mm
FA-128
32.000000MHz
9pF
+/-30ppm
+/-30ppm
-30to+80°C
≤60Ω
Q22FA1280040500
2x1.6x0.5mm
FA-128
16.000000MHz
12pF
+/-30ppm
+/-30ppm
-20to+75°C
≤200Ω
Q22FA1280041300
2x1.6x0.5mm
FA-128
27.000000MHz
20pF
+/-30ppm
+/-30ppm
-40to+85°C
≤60Ω
Q22FA1280041600
2x1.6x0.5mm
FA-128
16.000000MHz
22pF
+/-30ppm
+/-30ppm
-30to+85°C
≤200Ω
Q22FA1280041800
2x1.6x0.5mm
FA-128
52.000000MHz
8pF
+/-30ppm
+/-30ppm
-30to+85°C
≤60Ω
Q22FA1280042000
2x1.6x0.5mm
FA-128
24.000000MHz
8pF
+/-30ppm
+/-30ppm
-20to+75°C
≤80Ω
Q22FA1280042300
2x1.6x0.5mm
FA-128
16.000000MHz
8pF
+/-15ppm
+/-15ppm
-20to+75°C
≤200Ω
Q22FA1280043600
2x1.6x0.5mm
FA-128
37.400000MHz
17pF
+/-10ppm
+/-10ppm
-30to+85°C
≤60Ω
Q22FA1280043800
2x1.6x0.5mm
FA-128
32.000000MHz
6pF
+/-10ppm
+/-10ppm
-20to+75°C
≤60Ω
Q22FA1280044100
2x1.6x0.5mm
FA-128
20.000000MHz
8pF
+/-30ppm
+/-30ppm
-40to+85°C
≤100Ω
Q22FA1280044200
2x1.6x0.5mm
FA-128
20.000000MHz
12.5pF
+/-20ppm
+/-10ppm
-20to+85°C
≤100Ω
Q22FA1280045000
2x1.6x0.5mm
FA-128
25.000000MHz
6pF
+/-10ppm
+/-10ppm
-20to+75°C
≤80Ω
Q22FA1280045100
2x1.6x0.5mm
FA-128
25.000000MHz
6pF
+/-30ppm
+/-30ppm
-40to+85°C
≤80Ω
Q22FA1280045200
2x1.6x0.5mm
FA-128
32.000000MHz
8pF
+/-10ppm
+/-22ppm
-40to+105°C
≤60Ω
Q22FA1280045300
2x1.6x0.5mm
FA-128
32.000000MHz
8pF
+/-9ppm
+/-21ppm
-40to+105°C
≤60Ω
Q22FA1280045400
2x1.6x0.5mm
FA-128
31.250000MHz
10pF
+/-50ppm
+/-30ppm
-40to+85°C
≤60Ω
Q22FA1280045800
2x1.6x0.5mm
FA-128
16.000000MHz
16pF
+/-10ppm
+/-10ppm
-20to+70°C
≤200Ω
Q22FA1280046100
2x1.6x0.5mm
FA-128
26.000000MHz
11pF
+/-10ppm
+/-10ppm
-20to+75°C
≤60Ω
Q22FA1280046300
2x1.6x0.5mm
FA-128
24.000000MHz
7pF
+/-10ppm
+/-15ppm
-40to+85°C
≤60Ω
Q22FA1280046700
2x1.6x0.5mm
FA-128
24.000000MHz
8pF
+/-10ppm
+/-20ppm
-40to+85°C
≤60Ω
Q22FA1280046800
2x1.6x0.5mm
FA-128
24.000000MHz
9pF
+/-10ppm
+/-10ppm
-20to+75°C
≤80Ω
Q22FA1280046900
2x1.6x0.5mm
FA-128
48.000000MHz
8pF
+/-10ppm
+/-20ppm
-20to+70°C
≤60Ω
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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