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