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
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