SMD石英晶体滤波器是一种窄频的带通滤波器。由于晶体的高Q质特性，其带通的频宽较一般陶瓷滤波器狭窄，且能够通过多组的滤波器让通过的频宽更精确。为了因应手持装置的尺寸PCB打件的方便性，石英晶体滤波器也有提供SMD小型化的包装。通常应用在低频的通讯设备上，如对讲机、基地台等。
SMD Type MCF (Monolithic Crystal Filters) AGMCF-SF7050
Features:
- Small size, light weight.
- Wide frequency range.
- Seam type.
12.5kHz Channel Spacing
|
Type |
Freq. |
Poles |
Pass Band Width |
Stop Band Width |
Ripple |
Loss |
||
|
dB |
kHz |
dB |
kHz |
dB |
dB |
|||
|
21R08A |
21.4 MHz |
2 |
3 |
± 3.75 kHz |
20 |
± 18 kHz |
0.5 |
1.5 |
|
45R08A |
45.0MHz |
2 |
3 |
± 3.75 kHz |
10 |
± 12.5 kHz |
1.0 |
2.5 |
25.0kHz Channel Spacing
|
Type |
Freq. |
Poles |
Pass Band Width |
Stop Band Width |
Ripple |
Loss |
||
|
dB |
kHz |
dB |
kHz |
dB |
dB |
|||
|
21R15A |
21.4 MHz |
2 |
3 |
± 7.5 kHz |
18 |
± 25 kHz |
0.5 |
1.5 |
|
45R15A |
45.0 MHz |
2 |
3 |
± 7.5 kHz |
15 |
± 25 kHz |
1.0 |
2.0 |
50.0 kHz Channel Spacing
|
Type |
Freq. |
Poles |
Pass Band Width |
Stop Band Width |
Ripple |
Loss |
||
|
dB |
kHz |
dB |
kHz |
dB |
dB |
|||
|
21R30A |
21.4 MHz |
2 |
3 |
± 15 kHz |
15 |
± 45 kHz |
0.5 |
1.5 |
|
45R30A |
45.0 MHz |
2 |
3 |
± 15 kHz |
15 |
± 50 kHz |
1.0 |
2.0 |
