SMD石英晶體濾波器是一種窄頻的帶通濾波器。由於晶體的高Q質特性，其帶通的頻寬較一般陶瓷濾波器狹窄，且能夠通過多組的濾波器讓通過的頻寬更精確。為了因應手持裝置的尺寸PCB打件的方便性，石英晶體濾波器也有提供SMD小型化的包裝。通常應用在低頻的通訊設備上，如對講機、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 |
