QF21.4-12000

The QF21.4-12000 is designed as crystal fiflter.

QF21.4-12000 has three applications. The first one is 6 pol filter. The next one is i.f.- filter. The last one is it would be used in mobile and stationary transceivers. That are all the main applications.

Some limiting values of QF21.4-12000 have been concluded into several points as follow. The first one is about its center frequency which would be 21.4 MHz. The next one is about its insertion loss which would be less than 9.0 dB. The next one is about its pass band at 3.0 dB which would be larger than 60.00 MHz. The next one is about its ripple in pass band at fo ± 45.00 kHz which would be less than 1.5dB. The next one is about its stop band attenuation at fo - 300 kHz which would be larger than 60 dB and at fo + 300 kHz it would be larger than 40 dB and at fo ± 400 kHz it which would be larger than 50dB. The next one is about its alternate attenuation which would be larger than except spurious. The next one is about its IP3 at fo±200kHz and fo±400kHz which would be larger than 32.5dBm. The next one is about its terminating impedance Z which means R1 || C1 would be 50 || 0 ohm/pF and R2 || C2 would be 50 || 0 ohm/pF. The next one is about its operating temperature range which would be from -20 to +70°C. That are all the main specifications above.

Also some introduction about QF21.4-12000's pin connection. The first one is about its pin 1 which would be input. The next one is about its pin 2 which would be ground input. The next one is about its pin 3 which would be output. The next one is about its pin 4 which would be ground-output. That are all the important specifications above. And so on. If you have any question or suggestion or want to know more information about it please contact us for details.