The specification shall cover the characteristics of ceramic filter with 455KHz .
1. ELECTRONICAL SPECIFICATIONS
A. CENTRE FREQUENCY(f.) : 455KHz±1.0KHz.Max.
B. BAND WIDTH AT 3dB : ±7.5 KHzMin(TO 450KHz)
C. BAND WIDTH AT 40dB : ±15.0KHzMin(TO 450KHz)
D. STOP BAND ATTENUATION : 55dBMin(AT f0 ± 18 to ± 33KHz)
E. STOP BAND ATTENUATION : 50dBMin.(AT f.±100KHz)
F: STOP BAND ATTENUATION : 20dBMin(AT f0 ±0.1 to ±1 MHz)
G: RIPPLE : 3.0dBMax.(AT f.±12.5KHz)
H: INSERTION LOSS : 4.0dBMax.(AT THE SMALLEST LOSS)
I: TEMPRATURE COEFFICIENT
OF CENTER FRENQUENCY : ±50 PPM/℃ MAX.(-20 TO +80 ℃)
J: INPUT/OUPUT IMPEDANCE : 1.5KΩ
NOTE :
A) CENTER FREQUENCY SHALL BE DEFIED AS THE CENTRAL
VALUE OF THE BAND WITH AT 6dB
B) TEMPRATURE COEFFICIENT OF CENTER FREQUENCY SHALL
BE DEFINED AS THE AVERAGE OF THE CENTRAL FREQUECY .
|
Item
|
Specification
|
| Center Frequency |
455±1.0 KHz max |
| (6dB) Bandwidth(6dB) |
±10.0 KHz min |
| (50dB) Selectivity(50dB) |
±20.0KHz max |
| (fo±100KHz) Stop Band Attenuation |
45dB min |
| Ripple |
2.0dB max |
| Insertion Loss |
5.0dB max |
