LTWC455E 455Khz Flat GDT Power Line Noise Filter

The specification shall cover the characteristics of four leads SMD ceramic filter with 455KHz in middle-frequency circuit of communication equipment.

1.    ELECTRONICAL  SPECIFICATIONS

A. CENTRE FREQUENCY(f.)    :       455KHz±1.0KHz.Max.

B. BAND WIDTH AT 3dB        :       ±6.5KHzMin(TO 455KHz)

C. BAND WIDTH AT 50dB       :       ±15KHzMin(TO 455KHz)

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.±6.5KHz)

H: INSERTION LOSS           :       5.0dBMax.(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 .