FILTERS
Attenuation (dB)
FILTERS
CERAMIC FILTERS FOR AM APPLICATIONS–HIGHLY SELECTIVE CFU SERIES
The CFU 455 line of ceramic fi...
Description
Attenuation (dB)
FILTERS
CERAMIC FILTERS FOR AM APPLICATIONS–HIGHLY SELECTIVE CFU SERIES
The CFU 455 line of ceramic filters are 4-element devices connected in ladder form while the CFWS 455 line of ceramic filters contain 6-elements. These compact, highly selective filters are recommended for use in applications ranging from two-way radio to auxiliary filters in high class transceivers. (Also available in 450kHz version.)
FEATURES
s High selectivity
s The pass bandwidths from 30kHz to 4kHz are available.
s Easily mountable onto printed boards s Operating temperature range:
–20°C to +80°C Storage temperature range: –40°C to +85°C
DIMENSIONS: mm
8.0 ± 0.5
7.0 ± 0.5
8.0 ± 0.5 0.8 ± 0.1
0.2 0.8 ± 0.3
Sealing
4.0 ± 0.5
0.6 ± 0.1 2.7 ± 0.3 0.8 2 1 4.3 ± 0.3 3
3-1.0D. 3.3 ± 0.5 1.2 ± 0.5
1.5 max.
2.7 21 3
CIRCUIT
R1 S.S.G.
Rg
13 2
R2
Rg+R1=R2=Input/Output Impedance
1=INPUT 2=GROUND 3=OUTPUT
CHARACTERISTICS
RF Voltmeter
0 CFU 10 455B2 20 CFU 30 455E2
CFU 455H2
40
50
60
70 420 440 460 480 500
Frequency (kHz)
SPECIFICATIONS
Part Number
Nominal Center Frequency (kHz)
6dB Bandwidth 40dB Bandwidth
(kHz) min.
(kHz) max.
Attenuation 455 ±100kHz
(dB) min.
Ripple
Insertion Loss
(dB) max. kHz (dB) max.
CFU455B2
455 ± 2
±15
±30
27 3 (455 ± 10) 4
CFU455C2
455 ± 2
±12.5
±24
27 4 (455 ± 8)
4
CFU455D2
455 ± 1.5
±10
±20
27 2 (455 ± 7)
4
CFU455E2
455 ± 1.5
±7.5
±15
27 1.5 (455 ± 5)
6
CFU455F2
455 ± 1.5
±6
±12.5
27 1.5 (455 ± 4)
6
C...
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