...

CERAMIC FILTERS FOR AM APPLICATIONS–HIGHLY SELECTIVE CFU SERIES

by user

on
Category: Documents
2

views

Report

Comments

Transcript

CERAMIC FILTERS FOR AM APPLICATIONS–HIGHLY SELECTIVE CFU SERIES
CERAMIC FILTERS
FOR AM APPLICATIONS–HIGHLY SELECTIVE
CFU SERIES
■ The pass bandwidths from 30kHz
to 4kHz are available.
■ Easily mountable onto printed boards
■ Operating temperature range:
–20°C to +80°C
Storage temperature range:
–40°C to +85°C
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
■ High selectivity
DIMENSIONS: mm
CIRCUIT
CHARACTERISTICS
7.0 ± 0.5
R1
8.0 ± 0.5
0.8 ± 0.1
2
1.5 max.
S.S.G.
Rg
4.0 ± 0.5
0.2
0.8 ± 0.3
Sealing
0.6 ± 0.1
2.7 ± 0.3
0.8
2 1 4.3 ± 0.3
3
R2
RF
Voltmeter
Rg+R1=R2=Input/Output Impedance
2.7
3
20
30
CFU
455H2
CFU
455E2
40
50
60
70
1=INPUT
2=GROUND
3=OUTPUT
2 1
3-1.0D.
0
CFU
10 455B2
1 3
Attenuation (dB)
8.0 ± 0.5
420
440
460
480 500
Frequency (kHz)
FILTERS
3.3 ± 0.5 1.2 ± 0.5
SPECIFICATIONS
Part Number
쏒CFU455B2
쏒CFU455C2
쏒CFU455D2
쏒CFU455E2
쏒CFU455F2
쏒CFU455G2
쏒CFU455H2
쏒CFU455I2
CFU455HT
CFU455IT
CFU 455kHz
Nominal Center
Frequency (kHz)
6dB Bandwidth
(kHz) min.
40dB Bandwidth
(kHz) max.
Attenuation
455±100kHz
(dB) min.
455 ± 2
455 ± 2
455 ± 1.5
455 ± 1.5
455 ± 1.5
455 ± 1
455 ± 1
455 ± 1
455 ± 1
455 ± 1
±15
±12.5
±10
±7.5
±6
±4.5
±3
±2
±3
±2
±30
±24
±20
±15
±12.5
±10
±9
±7.5
±9
±7.5
27
27
27
27
27
25
25
25
35
35
Ripple
(dB) max. kHz
Insertion Loss
(dB) max.
Input/Output
Impedance (⍀)
3 (455 ± 10)
4 (455 ± 8)
2 (455 ± 7)
1.5 (455 ± 5)
1.5 (455 ± 4)
1.5 (455 ± 3.0)
2 (455 ± 2.0)
2 (455 ± 1.5)
3 (455 ± 2)
2 (455 ± 1.5)
4
4
4
6
6
6
6
6
6
6
1500
1500
1500
1500
2000
2000
2000
2000
2000
2000
Note: For safety purposes, connect the output of filters to the IF amplifier through a DC blocking capacitor. Avoid applying a direct current to the output of ceramic filters.
PART NUMBERING SYSTEM
CFU
SERIES
455
FREQUENCY
in kHz
B
2
BANDWIDTH
DENOTES ANY
SPECIFIC CHARACTERISTICS
쏒Available as standard through authorized Murata Electronics Distributors.
왖
Applicable in North American market only. 왔Applicable in European market only.
For more detailed information regarding this product line in North America, see Catalog No. P-05-D. To receive additional information on Murata Products call 1-800 -831-9172.
For more detailed information regarding this product line in Europe, see Catalog No. P05E-8.
113
Fly UP