Ceramic Filters (CERAFIL

r) for Communications Equipment

CERAFIL

r Plastic Case Miniaturized Type CFULB Series

CFULB series ceramic filters are miniature, high-

performance ceramic filters composed of piezoelectric

elements connected in a ladder form.

These filters, only 6.3mm high, are 65% the

volume of conventional types.

They are well suited for miniaturizing various kinds

of communications equipment, pocket pagers, car

radios, cordless telephones and mobile telephones.

c Features

1. Miniature and high selectivity

2. A variety of bandwidths are available

3. Operating temperature range: -20 to +80 (°C)

Storage temperature range: -40 to +85 (°C)

1.8±0.3

2.4±0.3

6.5±0.3

0.8±0.3

0.5±0.1

0.7±0.1

0.7±0.3

(1)

(2)

(3)

(4)

0.15±0.05

Connection

(1): Input

(2): Output

(3)

: Ground

(4)

(in mm)

}

MARKING

EIAJ

CODE

Part Number

Center

Frequency (fo)

(kHz)

6dB

Bandwidth

(kHz)

Stop

Bandwidth

(kHz)

Stop Band

Attenuation

(dB)

Insertion Loss

(dB)

Input/Output

Impedance

(ohm)

CFULB455KB2A-B0

455

±2.0kHz

fn±15.0

min.

fn±30.0 max.

[within 40dB]

27 min.

[within fn±100kHz]

4.0 max.

[at minimum loss point]

1500

CFULB455KC2A-B0

455

±2.0kHz

fn±12.5

min.

fn±24.0 max.

[within 40dB]

27 min.

[within fn±100kHz]

4.0 max.

[at minimum loss point]

1500

CFULB455KD4A-B0

455

±1.5kHz

fn±10.0

min.

fn±20.0 max.

[within 40dB]

27 min.

[within fn±100kHz]

4.0 max.

[at minimum loss point]

1500

CFULB455KE4A-B0

455

±1.5kHz

fn±7.5

min.

fn±15.0 max.

[within 40dB]

27 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

1500

CFULB455KF4A-B0

455

±1.5kHz

fn±6.0

min.

fn±12.5 max.

[within 40dB]

27 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

CFULB455KG1A-B0

455

±1.0kHz

fn±4.5

min.

fn±10.0 max.

[within 40dB]

25 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

CFULB455KH1A-B0

455

±1.0kHz

fn±3.0

min.

fn±9.0 max.

[within 40dB]

35 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

CFULB455KJ1A-B0

455

±1.0kHz

fn±2.0

min.

fn±7.5 max.

[within 40dB]

35 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

Center frequency (fo) defined by the center of 6dB bandwidth.

(fn) means nominal center frequency 455kHz.

CFULB455K_series filters are 4-element ceramic filters and miniature versions of CFULA455K_series.

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.

The order quantity should be an integral multiple of the "Minimum Quantity" shown in package page in this catalog.

E1

R1

Rg

S.S.G.

0dBm

R2

E2

RF Voltmeter

Connection

(1)

(2)

(3)(4)

: Input

: Output

: Ground

(1)

(2)

(3)

(4)

Rg+R1=R2=Input/Output Impedance

c Test Circuit

P05E.pdf

Nov.24,2011

39

• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering.

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