Ceramic Filters (CERAFIL

r) for Communications Equipment

CERAFIL

r Plastic Case Group Delay Flat Type CFWLA_Y Series

CFWLA_Y series are high selectivity ceramic filters,

which consist of 6 ceramic elements connected in a

ladder form.

They are most suitable for digital communications

and mobile telephones because of their improved

GDT characteristics.

c Features

1. High selectivity

2. A variety of bandwidths are available

3. Excellent GDT characteristics are available within

pass bandwidth.

4. Easily mounted on a printed circuit board

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

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

0.15

2.3±0.5

2.0±0.3

2.9±0.3

11.0±0.5

MARKING

EIAJ

CODE

1.2±0.5

(1)

(2)

(4) (3)

(5)

0.6±0.1

0.8±0.1

2.6±0.3

Connection

(1): Input

(2)(3)(4): Ground

(5): Output

(in mm)

2.9—0.3

2.9±0.3

Part Number

Center

Frequency (fo)

(kHz)

6dB

Bandwidth

(kHz)

Stop

Bandwidth

(kHz)

Stop Band

Attenuation

(dB)

Insertion Loss

(dB)

GDT Deviation

(µs)

Input/Output

Impedance

(ohm)

CFWLA455KB4Y-B0

455

±1.5kHz

fn±15.0

min.

fn±30.0 max.

[within 50dB]

40 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

30.0 max.

[within fn±10kHz]

1500

CFWLA455KC4Y-B0

455

±1.5kHz

fn±12.5

min.

fn±27.5 max.

[within 50dB]

40 min.

[within fn±100kHz]

7.0 max.

[at minimum loss point]

30.0 max.

[within fn±8kHz]

1500

CFWLA455KD1Y-B0

455

±1.0kHz

fn±10.0

min.

fn±25.0 max.

[within 50dB]

40 min.

[within fn±100kHz]

8.0 max.

[at minimum loss point]

30.0 max.

[within fn±7kHz]

1500

CFWLA455KE1Y-B0

455

±1.0kHz

fn±7.5

min.

fn±20.0 max.

[within 50dB]

40 min.

[within fn±100kHz]

9.0 max.

[at minimum loss point]

30.0 max.

[within fn±5kHz]

1500

CFWLA455KF1Y-B0

455

±1.0kHz

fn±6.0

min.

fn±17.5 max.

[within 50dB]

40 min.

[within fn±100kHz]

10.0 max.

[at minimum loss point]

40.0 max.

[within fn±4kHz]

2000

CFWLA455KG1Y-B0

455

±1.0kHz

fn±4.5

min.

fn±15.0 max.

[within 50dB]

40 min.

[within fn±100kHz]

11.0 max.

[at minimum loss point]

40.0 max.

[within fn±3kHz]

2000

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

(fn) means nominal center frequency 455kHz.

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

R2

E2

RF Voltmeter

Connection

(1): Input

(5): Output

(2)(3)(4): Ground

Rg

S.S.G.

0dBm

(1) (2) (3) (4)

(5)

Rg+R1=R2=Input/Output Impedance

c Test Circuit

P05E.pdf

Nov.24,2011

45

• 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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