CFMA

AM CERAMIC FILTERS WITH MATCHING COIL

August 2005

1

© 2005 TOKO America, Inc.

All Rights Reserved

Printed in USA

CF-319-CFMA

R-LOG0805A

Dimensions

TOKO America, Inc.

1250 Feehanville Drive, Mount Prospect, Illinois 60056

Tel: (847) 297-0070 Fax: (847) 699-7864 Web: http://www.tokoam.com

The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture

of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or

other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.

Frequency Response

Typical Characteristics

Description

• AM IF filters combining matching coil with

CFM2 type in resin case

• Center frequency range: 450 — 470kHz

• Bandwidth at 6dB: 2 — 11kHz

Features

• Can be preset if required

• High selectivity, suited to a wide range of applications

• Low temperature coefficient

• Low spurious response

• Lead-free terminations

Applications

• AM radio-cassettes, AM stereo application sets

• Wireless data communication equipment

STANDARD FILTERS SELECTION GUIDE

Frequency (kHz)

TOKO

Center

Bandwidth

Selectivity

Ripple

Input Level

Part

Frequency

at 6dB

at Fo±9KHz

in Pass Band

for 0.6mV

Note

Number

(kHz)

(kHz)

(dB)

(dB)

Output (dB)

##CFMA-027

450±1.5

5.0 min.

25.0 min.

1.0 max.

78.5±3.0

##CFMA-003

455±2.5

5.0 min.

25.0 min.

1.0 max.

78.5±3.0

##CFMA-050

459±1.5

5.0 min.

25.0 min.

1.0 max.

78.5±3.0

##CFMA-012

460±2.5

5.0 min.

25.0 min.

1.5 max.

78.5±3.0

##CFMA-008

468±2.5

5.0 min.

25.0 min.

1.0 max.

78.5±3.0

##PCFMA-221

450±1.0

9.5 min.

17.0 min.

0.7 max.

87.0±3.0

For AM stereo

application

Unit: mm

CFMA-027

Test Circuit