CFMR
AM CERAMIC FILTERS
Description
鈥?Low profile, compact, 2-element
AM IF filter with high reliability.
鈥?Center frequency range: 450 to 470kHz
鈥?Bandwidth at 6dB: 4 to 10kHz.
Dimensions
Features
鈥?Compact, low profile (height 7.6mm).
鈥?High selectivity, suited for a wide range of applications
鈥?Low spurious response
鈥?Lead-free terminations
Applications
鈥?AM radio cassettes, stereo sets, telecommunications
鈥?Wireless data communication equipment
Unit: mm
Test Circuit
Test Conditions
1. C includes test circuit capacitance.
2. L
1
2.7mH, L
2
1.0mH
3. During testing, when matching coils are used at
input/output sides, connect L
1
and L
2
(dummy)
4. R
1
, R
2
: Input-output impedance
Cs: Stray capacitance
(less than 50pF, including EV)
STANDARD FILTERS SELECTION GUIDE
TYPE CFMR (CERASIZER
廬
)
TOKO
Center
Part
Frequency (Fo)*
Number
(kHz)
##ACFMR-455Z
455鹵1.0
##ACFMR-455AL
455鹵1.0
##ACFMR-455BL
455鹵1.0
##ACFMR-455CL
455鹵1.0
##ACFMR-455DL
455鹵1.0
Bandwidth
at 6dB
(kHz)
4.0鹵1.0
4.0 min.
6.0 min.
8.0 min.
10.0 min.
Selectivity
at Fo鹵9kHz
(dB)
24.0 min.
18.0 min.
16.0 min.
12.0 min.
9.0 min.
Ripple
in Pass Band
(dB)
1.0 max.
1.0 max.
1.0 max.
2.0 max.
2.0 max.
Insertion
Loss
(dB)
7.0 max.
6.0 max.
6.0 max.
6.0 max.
6.0 max.
Input/Output
Impedance
(k惟)
1.0/1.5
1.0/1.5
1.0/2.0
2.0/2.0
2.0/2.0
* Center frequencies 450kHz, 455kHz, 459kHz, 460kHz, 468kHz available. Center frequency tolerance available to 鹵0.5kHz.
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.
TOKO America, Inc.
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864 Web: http://www.tokoam.com
August 2005
漏 2005 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-314-CFMR
R-LOG0805A
1
1
