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CERAFIL r (CERAFIL r 455kHz) for Audio/Visual Equipment
Chip Type SFPKA Series
7.0±0.3
3.0±0.3
SFPKA series for AM use is one of the most
P50E.pdf
Sep.19,2012
recommendable intermediate ?lters, having such
distinctive features as high selectivity, high
stability and adjustment-free operation.
Additionally, its easy matching with IC helps create an
easy circuit design.
1.5±0.3
MARKING
EIAJ
CODE
0.9±0.1
2.0±0.3
c Features
1. The ?lters are mountable by automatic placers
and can be re?ow soldered and withstand
2.0±0.3
(1) (2) (3)
1.5±0.3
1.6±0.3
Connection
(1): Input
(2): Ground
(3): Output
(in mm)
washing.
2. The ?lters are wide bandwidth and high
selectivity, so they are suitable for car radio
and multi-band radio.
Part Number
SFPKA450KH1A-R1
SFPKA450KG1A-R1
Center
Frequency (fo)
(kHz)
450.0 ±1.0kHz
450.0 ±1.0kHz
6dB
Bandwidth
(kHz)
fn±3.0 min.
fn±4.5 min.
Selectivity (-)
(dB)
40 min.[fn-9kHz]
40 min.[fn-10kHz]
Selectivity (+)
(dB)
40 min.[fn+9kHz]
40 min.[fn+10kHz]
Insertion
Loss
(dB)
6.0 max.
6.0 max.
Input/Output
Impedance
(ohm)
2000
1500
Element
4
4
Area of Insertion Loss: at minimum loss point
Center frequency (fo) is de?ned by the center of 6dB bandwidth.
(fn) means nominal center frequency (450kHz).
For safety purposes, connect the output of ?lters to the IF ampli?er through a D.C. blocking capacitor. Avoid applying a direct current to the output of ceramic ?lters.
The order quantity should be an integral multiple of the "Minimum Quantity" shown in the package page.
c Standard Land Pattern Dimensions
c Recommended IFT
6.95
Item
Type
SFPKA
2.475
2.0
Winding Specification
(1)—(2)
(2)—(3)
(4)—(6)
S(3)
(2)
(4)S
(1)
(6)
60T
125T
28T
11
(Bottom view)
No load Qu
40
1.1
Tuning Capacitance
180pF
0.925
2.0
2.0
r
(in mm)
r
c Test Circuit
R1
(1)
(2)
(3)
Rg
E1
R2
E2
RF Voltmeter
S.S.G.
0dBm
38
Rg+R1=R2=Input/Output Impedance
E1: S.S.G. Output Voltage
(1): Input
(2): Ground
(3): Output
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