LTM450W
SERIES
6 ELEMENT CERAMIC FILTER
Ultra small size high selectivity type ceramic
filter for communication use.
FEATURES
• Ultra small size
• 6.3 mm profile
• Broad bandwidth
• RoHS Compliant (Note 7 exemption)
• 6 elements
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PART NUMBER
LTM450BW
LTM450CW
LTM450DW
LTM450EW
LTM450FW
LTM450GW
LTM450HW
LTM450IW
LTM450HTW
LTM450ITW
CENTER
FREQUENCY
(KHz)
450
450
450
450
450
450
450
450
450
450
±2.0
±2.0
±1.5
±1.5
±1.5
±1.5
±1.0
±1.0
±1.0
±1.0
INSERTION
LOSS
(dB) MAX.
4
4
4
6
6
6
6
6
6
6
PASS BAND
RIPPLE
(dB) MAX.
2
2
2
2
2
2
2
2
2
2
6 dB
BANDWIDTH
(KHz) MIN.
±15
±12.5
±10
±7.5
±6
±4.5
±3
±2
±3
±2
50 dB
BANDWIDTH
(dB) MAX.
±30
±24
±20
±15
±12.5
±10
±9
±7.5
±9
±7.5
STOP BAND ATT.
±100KHZ
(dB) MIN.
45
45
45
45
45
45
55
55
60
60
INPUT / OUTPUT
IMPEDANCE
(Ω)
1500
1500
1500
1500
2000
2000
2000
2000
2000
2000
PACKAGE DIMENSIONS (mm)
9.5
6.4
1
2
LTM
3
4
5
6.3
Rg
RF
V.M.
R2
S.S.G.
2.2
Rg+R1=R2=input/output impedance
7.1
Connection
3
4
5
1 Input
2 Output
Figure 2) LTM450W – Measuring Circuit
4.3
3 Ground
4 Ground
5 Ground
0
10
LTM450BW
LTM450EW
1
2
Attenuation (dB)
20
30
40
50
LTM450HW
7.1
2.6
2.9
Figure 1) LTM450W – Front, Side and Bottom views
60
410 420 430 440 450 460 470 480 490 500
Note: To avoid potential problems, connect the output to an IF amplifier
through a DC cut capacitor.
Avoid applying a direct current to output end of the ceramic filters (between
|
and
y➂{).
Frequency (KHz)
Figure 3) LTM450W – Characteristics
ECS, INC. INTERNATIONAL
1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM
CERAMIC FILTERS
79
CERAMIC FILTERS
PCB Design
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