LTM450U Datasheet, PDF (1/1 Pages) ECS, Inc. – 4 ELEMENT CERAMIC FILTER

LTM450U SERIES 4 ELEMENT CERAMIC FILTER
Ultra small size high selectivity type ceramic
filter for communication use.
FEATURES
• Ultra small size
• 6.5 mm profile
• Bandwidths from
4KHz to 30KHz available
• RoHS Compliant (Note 7 exemption)
• 4 elements
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PART NUMBER
CENTER
FREQUENCY
(KHz)
INSERTION
LOSS
(dB) MAX.
PASS BAND
RIPPLE
(dB) MAX.
6 dB
BANDWIDTH
(KHz) MIN.
LTM450BU
LTM450CU
LTM450DU
LTM450EU
LTM450FU
LTM450GU
LTM450HU
LTM450IU
LTM450HTU
LTM450ITU
450 ±2.0
4
450 ±2.0
4
450 ±1.5
4
450 ±1.5
6
450 ±1.5
6
450 ±1.0
6
450 ±1.0
6
450 ±1.0
6
450 ±1.0
6
450 ±1.0
6
2
±15
2
±12.5
2
±10
2
±7.5
2
±6
2
±4.5
2
±3
2
±2
2
±3
2
±2
40 dB
BANDWIDTH
(dB) MAX.
±30
±24
±20
±15
±12.5
±10
±9
±7.5
±9
±7.5
STOP BAND ATT.
±100KHZ
(dB) MIN.
27
27
27
27
27
25
25
25
35
35
INPUT / OUTPUT
IMPEDANCE
(Ω)
1500
1500
1500
1500
2000
2000
2000
2000
2000
2000
PACKAGE DIMENSIONS (mm)
7
7
0.8
INPUT
R1 ¹
OUTPUT
2
LTMU
3
4
Rg
GROUND GROUND
R2
S.S.G.
RF
V.M.
Rg+R1=R2=input/output impedance
2.4 1.8 0.8
1
2
34
4.3
Connection
1 Input
2 Output
3 Ground
4 Ground
2.4 1.8 0.8
Figure 1) LTM450U – Front, Side and Bottom views
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 ➂ and xy).
Figure 2) LTM450U – Measuring Circuit
0
LTM455BU
10
LTM455EU
20
LTM455HU
30
40
50
60
410 420 430 440 450 460 470 480 490 500
Frequency (KHz)
Figure 3) LTM4550U – Characteristics
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX [phone] • WWW.ECSXTAL.COM
CERAMIC FILTERS 78 CERAMIC FILTERS