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參數(shù)資料
| 型號： | LTM45HTU |
| 廠商： | ECS INC INTERNATIONAL |
| 英文描述： | 0.455 MHz, CERAMIC BPF |
| 封裝： | ROHS COMPLIANT PACKAGE-4 |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 277K |
| 代理商： | LTM45HTU |
80
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 913-782-7787 800-237-1041 FAX 913-782-6991 WWW.ECSXTAL.COM
CERAMIC FILTERS
LTM455U SERIES
4 ELEMENT CERAMIC FILTER
2.4 1.8 0.8
7
6.5
4
7
4.3
0.8
4.3
4
3
2
1
Connection
Input
Ground
Output
Ground
3
4
2
1
2.4
1.8 0.8
Figure 1) LTM455U – Front, Side and Bottom views
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
R1
Rg
GROUND
INPUT
OUTPUT
Rg+R1=R2=input/output impedance
S.S.G.
LTMU
RF
V.M.
R2
1
2
3
4
Figure 2) LTM455U – Measuring Circuit
Frequency (KHz)
Attenuation
(dB)
0
10
20
30
40
50
60
410
420
430
440
450
460
470
480
490
500
LTM455BU
LTM455EU
LTM455HU
Figure 3) LTM455U – Characteristics
PACKAGE DIMENSIONS (mm)
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
CENTER
INSERTION
PASS BAND
6 dB
40 dB
STOP BAND ATT.
INPUT / OUTPUT
PART NUMBER
FREQUENCY
LOSS
RIPPLE
BANDWIDTH
±100KHZ
IMPEDANCE
(KHz)
(dB) MAX.
(KHz) MIN.
(dB) MAX.
(dB) MIN.
(
)
LTM455BU
455 ±2.0
4
2
±15
±30
27
1500
LTM455CU
455 ±2.0
4
2
±12.5
±24
27
1500
LTM455DU
455 ±1.5
4
2
±10
±20
27
1500
LTM455EU
455 ±1.5
6
2
±7.5
±15
27
1500
LTM455FU
455 ±1.5
6
2
±6
±12.5
27
2000
LTM455GU
455 ±1.0
6
2
±4.5
±10
25
2000
LTM455HU
455 ±1.0
6
2
±3
±9
25
2000
LTM455IU
455 ±1.0
6
2
±2
±7.5
25
2000
LTM45HTU
455 ±1.0
6
2
±3
±9
35
2000
LTM45ITU
455 ±1.0
6
2
±2
±7.5
35
2000
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 xy).
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