LPBJ SERIES
2 ELEMENT CERAMIC FILTER
The LPBJ Series is a ceramic filter for AM use.
FEATURES
• AM use • IF filter • 2 elements
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PART NUMBER LPB 450J CENTER FREQUENCY (fo) 450 ±2.0 KHz 3dB BANDWIDTH 5.5 ±1.5 KHz SELECTIVITY (±9 KHZ OFF) 17 dB Min. (23) INSERTION LOSS 6 dB Max. (3)
1. Center frequency is available in a range from 450 to 470 KHz. 2. Center frequency shall be defined as the central value of the band at 3dB. 3. Temperatue coefficient of center frequency is based on the center frequency @ 25˚C. ( ) = Typical values
PACKAGE DIMENSIONS (mm)
9.0 ±0.3 2.6 ±0.3
R1 1
3
FILTER
5.0 ±0.3
Rg
2
S.S.G.
E1
R2
RF E2 V.M.
0.15 ±0.03
3.5 ±0.5
R1 + Rg = 3.0 KΩ Insertion Loss = 2xlog(E1/2/E2)
0.7
Connection
1 Input 2 Ground 3 Output
2.5 ±0.2 1 2 3 0.7
Connection
1 Input 2 Ground 3 Output
Figure 2) Measuring Circuit
2.5 ±0.2 2.5 ±0.2
Figure 1) LPBJ Series – Front, Side and Bottom views
ITEM \ TYPE
WINDING SPECIFICATIONS
3 2 4
x—y
85 T
7 x 7 mm IFT y— — 67 T 90 180pF 23 T
x—y
84 T
5 x 5 mm IFT y— — 98 T 65 180pF 33 T
Bottom view
6
1
UNLOADED Qu TUNING CAPACITY
Figure 3) LPBJ – Recommended IFT Specification
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM CERAMIC FILTERS
67
CERAMIC FILTERS
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