82

• Center frequency (fo) is available in a range of 450 to 470KHz. The standard tolerance of fo is ±2KHz. For synthesizers and digital indicators, ±1KHz tolerance is also available.

• The LPZ455JL series, with its two directly coupled elements, has a high degree of selectivity. The series features excellent matching characteristics for IFT.

( ) = Typical values

ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM

CERAMIC FILTERS

CERAMIC FILTERS

7.5

2.5 2.5

3.5

Connection

Input

Ground

Output

3

3

2

2

1

1

CERAMIC FILTER

OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS

3dB

SELECTIVITY

SELECTIVITY

INSERTION

PART NUMBER

BANDWIDTH (KHz)

LOSS (dB) MAX.

COMPOSITION

LPU455B - (connected with IFT)

10 ±3

5 (7.5)

3 (5.5)

5 (3)

1 Element with IFT

LPZ455JL - (connected with IFT)

5.5 ±1

18 (20)

18 (20)

7 (3.5)

2 Elements Direct Coupling Type

Figure 1) LPU455B – Front and Side views

7.0

±0.3

Direct Coupled

3

Direct Coupled

4

Ground

5

Connection

Output

6

Ground

2

Input

1

7.0

±0.3

2.5 2.5

3.6

3

2

1

3

2

1

6

5

4

2.5 2.5

Figure 2) LPZ455JL – Front, Side and Bottom views

FEATURES

• AM use

• RoHS Compliant (Note 7 exemption)

PACKAGE DIMENSIONS (mm)

ITEM \ TYPE

LPU

B

LPZ

JL

70 T

115 T

7 T

68 T

84 T

14 T

UNLOADED Qu

105

90

TUNING CAPACITY

180pF

180pF

3

4

2

1

6

WINDING SPECIFICATIONS

Bottom

view

LPU 455B

LPZ 455JL

R1

Rg

GROUND

INPUT

OUTPUT

Rg+R1=R2=input/output impedance

S.S.G.

LPU

RF

V.M.

R2

1

2

3

Figure 4) LPU Series – Measuring Circuit

Figure 3) Recommended IFT Specifications

3K

Rg = 50

Ω

LPZ

S.S.G.

RF

V.M.

3K

1

6

2

3

4

: Input

: Ground

: Direct Coupled

: Output

1

2

3

5

4

6

5

Figure 5) LPZ Series – Measuring Circuit