LTU455I2 参数 Datasheet PDF下载

Specify

Ceramic Filter LTW33 Series

450 kHz & 455kHz

Ceramic Filters

7

11.3

2.9 2.9 2.6

Pin Connections

4

5

3

2

1

4.3

33-455D

2.0

1 = Input

2 = Ground

3 = Ground

4 = Ground

5 = Output

To take the best advantage of the safety feature of ceramic filters, connect output to anIF amplifier through a DC cut capacitor.

Avoid directly applying DC to output end of ceramic filters (Between 5 & 2,3,4)

FEATURES

High Selectivity

Low Cost

Wide Range of bandwidths Available

Industry Standard Outline

SPECIFICATION

Insertion

Pass Band

Part

Centre

Loss

Ripple

Numb er

Freq (M Hz)

(dB Max)

(dB Max)

LTW33-455B

455 +/ -2.0

4

2

LTW33-455C

455 +/ -2.0

4

2

LTW33-455D

455 +/ -1.5

4

2

LTW33-455E

Q U

455 +/ -1.5

C H A R

6

C T E R I S T I C

2

F R E

E N C Y

A

LTW33-455F

455 +/ -1.5

6

2

LTW33-455G

455 +/ -1.5

6

2

LTW33-455H

455 +/ -1.0

6

2

LTW33-455I

455 +/ -1.0

6

2

LTW33-455HT

455 +/ -1.0

6

2

Frequency Characteristics

6 dB

Bandwidth

(kHz Min)

+/-15.0

+/-12.5

+/-10.0

+/- 7.5

S

+/- 6.0

+/- 4.5

+/- 3.0

+/- 2.0

+/- 3.0

APPLICATIONS

Communications Equipment

40 dB

Bandwidth

(kHz Min)

+/ -30.0

+/ -24.0

+/ -20.0

+/-15.0

+/-12.5

+/-10.0

+/- 9.0

+/- 7.5

+/- 9.0

Stopband

Att. +/ -100kHz

(dB M in )

35

35

35

35

35

35

35

35

60

Input/Output

Impedence ( )

1500

1500

1500

1500

2000

2000

2000

2000

2000

Test Circuit

1

5

R1

0

LTW

2

3

Attenuation (dB)

10

LTW33-455B

LTW33-455D

LTW33-455H

4

20

30

Rg

R2

C

40

50

RF

V.M

S.S.G

60

400

410

420

430

440

450

460

470

480

490

500

Freq (kHz)

Rg+R1+R2=input/Output Impedence

C=10pF (Including strays and input/output

capacitance of RF Voltmeter

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