RF1238(2008) 데이터 시트보기 (PDF) - RF Monolithics, Inc

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RF1238
(Rev.:2008)

318.0 MHz SAW Filter

RF Monolithics, Inc 

Absolute Maximum Ratings

Rating

Incident RF Power

DC Voltage Between Any Two Pins (Observe ESD Precautions)

Case Temperature5

Value

+13

±30

-40 to +85

Units

dBm

VDC

°C

Typical Filter Response

Typical filter responses are shown below. The actual response is dependent on external impedance matching and circuit layout. Illustrated frequencies and

minimum rejection for LO and IMAGE are shown only for superhet receivers with 10.7 MHz IF.

.

0

dB

-10

LO

-20

-30

-40 Image

-50

-60

-70

-80

5 MHz/div

Frequency

Electrical Connections

Pin

Connection

1 Input or Output

2 Output or Input

3 Case Ground

Bottom View

Pin 1

Pin 2

Pin 3

Typical Test Circuit

From 50Ω

Network

Analyzer

L

1

C

L

2

3

C

To 50Ω

Network

Analyzer

0

dB

-1

-2

-3

-4

Minimum 3dB

Passband

-5

at 25oC

-6

-7

-8

100 KHz/div

Frequency

Case Design

B

A

Dimensions

A

B

C

D

E

F

G

H

J

C

G

H

F

E

D

(3 places)

J

(2 places)

45°

Millimeters

Min

Max

9.40

3.18

2.50

3.50

0.46 Nominal

5.08 Nominal

2.54 Nominal

2.54 Nominal

1.02

1.40

Inches

Min

Max

0.370

0.125

0.098

0.138

0.018 Nominal

0.200 Nominal

0.100 Nominal

0.100 Nominal

0.040

0.055

www.RFM.com E-mail: info@rfm.com

©2008 by RF Monolithics, Inc.

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RF1238 - 3/21/08

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