Phone: +86-23-62808818

Fax: +86-23-62805284

www.sipatsaw.com / sawmkt@sipat.com

Part Number

UE280

Rev. Date

2006-5-23

SIPAT Co., Ltd.

( CETC No. 26 Research Institute )

Nanping Huayuan Road No. 14

Chongqing, China, 400060

Rev.

1.0

Page 1/3

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280MHz SAW Filter

11MHz Bandwidth

Part Number: UE280

Specifications

Parameter

Unit

Minimum

Typical

Maximum

Center Frequency

MHz

279

280

281

Insertion Loss

dB

-

2.4

4.5

1 dB Bandwidth

MHz

8

9.6

-

3 dB Bandwidth

MHz

10

11

-

40 dB Bandwidth

MHz

-

30

35

Passband Variation

dB

-

0.5

1

Ultimate Rejection

dB

50

53

-

Ultimate Rejection

dB

50

56

-

Material Temperature coefficient

KHz/°C

-22.96

Ambient Temperature

°C

25

Package Size

F-11

Notes:

1. All specifications are based on the test circuit shown

2. In production, devices will be tested at room temperature to a guardbanded specification to ensure

electrical compliance over temperature

3. Electrical margin has been built into the design to account for the variations due to temperature drift

and manufacturing tolerances

4. This is the optimum impedance in order to achieve the performance show

Matching Configuration

L1=L2=33nH

C1=2.8pF C2=2.8pF

Source/Load Impedance=50 ohm

Notes - Component values may change depending

on board layout.

C1

INPUT

OUTPUT

50Ω

50Ω

L1

L2

C2