China Electronics Technology Group Corporation
No.26 Research Institute
297.5MHz SAW Filter
35MHz Bandwidth
Part Number:
LB297DS01
www.sipatsaw.com
SIPAT Co., Ltd.
Specifications
Parameter
Center Frequency
Insertion Loss
1 dB Bandwidth
3 dB Bandwidth
35 dB Bandwidth
Passband Variation
Ultimate Rejection(f0
±
35MHz)
Group Delay Variation
Subatrate Material
Ambient Temperature
Package Size
°C
Unit
MHz
dB
MHz
MHz
MHz
dB
Minimum
Typical
297.5
12.5
Maximum
14
35
37.3
38.9
44.2
0.6
67
dB
nsec
35
40
60
YZ
25
SMD0705A (7x5x1.6mm
3
)
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
C1
C2
L1=39nH
C1=10pF
L2=27nH
C2=12pF
Source/Load Impedance=50 ohm
Notes - Component values may change depending
on board layout.
SIPAT Co., Ltd.
( CETC No. 26 Research Institute )
Nanping Huayuan Road No. 14
Chongqing, China, 400060
Part Number
Rev. Date
Rev.
LB297DS01
2005-6-27
4.0
Page
1/3
Phone: +86-23-62920684
Fax: +86-23-62805284
www.sipatsaw.com / sawmkt@sipat.com
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