
Phone: + 86-23-62920684 Fax: + 86-23-62805284 www.sipatsaw.com / sawmkt@sipat.com
Part Number
LB140DS25
Rev. Date
2005-7-15
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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140MHz Low-loss SAW Filter
1.75MHz Bandwidth
Part Number: LB140DS25
Specifications
Parameter
Unit
Minimum
Typical
Maximum
Center Frequency
Insertion Loss
MHz
139.95
140
140.05
dB
-
13.8
15
1 dB Bandwidth
MHz
1.15
1.21
-
3 dB Bandwidth
MHz
1.6
1.75
-
40 dB Bandwidth
Passband Variation
MHz
-
3.6
3.7
dB
-
0.4
1
Group delay Variation
(
F
0
± 0.8MHz
)
nsec
-
40
-
Phase Linearity
(
F
0
± 0.8MHz
)
degree
-
1
-
Ultimate Rejection
dB
40
42
-
Absolute Delay
usec
-
1.5
-
Material Temperature coefficient
KHz/°C
0.14
Ambient Temperature
°C
25
Package Size
SMP-53 (13.3 x 6.5 mm Nominal Footprint)
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= 100+ 10nH L2= 100nH
C1= 47pF C2= 47pF
Source/ Load I mpedance= 50 ohm
Notes - Component values may change depending
on board layout.
L2
L1
C1
C2