
Phone: + 86-23-62920684 Fax: + 86-23-62805284 www.sipatsaw.com / sawmkt@sipat.com
Part Number
LB140DS21
Rev. Date
2005-5-24
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 SAW Filter
32.5MHz Bandwidth
Part Number: LB140DS21
Specifications
Parameter
Unit
Minimum
Typical
Maximum
Center Frequency
Insertion Loss
MHz
139.75
140
140.25
dB
-
13.5
15
1 dB Bandwidth
3 dB Bandwidth
MHz
31
32.5
-
MHz
32
33.5
-
40 dB Bandwidth
MHz
-
37.6
40
Phase Linearity
(f
0
±12.9MHz)
deg
-
4
6
Passband Variation
dB
-
0.8
1
Group delay variation
(f
0
±12.9MHz)
nsec
-
70
100
Ultimate Rejection
dB
40
43
-
Absolute delay
usec
-
0.96
YZ
-
Subatrate Material
Ambient Temperature
°C
25
Package Size
Notes:
1. All specifications are based on the test circuit shown
SMD1365
(13.3 x 6.5 mm Nominal Footprint
)
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= 10+ 82nH L2= 82+ 18nH
L3= 180nH L4= 220nH
Source/ Load I mpedance= 50 ohm
Notes - Component values may change depending
on board layout.