China Electronics Technology Group Corporation
No.26 Research Institute
140MHz Low-loss SAW Filter
1.8MHz Bandwidth
Part Number:
LB140DS24
www.sipatsaw.com
SIPAT Co., Ltd.
Specifications
Parameter
Center Frequency
Insertion Loss
1 dB Bandwidth
3 dB Bandwidth
40 dB Bandwidth
Passband Variation
Group delay Variation
（
F
0
± 0.8MHz
）
Phase Linearity
（
F
0
± 0.8MHz
）
Ultimate Rejection
Absolute Delay
Material Temperature coefficient
Ambient Temperature
Package Size
Unit
MHz
dB
MHz
MHz
MHz
dB
nsec
degree
dB
Minimum
139.95
-
1.2
1.6
-
-
-
-
40
-
Typical
140
13
1.28
1.81
3.64
0.4
60
3
42
1.5
Maximum
140.05
14
-
-
3.75
1
-
-
-
-
usec
KHz/°C
°C
0.14
25
SF－26
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=82nH
L3=27nH
L2=68nH
L4=22nH
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.
LB140DS24
2005-7-15
1.0
Page
1/3
Phone: +86-23-62920684
Fax: +86-23-62805284
www.sipatsaw.com / sawmkt@sipat.com
SIPAT [ SIPAT Co,Ltd ]
