China Electronics Technology Group Corporation
No.26 Research Institute
140MHz Low-loss SAW Filter
0.55MHz Bandwidth
Part Number:
LB140DS22
www.sipatsaw.com
SIPAT Co., Ltd.
Specifications
Parameter
Center Frequency
Insertion Loss
1 dB Bandwidth
3 dB Bandwidth
35 dB Bandwidth
Passband Variation
Absolute Delay
Phase Linearity
(f0
±
250KHz)
Group Delay Variation
(f0
±
250KHz)
Ultimate Rejection
f0
±
2.5MHz
f0
±
20MHz
Subatrate Material
Ambient Temperature
Package Size
°C
dB
dB
37
40
41
45
Quartz
25
SF－26
-
-
Unit
MHz
dB
MHz
MHz
MHz
dB
usec
Minimum
139.96
-
0.48
-
-
-
-
-
Typical
140
10.2
0.55
0.86
1.98
0.3
1.88
0.8
Maximum
140.04
12
-
-
2.10
0.6
-
-
deg
nsec
-
80
200
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
L1=82nH
C1=56pF
C2
L2=100nH
C2=47pF
C1
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.
LB140DS22
2005-4-26
1.0
Page
1/3
Phone: +86-23-62920684
Fax: +86-23-62805284
www.sipatsaw.com / sawmkt@sipat.com
SIPAT [ SIPAT Co,Ltd ]
