China Electronics Technology Group Corporation
No.26 Research Institute
70MHz IF SAW Filter
5MHz Bandwidth
Part Number: LBT7028S
www.sipatsaw.com
SIPAT Co., Ltd.
Specifications
Parameter
Center Frequency
Insertion Loss
1 dB Bandwidth
3 dB Bandwidth
40 dB Bandwidth
Passband Variation
Absolute Delay
Group Delay Variation(f0±2MHz)
Ultimate Rejection(f0±12MHz)
Material Temperature coefficient
Ambient Temperature
Package Size
Unit
MHz
dB
MHz
MHz
MHz
dB
usec
Minimum
69.9
-
4.7
5.4
-
-
-
-
-
Typical
70
22.6
5.01
5.6
7.8
0.9
1.43
60
36
-1.26
25
SMD13.3*6.5C
Maximum
70.1
25
-
-
8
1
-
150
-
nsec
dB
KHz/°C
°C
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
INPUT
50
Ω
L1
L2
L1=180nH L2=82nH
OUTPUT
50
Ω
Source/Load Impedance=50 ohm
Notes - Component values may change depending
on board layout.
SIPAT Co., Ltd.
( CETC No.26 Research Institute )
#14 Nanping Huayuan Road,
Chongqing, China, 400060
Tel: +86-23-62808818
Part Number
Rev. Date
Ver.
LBT7028S
2008-01-17
1.1
Page
1/4
Fax: +86-23-62805284
www.sipatsaw.com / sawmkt@sipat.com