China Electronics Technology Group Corporation
No.26 Research Institute
70MHz SAW Filter
4MHz Bandwidth
Part Number: LBT70A39
www.sipatsaw.com
SIPAT Co., Ltd.
Specifications
Parameter
Center Frequency
Insertion Loss
1 dB Bandwidth
3 dB Bandwidth
35 dB Bandwidth
40 dB Bandwidth
Passband Variation
Absolute Delay
Ultimate Rejection(Over f0±4MHz)
Material Temperature coefficient
Ambient Temperature
Package Size
Unit
MHz
dB
MHz
MHz
MHz
MHz
dB
usec
Minimum
69.9
-
-
4.1
-
-
-
-
50
Typical
70
26
3.92
4.16
4.87
4.91
0.9
3.97
58
-1.26
25
Maximum
70.1
28.5
-
-
4.9
-
1
-
-
dB
KHz/°C
°C
DIP3512 (35.0x12.8x4.7mm3)
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
C2
OUTPUT
50
Ω
L1=150nH L2=56nH
C1=82pF
C2=47pF
Source/Load Impedance=50 ohm
C1
L2
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
Ver.
LBT70A39
2007-3-27
1.0
Page
1/4
Phone: +86-23-62808818
Fax: +86-23-62805284
www.sipatsaw.com / sawmkt@sipat.com