All specifications are based on the test circuit shown below
In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
Electrical margin has been built into the design to account for the variations due to manufacturing tolerances
The attenuation measurements are referenced to average insertion loss over passband
This is the optimum impedance in order to achieve the performance shown
Test Circuit:
Actual matching values may vary due to PCB layout and parasitics
10
Ω
110nH 27nH
10
4
82nH
50Ω
120nH
6.8Ω
50
Ω
Single-ended
50Ω
82nH
1,2,3,5,6
7,8,9,11,12
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 2 of 5
Data Sheet
Part Number 855915
249.6 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 3 of 5
Data Sheet
Actual matching values may vary due to PCB layout and parasitics
10
Ω
110nH 27nH
10
4
82nH
Part Number 855915
249.6 MHz SAW Filter
Matching Schematics
120nH
6.8Ω
50
Ω
Single-ended
50Ω
82nH
1,2,3,5,6
7,8,9,11,12
50Ω
Marking
1.34
PCB Footprint
.99
.28
1.34
.28
Date code
ID dot
SAWTEK
855915
XXXXXX
5.71
.99
7.21
The date code consists of: day of the current year (Julian,
3 digits), last digit of the year (1 digit) and hour (2 digits)
This footprint represents a recommendation only
Dimensions shown are nominal in millimeters
Tape and Reel
2.7
16.8
Ø330
ID dot
0.3
2.0
4.0
Ø1.5
A
1.75
7.5
7.3
16.0
Ø102
Direction of travel
Ø20.2
Ø13.0
2.0
2.2
Section A-A
5.8
8.0
Ø1.5
A
Dimensions shown are nominal in millimeters
Packaging quantity: 3000 units/reel
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 4 of 5
Data Sheet
Parameter
Operating Temperature Range
Storage Temperature Range
Input Power
Part Number 855915
249.6 MHz SAW Filter
Maximum Ratings
Symbol
T
T
stg
P
in
Minimum
-10
-40
-
Maximum
+80
+85
+15
Unit
C
C
dBm
o
o
Warnings
•
•
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips
S-Parameters
Qualification Flowchart
Soldering Profile
Other Technical Information
Sawtek’s liability is limited only to the Surface Acoustic Wave (SAW) component(s) described in this data sheet. Sawtek does not accept any liability for
applications, processes, circuits or assemblies which are implemented using any Sawtek component described in this data sheet.
空分复用 (SDM) MIMO 处理可显著提高频谱效率，进而大幅增加无线通信系统的容量。空分复用 MIMO 通信系统作为一种能够大幅提升无线系统容量和连接可靠性的手段，近来吸引了人们的广泛关注。 MIMO 无线系统最佳硬判决检测方式是最大似然 (ML) 检测器。ML 检测因为比特误码率 (BER)性能出众，非常受欢迎。不过，直接实施的复杂性会随着天线和调制方案的增加呈指数级增强，使...[详细]
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