Including losses in matching test circuit shown below
Minimum
-
-
-
-
-
35
26
5
5
26
35
42
42
-
-
-
-
-
Typical
225
2.3
3.5
0.5
0.3
45
32
11
13
30
39
45
45
0.9
0.6
0.2
704Ω||332nH
739Ω||359nH
Maximum
-
3.8
5.0
3.2
2.2
-
-
-
-
-
-
-
-
1.8
1.6
1.3
-
-
Unit
MHz
dB
dB
dB p-p
dB p-p
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
µsec
µsec
µsec
Ω
Ω
Amplitude Variation
224.9200 - 225.0800 MHz
224.9325 - 225.0675 MHz
Rejection
(4)
223 - 224.4 MHz
224.4 - 224.6 MHz
224.6 - 224.8 MHz
225.2 - 225.4 MHz
225.4 - 225.6 MHz
225.6 - 227.0 MHz
Out of Band Rejection
10 - 215 MHz
235 - 750 MHz
Group Delay Ripple
224.9200 - 225.0800 MHz
224.9325 - 225.0675 MHz
224.9500 - 225.0500 MHz
Optimal Source Impedance:
(5)
Optimal Load Impedance:
(5)
Notes:
1.
2.
3.
4.
5.
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
Relative to insertion loss at 225 MHz
This is the complex conjugate of the unmatched filter’s impedance resulting in maximum power transfer
Test Circuit:
7pF
2
5
82nH
1
7pF
3,4,7,8
6
7pF
50Ω
7pF
50Ω
Balanced
50Ω
82nH
Subject to change or obsolescence without notice
Rev B
13-Oct-2005
Page 2 of 5
Data Sheet
Part Number 855844
225 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev B
13-Oct-2005
Page 3 of 5
Data Sheet
Actual matching values may vary due to PCB layout and parasitics
7pF
2
5
82nH
1
7pF
3,4,7,8
6
Part Number 855844
225 MHz SAW Filter
Matching Schematics
7pF
50Ω
Balanced
50Ω
82nH
50Ω
7pF
Marking
2.28
Sawtek
logo
Marking
code
PCB Footprint
5.20
1.47
C
JJJYM
.84
.71
ID dot
Date code
.43
.84
1.47
The date code consists of: JJJ = Julian day,
Y = last digit of year, M = manufacturing site code
This footprint represents a recommendation only
Dimensions shown are nominal in millimeters
Tape and Reel
2.7
12.8
Ø330
Sawtek
logo
0.3
2.0
4.0
Ø1.5
A
1.75
5.5
5.25
1.8
Section A-A
5.25
8.0
Ø1.5
A
ID dot
Ø102
Direction of travel
12.0
Ø20.2
Ø13.0
2.0
Dimensions shown are nominal in millimeters
Packaging quantity: 4000 units/reel
Subject to change or obsolescence without notice
Rev B
13-Oct-2005
Page 4 of 5
Data Sheet
Maximum Ratings
Parameter
Operating Temperature Range
Storage Temperature Range
Part Number 855844
225 MHz SAW Filter
Symbol
T
T
stg
Minimum
-20
-40
Maximum
+70
+85
Unit
o
o
C
C
Important Notes
Warnings
•
•
•
•
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
RoHS Compliance
This product complies with EU directive 2002/95/EC (RoHS)
Pb
Solderability
Compatible with JEDEC J-STD-020C
Pb-free
process,
260°C
peak reflow temperature
(see
soldering profile)
Links to Additional Technical Information
PCB Layout Tips
S-Parameters
Qualification Flowchart
RoHS Information
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.
京公网安备 11010802033920号
EEWORLD
