Preliminary Data Sheet
Features
•
•
•
•
•
•
For broadband wireless access and VOFDM
applications
Usable bandwidth 5.16 MHz
High attenuation
Single-ended operation
Ceramic Surface Mount Package (SMP)
Small size
Part Number 855731
426 MHz SAW Filter
•
Package
Surface Mount 13.30 x 6.50 x 1.75 mm
Pin Configuration
Bottom View
1
1.75 NOM.
1.96 MAX.
0.76
13.3
2.54
2
3
4
5
6
12
11
10
9
8
7
2.18
6.50
2.54
1.17 x 3.76
0.79
1.50
Pin No.
11
5
1,2,3,4,6
7,8,9,10,12
Description
Input
Output
Case ground
Case ground
Dimensions shown are nominal in millimeters
All tolerances are
±0.15mm
except overall
length and width
±0.10mm
Body:
Al
2
O
3
ceramic
Lid:
Kovar, Ni
plated
Terminations:
Au
plating 0.5 - 1.0µm,
over a 2 - 6µm
Ni
plating
Subject to change or obsolescence without notice
Rev -
14-Sep-2001
Page 1 of 5
Preliminary Data Sheet
Operating Temperature Range:
(2)
0 to +70
o
C
Part Number 855731
426 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency
Insertion Loss at 426 MHz
Upper 0.5 dB Point
(4)
Lower 0.5 dB Point
(4)
Upper 3 dB Point
(4)
Lower 3 dB Point
(4)
Upper 40 dB Point
(4)
Lower 40 dB Point
(4)
Upper 45 dB Point
(4)
Lower 45 dB Point
(4)
Upper 50 dB Point
(4)
Lower 50 dB Point
(4)
Relative Attenuation
100.0 - 419.5 MHz
433.5 - 500.0 MHz
Phase Ripple
423.3 - 428.7 MHz
Input VSWR at 426MHz
Output VSWR at 426MHz
Triple Transit Suppression
Passband Ripple
(5)
Source Impedance:
(6)
Load Impedance:
(6)
Notes:
1.
2.
3.
4.
5.
6.
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 temperature drift and manufacturing tolerances
Relative to insertion loss at 426MHz
100% of the 1 dB bandwidth (Maximum peak to adjacent valley)
This is the optimum impedance in order to achieve the performance shown
Minimum
-
-
428.52
-
-
422.35
-
421.31
-
421.20
-
419.50
50
50
-
-
-
40
-
-
-
Typical
426
18.02
428.81
423.16
429.25
422.69
430.53
421.59
430.70
421.55
432.75
421.51
60.1
53.2
3.1
3.2
1.9
43
0.21
50
50
Maximum
-
20.5
-
423.36
429.65
-
430.74
-
430.89
-
433.50
-
-
-
10
5.0:1
2.5:1
-
0.7
-
-
Unit
MHz
dB
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
deg p-p
dB
dB
Ω
Ω
Test Circuit:
15nH
11
5
15pF
1,2,3,4,6
7,8,9,10,12
50Ω
Ω
12nH
50
Ω
Single-ended
50Ω
Ω
10pF
Subject to change or obsolescence without notice
Rev -
14-Sep-2001
Page 2 of 5
Preliminary Data Sheet
Part Number 855731
426 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev -
14-Sep-2001
Page 3 of 5
Preliminary Data Sheet
Actual matching values may vary due to PCB layout and parasitics
15nH
11
5
12nH
Part Number 855731
426 MHz SAW Filter
Matching Schematics
50
Ω
Single-ended
50Ω
Ω
10pF
15pF
1,2,3,4,6
7,8,9,10,12
50Ω
Ω
Marking
1.70
PCB Footprint
13.51
3.53
SAWTEK
855731
XXXXXX
ID Dot
Date Code
6.70
.99
.99
8.61
1.55
1.70
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
24.8
2.7
Ø330
0.3
2.0
ID dot
4.0
Ø1.5
A
1.75
11.5
13.9
24
Ø102
Ø20.2
Ø13.0
2.0
Direction of travel
2.3
Section A-A
7.1
12.0
Ø1.5
A
Dimensions shown are nominal in millimeters
Packaging quantity: 2000 units/reel
Subject to change or obsolescence without notice
Rev -
14-Sep-2001
Page 4 of 5
Preliminary Data Sheet
Maximum Ratings
Parameter
Operating Temperature Range
Storage Temperature Range
RF Power
Part Number 855731
426 MHz SAW Filter
Symbol
T
T
stg
P
in
Minimum
0
-40
-
Maximum
+70
+85
+10
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
Contact Information
PO Box 609501
Orlando, FL 32860-9501
USA
Subject to change or obsolescence without notice
Phone: +1 (407) 886-8860
Fax: +1 (407) 886-7061
Email:
custservice@sawtek.com
Web:
www.sawtek.com
Or contact one of our worldwide
network of
sales offices,
representatives or distributors
Rev -
14-Sep-2001
Page 5 of 5
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