Preliminary Data Sheet
Features
•
•
•
•
•
•
•
For 3G applications
Usable bandwidth 60 MHz
Low loss
No impedance matching required for operation
at 50
Ω
Single-ended operation
Ceramic Surface Mount Package (SMP)
Small size
Part Number 855938
1950 MHz SAW Filter
•
Package
Surface Mount 3.00 x 3.00 x 1.22 mm
Pin Configuration
Bottom View
1
2
3
1.22 NOM.
1.32 MAX.
0.69
3.00
6
5
4
0.75
1.50
3.00
0.75
Pin No.
2,5
1,3,4,6
Description
Input/Output
Case ground
0.60
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 C
29-Jan-2002
Page 1 of 5
Preliminary Data Sheet
Operating Temperature Range:
(2)
-30 to +85
o
C
Part Number 855938
1950 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency
Maximum Insertion Loss
1920 - 1980 MHz
Absolute Attenuation
10 - 1850 MHz
380 MHz
2110 - 2170 MHz
2300 - 2360 MHz
2680 - 2740 MHz
Input VSWR
1920 - 1980 MHz
Output VSWR
1920 - 1980 MHz
Source Impedance:
(4)
Load Impedance:
(4)
Notes:
1.
2.
3.
4.
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
This is the optimum impedance in order to achieve the performance shown
Minimum
-
-
20
29
28
28
25
-
-
-
-
Typical
1950
2.7
25
31
30
32
32
1.6
1.7
50
50
Maximum
-
5
-
-
-
-
-
2.10
2.61
-
-
Unit
MHz
dB
dB
dB
dB
dB
dB
-
-
Ω
Ω
Test Circuit:
2
5
50
Ω
50
Ω
Single-ended
50
Ω
1,3,4,6
No impedance matching
required
Subject to change or obsolescence without notice
Rev C
29-Jan-2002
Page 2 of 5
Preliminary Data Sheet
Part Number 855938
1950 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev C
29-Jan-2002
Page 3 of 5
Preliminary Data Sheet
Part Number 855938
1950 MHz SAW Filter
Matching Schematics
2
5
50
Ω
50
Ω
Single-ended
50
Ω
1,3,4,6
No impedance matching
required
Marking
Sawtek
logo
Marking
code
PCB Footprint
3.20 SQ
.96
9
JJJYM
1.70
1.27
ID dot
Date code
.81
.38
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
4.0
0.21
2.0
Ø1.5
A
1.75
5.5
ID dot
Ø102
Ø20.2
Ø13.0
2.0
Direction of travel
12.0
3.25
1.4
Section A-A
3.25
4.0
Ø1.5
A
Dimensions shown are nominal in millimeters
Packaging quantity: 5000 units/reel
Subject to change or obsolescence without notice
Rev C
29-Jan-2002
Page 4 of 5
Preliminary Data Sheet
Maximum Ratings
Parameter
Operating Temperature Range
Storage Temperature Range
Part Number 855938
1950 MHz SAW Filter
Symbol
T
T
stg
Minimum
-30
-40
Maximum
+85
+85
Unit
o
o
C
C
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
Rev C
Or contact one of our worldwide
Network of
sales offices,
Representatives or distributors
29-Jan-2002
Page 5 of 5
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