Preliminary Data Sheet
Part Number 855938
1950 MHz SAW Filter
Subject to change or obsolescence without notice Rev C 29-Jan-2002 Page 1 of 5
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
•
Package Pin Configuration
Surface Mount 3.00 x 3.00 x 1.22 mm Bottom View
654
3
21
0.69
1.22 NOM.
1.32 MAX.
0.75
0.60
1.50
0.75
3.00
3.00
Dimensions shown are nominal in millimeters
All tolerances are ±0.15mm except overall
length and width ±0.10mm
Body: Al2O3 ceramic
Lid: Kovar, Ni plated
Terminations: Au plating 0.5 - 1.0µm,
over a 2 - 6µm Ni plating
Pin No. Description
2,5 Input/Output
1,3,4,6 Case ground
Preliminary Data Sheet
Part Number 855938
1950 MHz SAW Filter
Subject to change or obsolescence without notice Rev C 29-Jan-2002 Page 2 of 5
Electrical Specifications (1)
Operating Temperature Range: (2) -30 to +85 oC
Parameter (3) Minimum Typical Maximum Unit
Center Frequency - 1950 - MHz
Maximum Insertion Loss
1920 - 1980 MHz
-
2.7
5
dB
Absolute Attenuation
10 - 1850 MHz
380 MHz
2110 - 2170 MHz
2300 - 2360 MHz
2680 - 2740 MHz
20
29
28
28
25
25
31
30
32
32
-
-
-
-
-
dB
dB
dB
dB
dB
Input VSWR
1920 - 1980 MHz
-
1.6
2.10
-
Output VSWR
1920 - 1980 MHz
-
1.7
2.61
-
Source Impedance: (4) - 50 -
Ω
Load Impedance: (4) - 50 -
Ω
Notes:
1. All specifications are based on the test circuit shown below
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 shown
Test Circuit:
50 Ω
Single-ended
1,3,4,6
25
50 50
ΩΩ
No impedance matching
required
Preliminary Data Sheet
Part Number 855938
1950 MHz SAW Filter
Subject to change or obsolescence without notice Rev C 29-Jan-2002 Page 3 of 5
Typical Performance (at +25oC)
Preliminary Data Sheet
Part Number 855938
1950 MHz SAW Filter
Subject to change or obsolescence without notice Rev C 29-Jan-2002 Page 4 of 5
Matching Schematics
50 Ω
Single-ended
1,3,4,6
25
50 50
ΩΩ
No impedance matching
required
Marking PCB Footprint
Marking
code
Date code
9
JJJYM
logo
ID dot
Sawtek
.96
3.20 SQ
1.27
.38
.81
1.70
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
3.25
Section A-A
1.75
Ø1.5
4.0 A
12.0
5.5
Ø1.5
4.0
2.0
3.25
1.4
0.21 A
Ø102 Ø20.2
Ø13.0 2.0 Direction of travel
Ø330
12.8
2.7 logo
Sawtek
ID dot
Dimensions shown are nominal in millimeters
Packaging quantity: 5000 units/reel
Preliminary Data Sheet
Part Number 855938
1950 MHz SAW Filter
Subject to change or obsolescence without notice Rev C 29-Jan-2002 Page 5 of 5
Maximum Ratings
Parameter Symbol Minimum Maximum Unit
Operating Temperature Range T -30 +85 oC
Storage Temperature Range Tstg -40 +85
oC
Warnings
• Electrostatic Sensitive Device (ESD)
• Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips Qualification Flowchart Soldering Profile
S-Parameters Other Technical Information
Contact Information
PO Box 609501
Orlando, FL 32860-9501
USA
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
