Preliminary Data Sheet
Part Number 856155
1855 MHz SAW Filter
Features
For KPCS applications
Usable bandwidth 30 MHz
No impedance matching required
Single-ended input
Balanced output
Superior amplitude and phase balance
Ceramic Surface Mount Package (SMP)
Small size
Package
Pin Configuration
Surface Mount 2.50 x 2.00 x 0.76 mm
Bottom View
5
4
3
2
1
Pin No. Description
1
Input
unbalanced
3,4
Output
balanced
2,5
Case
ground
0.76 NOM.
0.84 MAX.
0.50
0.50
2.00
2.50
0.94
1.38
0.94
Dimensions shown are nominal in millimeters
All tolerances are
0.10mm
Body: Al
2
O
3
ceramic
Lid: Kovar or Alloy 42, Au over Ni plated
Terminations: Au plating 0.5 - 1.0
m,
over a 2 - 6
m Ni plating
Subject to change or obsolescence without notice
Rev B
28-Jan-2003
Page 1 of 5
Preliminary Data Sheet
Part Number 856155
1855 MHz SAW Filter
Electrical Specifications
(1)
Operating Temperature Range:
(2)
-30 to +85
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency
- 1855 -
MHz
Maximum Insertion Loss
1840
-
1870
MHz
-
3
3.5
dB
Absolute Attenuation
100
-
1025
MHz
1025
-
1750
MHz
1750
-
1780
MHz
1930
-
2220
MHz
2220
-
6000
MHz
45
40
35
25
40
50
50
45
30
50
-
-
-
-
-
dB
dB
dB
dB
dB
Output Amplitude Balance (|S
31
/S
21
|)
1840
-
1870
MHz
-1.5
1.2
1.5
dB
Output Phase Balance [
(S
31
)-
(S
21
)+180]
1840
-
1870
MHz
-8
5
8
degree
Input/Output VSWR
1840
-
1870
MHz
-
1.9
2.5
-
Optimal Source Impedance
(4)
- 50 -
Optimal Load Impedance (balanced)
(4)
- 100 -
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
Single-ended
Input
2,5
1
3
50
4
100
100
Balanced
Output
Subject to change or obsolescence without notice
Rev B
28-Jan-2003
Page 2 of 5
Preliminary Data Sheet
Part Number 856155
1855 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev B
28-Jan-2003
Page 3 of 5
Preliminary Data Sheet
Part Number 856155
1855 MHz SAW Filter
Matching Schematics
50
Single-ended
Input
2,5
1
3
50
4
100
100
Balanced
Output
Marking
PCB Footprint
T
JJJYM
ID dot
Date code
Marking
code
logo
Sawtek
.71 SQ
.69
.23
2.08
2.59
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
1.75
3.5 8.0
A
A
2.0
4.0
4.0
1.0
1.5
2.75
1.1
0.3
Section A-A
2.23
2.7
8.8
330
102
20.2
13.0
2.0
ID dot
Direction of travel
Sawtek
logo
Dimensions shown are nominal in millimeters
Packaging quantity: 10000 units/reel
Subject to change or obsolescence without notice
Rev B
28-Jan-2003
Page 4 of 5
Preliminary Data Sheet
Part Number 856155
1855 MHz SAW Filter
Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Operating Temperature Range
T
-30
+85
o
C
Storage Temperature Range
T
stg
-40 +85
o
C
Warnings
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips
Qualification Flowchart
S-Parameters
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.
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
Soldering Profile
Other Technical Information
Subject to change or obsolescence without notice
Rev B
28-Jan-2003
Page 5 of 5
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