Preliminary Data Sheet
Part Number 856270
350 MHz SAW Filter
Features
For wireless broadband applications
Usable bandwidth 2.6MHz
Low loss
High attenuation
Single ended operation
Ceramic Surface Mount Package (SMP)
Small size
Package
Pin Configuration
Surface Mount 9.10 x 4.80 x 1.24 mm
Bottom View
9
10
8
7
6
5
4
3
2
1
Pin No.
Description
4
Input
5
Input
Return
9
Output
10
Output
Return
1,2,3,6,7,8 Case
Ground
9.10
0.69
2.54
1.00
0.80
2.54
4.80
1.50
1.24 NOM.
1.35 MAX.
Dimensions shown are nominal in millimeters
All tolerances are
0.15mm except overall
length and width +0.10mm/-0.10mm
Body: Al
2
O
3
ceramic
Lid: Kovar, 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 -
26-Mar-2004
Page 1 of 5
Preliminary Data Sheet
Part Number 856270
350 MHz SAW Filter
Electrical Specifications
(1)
Operating Temperature Range:
(2)
0 to +70
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency
349 350 351
MHz
Insertion Loss at 350 MHz
(4)
- 9.8
13
dB
3 dB Bandwidth
2.6 3.0 -
MHz
Relative Attenuation
(4)
10.0 - 347.8 MHz
347.0 - 347.8 MHz
347.8 - 348.3 MHz
351.7 - 352.2 MHz
352.2 - 353.0 MHz
353.0 - 1000 MHz
45
27
5
5
27
45
52
28
6
6
28
52
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
Group Delay Variation
349 - 351 MHz (any 500 kHz channel)
-
85
100
nsec
Optimal Source Impedance
(5)
- 50 -
Optimal Load Impedance
(5)
- 50 -
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. Reference to insertion loss at 350MHz
5. This is the optimum impedance in order to achieve the performance shown
Test Circuit:
50
Single-ended
1,2,3,5
6,7,8,10
50
27pF
15nH
27pF
4
9
22nH
50
Subject to change or obsolescence without notice
Rev -
26-Mar-2004
Page 2 of 5
Preliminary Data Sheet
Part Number 856270
350 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev -
26-Mar-2004
Page 3 of 5
Preliminary Data Sheet
Part Number 856270
350 MHz SAW Filter
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
1,2,3,5
6,7,8,10
50
27pF
15nH
27pF
4
9
22nH
50
Marking
PCB Footprint
ID Dot
Date Code
XXXXXX
856270
SAWTEK
9.29
1.19
1.01
1.70
5.00
3.55
1.53
1.01
1.19
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
5.1
8.0
1.5
4.0
2.0
0.3
1.6
Section A-A
9.4
A
1.75
7.5
16.0
A
1.5
ID dot
2.0
13.0
20.2
102
2.7
16.8
330
Direction of travel
Dimensions shown are nominal in millimeters
Packaging quantity: 4000 units/reel
Subject to change or obsolescence without notice
Rev -
26-Mar-2004
Page 4 of 5
Preliminary Data Sheet
Part Number 856270
350 MHz SAW Filter
Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Operating Temperature Range
T
0
+70
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 -
26-Mar-2004
Page 5 of 5
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