Data Sheet
Part Number 855874
400 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
16-Jan-2002
Page 1 of 5
Features
For GSM applications, IF stage
Usable bandwidth 166 KHz
Low loss
Low group delay variation
Single-ended or balanced operation
Ceramic Surface Mount Package (SMP)
Small size
Package
Pin Configuration
Surface Mount 5.00 x 3.00 x 1.24 mm
Bottom View
8
7
6
5
4
3
2
1
1.24 NOM.
1.35 MAX.
0.69
0.51
0.79
1.30
3.00
1.27
5.00
Dimensions shown are nominal in millimeters
All tolerances are
0.15mm except overall
length +0.15/-0.10mm and width +0.15/-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
Pin No.
Description
1
Input
2
Input return or ground
5
Output
6
Output return or ground
8
Coupling inductor
3,4,7
Case ground
Data Sheet
Part Number 855874
400 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
16-Jan-2002
Page 2 of 5
Electrical Specifications
(1)
Operating Temperature Range:
(2)
-40 to +85
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency, fo
- 400 -
MHz
Insertion Loss at 400 MHz
Excluding losses due to matching
Including losses in matching test circuit shown below
-
-
2.6
4.4
4.2
6.0
dB
dB
Lower 2 dB Bandedge
- 399.8
399.917
MHz
Upper 2 dB Bandedge
400.083 400.2
- MHz
9 dB Bandwidth
- 0.55 0.8
MHz
12 dB Bandwidth
- 0.58 1.2
MHz
22 dB Bandwidth
- 0.69 1.6
MHz
Amplitude Variation
399.917 - 400.083 MHz
-
0.21
2
dB
Group Delay Variation
399.917 - 400.083 MHz
-
300
1000
nsec
Rejection
(4)
398.5 - 399.2 MHz
399.2 - 399.4 MHz
399.4 - 399.6 MHz
400.4 - 400.6 MHz
400.6 - 400.8 MHz
400.8 - 401.5 MHz
22
12
9
9
12
22
37
34
28
26
34
37
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
Out of Band Rejection
50 - 398.5 MHz
401.5 - 500 MHz
37
37
45
45
-
-
dB
dB
Optimal Source Impedance
(5)
-
560
||44nH
-
Optimal Impedance
(5)
-
860
||34nH
-
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. Relative to insertion loss at 400 MHz
5. This is the complex conjugate of the unmatched filter's impedance resulting in maximum power transfer
Test Circuit:
50
Single-ended
2,3,4,6,7
1
5
50
8
50
30nH
2pF
47nH
2.5pF
30nH
Data Sheet
Part Number 855874
400 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
16-Jan-2002
Page 3 of 5
Typical Performance
(at +25
o
C)
Data Sheet
Part Number 855874
400 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
16-Jan-2002
Page 4 of 5
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
2,3,4,6,7
1
5
50
8
50
30nH
2pF
47nH
2.5pF
30nH
Marking
PCB Footprint
Date code
Marking
code
N
JJJYM
logo
Sawtek
ID dot
1.22
.56
.71
3.20
1.50
4.52
.99
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
Section A-A
1.8
5.3
4.0
8.0
0.3
2.0
1.5
3.3
5.5
12.0
1.5
A
A
1.75
ID dot
logo
Sawtek
Direction of travel
2.0
13.0
20.2
102
330
12.8
2.7
Dimensions shown are nominal in millimeters
Packaging quantity: 4000 units/reel
Data Sheet
Part Number 855874
400 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
16-Jan-2002
Page 5 of 5
Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Operating Temperature Range
T
-40
+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
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
PDF 
ZIP