SAW Filters for
GPS Applications
General Description
ICS offers a range of surface acoustic wave (SAW) devices to be used in GPS applications.
Designed with low loss and excellent rejection characteristics, the ICS product offering includes
front-end RF bandpass filters, intermediate frequency (IF) filters, and a delay line to provide a
complete system solution. The GPS SAW filters are lead-free and RoHS-compliant.
Front-End RF Bandpass Filters
The SF1575BA02505S and SF157BA02056S are 1575.42-
MHz bandpass filters that offer low loss, excellent rejection,
and miniature surface-mount packaging to meet the needs
of small form-factor GPS receivers.
IF Filter
Designed for IF-stage filtering, the SF0185BA02302S is
centered at 185.76 MHz with a bandwidth of 4.48 MHz.
This part offers tight rejection, low-amplitude ripple, and
low-phase ripple.
GPS Receiver Block Diagram
Antenna
IF SAW
LNA
IF IC
RF SAW
Baseband
~
Synthesizer
Delay Line
The SF1575DL03104S is a 1575-MHz SAW delay line
designed for use in GPS, satellite, and other high-end communications applications.
RF Filters
Part
Number
F
C
Min.
Max.
Bandwidth Insertion Loss
Rejection
Amplitude
Ripple
Package
SF1575BA02505S
SF1575BA02506S
1575.42 MHz
1575.42 MHz
2.4 MHz
2.4 MHz
1.8 dB
2.0 dB
30 dB @ -75 MHz
30 dB @ +50 MHz
30 dB @ -75 MHz
30 dB @ +50 MHz
1.0 dB
1.0 dB
SMP0303
(3.0 x 3.0 mm)
SMP0202
(2.4 x 2.0 mm)
IF Filters
Part
Number
F
C
Min.
Max.
Bandwidth Insertion Loss
Rejection
GD
Ripple
Package
SF0185BA02302S
185.76 MHz
4.48 MHz
25 dB
42 dB @ -9.54 MHz
42 dB @ +9.46 MHz
2.0 ns p-p
max.
SMP0907
(9.1 x 7.1 mm)
Delay Lines
Part
Number
F
C
Min.
Max.
Bandwidth Insertion Loss
Average
Group Delay
GD
Ripple
Package
SF01575DL03104S
1575 MHz
20 MHz
23 dB
230 ns max.
2.0 dB
SMP0505
(5.0 x 5.0 mm)
ICS also offers custom and semi-custom devices to match your frequency plan and requirements. Please
contact the ICS representative nearest you with your details.
www.icst.com
SAW Filters for GPS Applications
www.icst.com
SAW Components Group
324 Clark Street
Worcester, MA 01606
Tel.: |508| 852.5400
FAX: |508| 852-8456
North America
525 Race Street
San Jose, CA 95126
Tel.: |408| 925.9422
FAX: |408| 271-2578
China
9F-2, No. 160, Sec. 6
Min Chuan East Road
Nei Hu Taipei, Taiwan
Tel.: 886.2.8792.0010
FAX: 886.2.8791.6700
Units:
mm
Package Diagrams
(All dimensions in millimeters)
SMP0202
SMP0303
Units:
mm
Pad Configuration:
Input:
2
Output:
5
Ground:
1, 3, 4, 6
Europe
P.O. Box 34
Lewes, BN8 4YQ
United Kingdom
Tel.: +44 |0| 1273.401301
FAX: +44 |0| 1273.401304
Japan
Kakiya Bldg, 8th Floor
2-7-17 Shinyokohama
Kouhoku-ku, Yokohama
222-00033 Japan
Tel.: 045.478.0841
FAX: 045.478.0847
Korea
#1906 B-Section Building of
Kolong Tripolics
210 Kumkok-Dong, Bundang-Gu
Sungnang-City, Kyungki-Do
463-805 Korea
Tel.: 82.31.728.3356
FAX: 82.31.728.3357
Pad Configuration:
Input:
1
Output:
3
Ground:
2, 4
SMP0505
SMP0907
Units:
mm
Pad Configuration:
Input:
9
Input Return:
8
Output:
4
Output Return: 3
Ground:
1, 2, 5, 6,
7, 10, 11
Units:
mm
Pad Configuration:
Input:
3
Input Return:
2
Output:
7
Output Return: 6
Ground:
1, 4, 5, 8
The ICS logo is a registered trademark of Integrated Circuit Systems, Inc.
All others are trademarks of their respective owners and may be registered in certain jurisdictions.
The information furnished herein is believed to be accurate and reliable. However, ICS reserves the right to make changes without notice.
© Copyright 2005 Integrated Circuit Systems, Inc. Printed in USA. All rights reserved.
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