S
TANDARD
SAW F
ILTERS
(70MH
Z
, 140MH
Z
)
Integrated
Circuit
Systems, Inc.
G
ENERAL
D
ESCRIPTION
This family of SAW (surface acoustic wave) filters is
available in standard center frequencies of 70MHz and
140MHz. Bandwidths range from 0.25MHz to very wide
bandwidths (up to 56MHz). These filters are ideal for
general radio applications where the common IF is
70MHz or 140MHz and high rejection is needed.
F
EATURES
SAW 3dB bandwidths from 0.25MHz to 56MHz
Insertion loss ranging from 20dB to 28dB
High rejection to remove spurious signals
Low amplitude ripple and group delay variation
Steep skirts optimized for high close-in rejection
Packages inc.: DIP-BT (27 x 12.6mm), and
DIP-O (22 x 13mm)
A
PPLICATIONS
Military radios
Telemetry systems
Communication and navigation
Test equipment
Repeaters
T
YPICAL
R
ESPONSE
SF140CF51907T
B
LOCK
D
IAGRAM
Standard SAW Filters (70MHz, 140MHz)
Modulator
Mixer
RF PA
Amp
70 or 140MHz
SAW Filter
Switch
or
Duplexer
Voice, Data,
Video, etc.
Amp
Mixer
Demodulator
Mixer
LNA
Amp
Mixer
Amp
70 or 140MHz
SAW Filter
Voice, Data,
Video, etc.
IF Synthesizer
RF Synthesizer
Antenna
Generic Radio Application
133. 6
135. 2
136. 8 138.4
140
141.6
143. 2
144. 8
146. 4
-104.538
-94.538
-84.538
-74.538
-64.538
-54.538
-44.538
-34.538
-24.538
Ty pe performanc e
F requenc y(MHz )
M
a
gni
t
u
de(
dB
)