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
)
PDF 
ZIP