®
RF1295C
451.35 MHz
SAW Filter
•
•
•
•
Ideal Front-End Filter for 451.35 MHz Wireless Receivers
Low-Loss Coupled-Resonator Quartz Design
Simple External Impedance Matching
Pb
Complies with Directive 2002/95/EC (RoHS)
The RF1295C is a low-loss, compact, and economical surface acoustic wave (SAW) filter designed to pro-
vide front-end selectivity in 451.35 MHz receivers. Recevier designs using this filter include superhet with
10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of these receivers are wire-
less remote-control and security devices operating in Europe under ETSI I-ETS 300 220.
This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater
than 40 dB, of the LO and image spurious responses of superhet receivers with 10.7 MHz IF. RFM’s
advanced SAW design and fabrication technology is utilized to achieve high performance and very low loss
with simple external impedance matching (not included).
SM5050-8 Case
5x5
Electrical Characteristics
Characteristic
Center Frequency at
25°C
Insertion Loss
3 dB Bandwidth Passband
Rejection
at f
c
- 21.4 MHz (Image)
at f
c
- 10.7 MHz (LO)
Ultimate
Temperature
Operating Case Temperature
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficent
Frequency Aging
External Impedance
Absolute Value during the 1
st
Year
Series Inductance
Shunt Capacitance
Shunt Capacitance
Lid Symbolization (Y=year, WW=week, D=day of week)
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
T
C
T
O
f
O
FTC
|fA|
L
C
1
C
2
2
6
6
6
2, 6
-40
15
25
f
nom
0.032
<±10
27
5.6
8.2
482 // YWWS
500 Pieces/Reel
3000 Pieces/Reel
3
Nominal Frequency
Sym
f
nom
IL
BW
3
Notes
1, 3, 4, 5
3, 6
2, 3, 6
700
35
15
Minimum
Typical
451.35
2.5
1000
45
30
80
+85
40
°C
°C
MHz
ppm/°C
2
ppm/yr
nH
pF
pF
dB
5.0
Maximum
Units
MHz
dB
kHz
9
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50
Ω
test system with VSWR
≤
1.2:1.
The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f
c
. Note that insertion loss and bandwidth are dependent on the imped-
ance matching component values and quality.
2.
The frequency f
c
is defined as the midpoint between the 3dB frequencies.
3.
Where noted, specifications apply over the entire specified operating temperature range.
4.
The turnover temperature, T
O
, is the temperature of maximum (or turnover) frequency, f
o
,. The nominal frequency at any case temperature, T
C
, may be calculated
5.
6.
7.
8.
9.
from: f=f
o
[1 - FTC (T
O
- T
C
)
2
].
Frequency aging is the change in fc with time and is specified at +65°C or less. Aging may exceed the specification for prolonged temperatures above +65°C. Typ-
ically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years.
The design, manufacturing process, and specifications of this device are subject to change.
One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending.
All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale.
Tape and Reel Standard Per ANSI / EIA 481.
E-mail: info@rfm.com
http://www.rfm.com
RF1295C-071904
Page 1 of 2
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RFM [ RF MONOLITHICS, INC ]
