®
RF1414D
372.500 MHz
SAW Filter
•
•
•
•
Ideal Front-End Filter for European Wireless Receivers
Low-Loss, Coupled-Resonator Quartz Design
Simple External Impedance Matching
Pb
Complies with Directive 2002/95/EC (RoHS)
The RF1414D is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to pro-
vide front-end selectivity in 372.500 MHz receivers. Receiver 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.
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 ad-
vanced SAW design and fabrication technology is utilized to achieve high performance and very low loss with
simple external impedance matching.
Electrical Characteristics
Characteristic
Center Frequency at 25°C
Insertion Loss
3 dB Bandwidth
Rejection Attenuation: (relative to ILmin)
10 - 354 MHz
354 - 364 MHz
364 - 369 MHz
369 - 370 MHz
374 - 378 MHz
378 - 380 MHz
380 - 382 MHz
382 - 389 MHz
389 - 550 MHz
550 - 1000 MHz
Temperature
Frequency Aging
Impedance @ fc
Freq. Temp. Coefficient
Absolute Value during the First Year
Input Z
IN
= R
IN
llC
IN
Output Z
OUT
= R
OUT
llC
OUT
Lid Symbolization (Y=year WW=week S=shift)
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
9
FTC
|fA|
Z
IN
Z
OUT
5
1
1, 3
Absolute Frequency
Sym
f
c
IL
MIN
BW
3
Notes
1, 2, 3
1, 3
1, 3
350
45
35
25
14
25
15
20
25
45
40
50
40
30
15
30
20
25
28
50
45
0.032
≤10
Minimum
Typical
372.500
2.1
SM3838-8 Case
3.8 x 3.8
Maximum
Units
MHz
3.0
500
dB
kHz
dB
ppm/°C
2
ppm/yr
27.8 // 2.3 pf
41 // 2.3 pf
528 // YWWS
500 Pieces/Reel
3000 Pieces/Reel
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 and passband shape are
dependent on the impedance matching component values and quality.
The frequency f
c
is defined as the midpoint between the 3dB frequencies.
Where noted specifications apply over the entire specified operating temperature range of -40°C to +90°C.
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
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
RF1414D-120105
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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 ]
