RF3417D
•
•
•
•
Ideal Front-End Filter for Wireless Receivers
Low-Loss, Coupled-Resonator Quartz Design
Simple External Impedance Matching
Complies with Directive 2002/95/EC (RoHS)
Pb
315.0 MHz
SAW Filter
The RF3417D is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 315.0 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 wireless remote-
control and security devices (especially for automotive keyless entry) operating in the USA under FCC Part
15, in Canada under RSS-210, and in Italy.
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.
SM3838-8 Case
3.8 x 3.8
Typical
315.00
1.6
0.4
Electrical Characteristics, -40°C to +90°C Per Note 3 Below
Characteristic
Center Frequency at 25°C
Insertion Loss
Passband Ripple Relative to IL
MIN
, Fc ±200 kHz
3 dB Bandwidth
Rejection Relative to IL
MIN
10 - 295 MHz
295 - 305 MHz
305 - 310 MHz
310 - 313 MHz
313 - 314 MHz
316 - 320 MHz
320 - 325 MHz
325 - 335 MHz
335 - 600 MHz
600 - 1000 MHz
Temperature
Frequency Aging
Impedance @ fc
Freq. Temp. Coefficient
Absolute Value during the First Year
Input: Z
IN
= R
IN
llC
IN
FTC
lfAl
Z
IN
Z
OUT
5
1
1, 3
BW
3
Sym
f
c
IL
MIN
Notes
1, 2, 3
1, 3
1, 3
1, 3
Minimum
314.85
Maximum
315.15
2.5
1.2
800
Units
MHz
dB
dB
kHz
500
46
41
27
17
7
9
16
32
42
55
600
51
46
30
20
10
12
20
36
46
60
0.032
≤10
1.92 kΩ || 5.93 pF
1.28 kΩ || 6.09 pF
550 || YWWS
dB
ppm/°C
2
ppm/yr
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
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 band-
width and passband shape are dependent on the impedance matching component values and quality.
The frequency f
c
is defined as the midpoint between the 3 dB 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. Typically, 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.
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RF3417D - 3/19/09
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www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
RFM [ RF MONOLITHICS, INC ]
