www.RFM.com E-mail: info@rfm.com
©2008 by RF Monolithics, Inc.
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• Ideal Front-End Filter for European Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• RoHS Compliant
• Complies with Directive 2002/95/EC (RoHS)
The RF3404E is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 433.92 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 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.
Electrical Characteristics
Characteristic
Center Frequency at 25°C
Insertion Loss (433.760 - 434.080)
3 dB Bandwidth
Rejection Attenuation: (relative to ILmin)
Turnover Temperature
Temperature
Frequency Aging
Impedance @ fc
Lid Symbolization (Y=year WW=week S=shift)
Standard Reel Quantity
Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50
VSWR
width and passband shape are dependent on the impedance matching component values and quality.
The frequency f
Where noted specifications apply over the entire specified operating temperature range of -40°C to +105°C.
The turnover temperature, T
be calculated from: f = f
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.
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f
c
is defined as the midpoint between the 3dB frequencies.
o
[1 - FTC (T
Absolute Frequency
Tolerance from
Freq. Temp. Coefficient
Absolute Value during the First Year
Input Z
Output Z
O
, is the temperature of maximum (or turnover) frequency, f
IN
OUT
= R
o
- T
IN
= R
c
llC
)
2
OUT
].
Reel Size 13 Inch
MHz
IN
Reel Size 7 Inch
llC
445 - 1000 MHz
414 - 424 MHz
424 - 430 MHz
430 - 432 MHz
436 - 437 MHz
437 - 440 MHz
441 - 445 MHz
OUT
10 - 414 MHz
Pb
Sym
IL
Z
BW
FTC
|fA|
Z
To
OUT
f
MIN
IN
c
f
c
3
Notes
1, 2, 3
1, 2
1, 3
1, 3
1, 3
3, 4
5
1
9
o
. The nominal frequency at any case temperature, T
Minimum
600
30
27
16
19
25
15
30
10
8
697 // YWWS
150
175
Typical
433.92
3000 Pieces/Reel
0.032
c
±100
500 Pieces/Reel
650
. Note that insertion loss and band-
2.3
40
35
20
10
25
32
20
46
25
// 3.4pF
// 4.1pF
10
433.92 MHz
SAW Filter
RF3404E
SM3030-6 Case
Maximum
3.0 x 3.0
750
3.5
40
RF3404E - 10/7/08
test system with
ppm/°C
Page 1 of 4
ppm/yr
Units
MHz
kHz
kHz
dB
dB
°C
c
, may
2