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PDF RF1171 Data sheet ( Hoja de datos )

Número de pieza RF1171
Descripción 418.0 MHz SAW Filter
Fabricantes RF Monolithics 
Logotipo RF Monolithics Logotipo



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®
• Ideal Front-End Filter for Wireless Receiver in the UK and USA
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Rugged TO39 Hermetic Package
• Complies with Directive 2002/95/EC (RoHS) Pb
The RF1171 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 418.0 MHz receivers. Receiver designs using this filter include superhet with
10.7 MHz direct conversion and superregen. Typical applications of these receivers are wireless remote-
control and security devices operating in the USA under FCC Part 15.
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 (not included). Quartz construction provides excellent frequency stabil-
ity over a wide temperature range.
RF1171
418.0 MHz
SAW Filter
TO39-3 Case
Electrical Characteristics
Characteristic
Nominal Frequency
Insertion Loss
3 dB Bandwidth
Tolerance from 418.0 MHz
Rejection
Temperature
at fC - 21.4 MHz (Image)
at fC - 10.7 MHz (LO)
Ultimate
Operating Case Temp.
Turnover Temperature
Turnover Frequency
Freq. Temp. Coefficient
Frequency Aging
Absolute Value during the First Year
External Impedance Series Inductance
Shunt Capacitance
Lid Symbolization (in addition to Lot and/or Date Codes)
Sym
fc
fc
IL
BW3
TC
TO
fO
FTC
|fA|
L
C
Notes
1, 2
1
1, 2
1
3, 4
5
1
Minimum
Typical
Maximum
417.920
418.080
±80
3.0 5.5
500 600 800
40 50
15 30
80
-35 +85
15 25 35
fC
0.032
10
6 Turns of 0.3 mm Insulated Copper, 1.9 mm ID
12
RFM RF1171
Units
MHz
dB
dB
kHz
dB
°C
°C
MHz
ppm/°C2
ppm/yr
nH
pF
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 test system with
VSWR 1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, fc. Note that insertion loss, bandwidth,
and passband shape are dependent on the impedance matching component values and quality.
2. The frequency fc is defined as the midpoint between the 3dB frequencies.
3. Unless noted otherwise, specifications apply over the entire specified operating temperature range.
4. The turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fo. The nominal frequency at any case temperature, Tc, may
be calculated from: f = fo [1 - FTC (To - Tc)2].
5. 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.
6. The design, manufacturing process, and specifications of this device are subject to change without notice.
7. One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending.
8. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale.
RF Monolithics, Inc. Phone: (972) 233-2903
Fax: (972) 387-9148
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.
http://www.rfm.com
RF1171-082201
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