RF1171 查看數據表（PDF） - RF Monolithics, Inc
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RF1171 Datasheet PDF : 2 Pages
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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)
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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 receiv-
ers are wireless remote-control and security devices operating in the USA under FCC Part 15.
RF1171
418.0 MHz
SAW Filter
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 perfor-
mance and very low loss with simple external impedance matching (not included). Quartz con-
struction provides excellent frequency stability over a wide temperature range.
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
Δfc
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 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, 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.
www.RFM.com E-mail: info@rfm.com
©2008 by RF Monolithics, Inc.
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RF1171 - 3/20/08
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