www.RFM.com E-mail: info@rfm.com Page 1 of 4
©2008 by RF Monolithics, Inc. RF3171D - 3/21/08
Electric al Char ac teristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency FC1, 2, 3 418.0 MHz
Minimum I.L. ILmin 1, 3 1.6 2.5 dB
Pass bandwidth (relative to ILmin)BW
3
1, 3 500 620 800 kHz
Attenuation: (relative to ILmin) 10.00 - 400.00 MHz
1, 3
50 60
dB
400.00 - 413.00 MHz 30 35
413.00 - 417.00 MHz 13 15
419.00 - 426.00 MHz 10 11
426.00 - 435.00 MHz 35 38
435.00 - 1000 MHz 50 56
Impedance at FC ; Input ZIN=RIN//CIN 12.58 kΩ // 3.37 pF Ω//pF
Impedance at FC ; Output ZOUT=ROUT//COUT 1.92 kΩ // 3.55 pF Ω//pF
Frequency Aging Absolute Value during the First Year |fA| 5 ≤10 ppm/yr
Lid Symbolization (in addition to Lot and/or Date Codes) 775 YWWS
St andard Reel Quantity Reel Size 7 Inch 9500 Pieces/Reel
Reel Size 13 Inch 3000 Pieces/Reel
• Ideal Front-End Filter for Wireless Receiver in the US and UK
• Low-Loss, Coupled-Resonator Quartz Design
• Surface-Mount Ceramic Case with 50 mm
2
Footprint
• Simple External Impedance Matching
• Complies with Directive 2002/95/EC (RoHS)
The RF3171D 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
or 500 kHz IF, direct conversion and superregen. T ypical 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
advanced SAW design and fabrication technology is utilized to achieve high performance and very low loss
with simple external impedance matching.
418.0 MHz
SAW Filter
RF3171D
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. (-40 to +90°C)
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-T
c
)
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.
9. Tape and Reel Standard Per ANSI / EIA 481.
SM3838- 8 Case
3.8 x 3.8
Pb
www.RFM.com E-mail: info@rfm.com Page 2 of 4
©2008 by RF Monolithics, Inc. RF3171D - 3/21/08
CH1 S21 LOG 1 dB/ REF -3 dB
CH1 CENTER 418 . 000 000 MHz SPAN 2. 000 000 MHz
C
CH2 S21 LOG 10 dB/ REF -30 dB
CH2 START 408 . 000 000 MHz STOP 428 . 000 000 MHz
Cor
7 Jun 2007 08:16:40
1
2
3 4
1 : 0. 0000 dB 0. 000 000 MHz
Max REF=1
CH1 Markers
BW: . 655527 MHz
cent : 417 . 988236 MHz
Q: 637 . 64
1_ loss : -1 . 6291 dB
1
2
3
4
1 : 0. 0000 dB 0. 000 000 MHz
Max REF=1
CH2 Markers
BW: . 655868 MHz
cent : 417 . 987911 MHz
Q: 637 . 30
1_ loss : -1 . 6226 dB
RF3171D
demo 96
Full
Full
www.RFM.com E-mail: info@rfm.com Page 3 of 4
©2008 by RF Monolithics, Inc. RF3171D - 3/21/08
CH1 S11 1 U FS
CENTER 418 . 000 000 MHz SPAN 20 . 000 000 MHz
Cor
CH3 S22 1 U FS
Cor
7 Jun 2007 08:14:41
1
1 : 46 . 314 -15 . 008 25 . 370 pF 418 . 000 000 MHz
1
1 : 39 . 561 -1 . 4668 259 . 58 pF 418 . 000 000 MHz
RF3171D
demo 96
Full
www.RFM.com E-mail: info@rfm.com Page 4 of 4
©2008 by RF Monolithics, Inc. RF3171D - 3/21/08
Absolute Maximum Ratings
Rating Value Units
Input Power Level 10 dBm
DC V oltage 12 VDC
S torage Temperature -40 to +125 °C
Operable Temperature Range -40 to +125 °C
Soldering Temperature (10 sec. max.) 260 °C
Pin Connection
1 Input
2 Input Ground
3 Ground
4 Case Ground
5 Output
6 Output Ground
7 Ground
8 Case Ground
Matching Circuit to 50Ω
Electrical Connections
A
1
2
3
B
7
6
5
4
C
H7
6
5
4
E
F
G
1
2
3
88
D
1
2
3
8
Input
Output
7
6
54
Pin Connection
1 Input Ground
2 Input
3 Input Ground
4 Case Ground
5 Output Ground
6 Output
7 Output Ground
8 Case Ground
Optional
Electrical Connections
7
6
54
1
2
3
8Input
Output
C
C
Matching Circuit to 50Ω
Case Dimensions
4.3 pF
3.3 pF
56 nH
56 nH Dimension mm Inches
Min Nom Max Min Nom Max
A3.6 3.8 4.0 0.14 0.15 0.16
B3.6 3.8 4.0 0.14 0.15 0.16
C1.00 1.20 1.40 0.04 0.05 0.055
D0.95 1.10 1.25 0.033 0.043 0.05
E0.90 1.0 1.10 0.035 0.04 0.043
F0.50 0.6 0.70 0.020 0.024 0.028
G2.39 2.54 2.69 0.090 0.100 0.110
H1.40 1.75 2.05 0.055 0.069 0.080
