RFM RF3181E

RF3181E
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Ideal Front-end Filter for 916.5 MHz Wireless Receivers
Low-loss, Coupled-resonator Quartz Design
Simple External Impedance Matching
Complies with Directive 2002/95/EC (RoHS)
Pb
916.5 MHz
SAW Filter
The RF3181E is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 916.5 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz
IF, direct conversion and superregen. Typical applications of these receivers are wireless remote-control and
security, data telemetry, and meter reading devices operating in the USA under FCC Part 15 and in Canada
under DoC RSS-210.
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 (not included).
SM3030-6 Case
3.0 x 3.0
Electrical Characteristics
Characteristic
Center Frequency at 25°C
Sym
fc
Absolute Frequency
Tolerance from 916.50 MHz
Insertion Loss
3 dB Bandwidth
Rejection relative to Min IL:
∆fc
Frequency Aging
Impedance @ fC
Minimum
1, 3
BW3
1, 3
dB
500
750
900
kHz
50
30
35
906 to 910 MHz
25
30
40
50
925 to 933 MHz
15
20
933 to 940 MHz
30
35
940 to 1100 MHz
35
40
3, 4
Absolute Value during the First Year
|fA|
5
Input ZIN = RIN/CIN
ZIN
Output ZOUT = ROUT/COUT
ZOUT
1
Lid Symbolization (in addition to Lot and/or Date Codes)
7 Inch Reel
Standard Reel Quantity
13 Inch Reel
MHz
kHz
40
FTC
Units
4.0
10 to 895 MHz
1, 3
Maximum
2.7
895 to 906 MHz
Freq. Temp. Coefficient
Standard Reel Quantity
Typical
916.5
1, 2, 3
IL
922 to 925 MHz
Temperature
Notes
0.032
≤10
dB
ppm/
°C2
ppm/yr
54.2kΩ || 1.44pF
52.8kΩ || 1.30pF
698 || YWWS
9
500 Pieces/Reel
3000 Pieces/Reel
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
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 and bandwidth and passband shape are dependent on the impedance matching component values and quality.
The frequency fc is defined as the midpoint between the 3dB frequencies.
Where noted specifications apply over the entire specified operating temperature range of -40 to 90 °C.
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].
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 for ANSI/EIA 481.
www.RFM.com E-mail: [email protected]com
©2008-2011 by RF Monolithics, Inc.
Page 1 of 2
RF3181E - 2/10/11
Absolute Maximum Ratings
Rating
Value
Units
14
dBm
Input Power Level
DC Voltage
12
VDC
Storage Temperature
-40 to +125
°C
Operable Temperature Range
-40 to +125
°C
260
°C
Soldering Temperature, 10 seconds / 5 cycles Maximum
Electrical Connections
Pin
1
B
G
C
1
6
A 2
5
3
4
H
6
1
5
2
4
3
Connection
Ground
2
Input
3
Ground
4
Ground
5
Output
6
Ground
E
F
D
I
J
Case Dimensions
Matching Circuit to 50Ω
mm
Dimension
6
12 nH
2.8 nH
12 nH
2
1 pF
1 pF
4
www.RFM.com E-mail: [email protected]
©2008-2011 by RF Monolithics, Inc.
Min
Nom
Max
Min
Nom
Max
2.87
2.87
1.12
0.77
2.67
1.47
0.72
1.37
0.47
1.17
3.0
3.0
1.25
0.90
2.80
1.6
0.85
1.5
0.60
1.30
3.13
3.13
1.38
1.03
2.93
1.73
0.98
1.63
0.73
1.43
0.113
0.113
0.044
0.030
0.105
0.058
0.028
0.054
0.019
0.046
0.118
0.118
0.049
0.035
0.110
0.063
0.033
0.059
0.024
0.051
0.123
0.123
0.054
0.040
0.115
0.068
0.038
0.064
0.029
0.056
1
2.8 nH
5
Inches
3
A
B
C
D
E
F
G
H
I
J
Page 2 of 2
RF3181E - 2/10/11