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| 型号： | RF1295C |
| 厂商： | RFM |
| 文件页数： | 1/2页 |
| 文件大小： | 0K |
| 描述： | SAW FILTER 451.35MHZ SM5050-8 |
| 标准包装： | 500 |
| 频率： | 451.35MHz 中心 |
| 带宽： | 1MHz |
| 滤波器类型： | 带通 |
| 插入损耗： | 2.5dB |
| 应用： | 远程控制 |
| 封装/外壳： | 8-SMD，无引线 |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 高度（最大）： | 0.067"（1.70mm） |
| 尺寸/尺寸： | 0.197" L x 0.197" W（5.00mm x 5.00mm） |
RF1295C
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Ideal Front-End Filter for 451.35 MHz Wireless Receivers
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?
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Low-Loss Coupled-Resonator Quartz Design
Simple External Impedance Matching
Complies with Directive 2002/95/EC (RoHS)
Pb
451.35 MHz
SAW Filter
The RF1295C is a low-loss, compact, and economical surface acoustic wave (SAW) filter
designed to provide front-end selectivity in 451.35 MHz receivers. Recevier 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 (not included).
SM5050-8 Case
5x5
Electrical Characteristics
Characteristic
Center Frequency at
25°C
Insertion Loss
Nominal Frequency
Sym
f nom
IL
Notes
1, 3, 4, 5
3, 6
Minimum
Typical
451.35
2.5
Maximum
5.0
Units
MHz
dB
3 dB Bandwidth Passband
Rejection
at f c - 21.4 MHz (Image)
at f c - 10.7 MHz (LO)
BW 3
2, 3, 6
3
700
35
15
1000
45
30
kHz
dB
Ultimate
80
Temperature
Operating Case Temperature
T C
-40
+85
°C
Turnover Temperature
Turnover Frequency
T O
f O
2, 6
15
25
f nom
40
°C
MHz
Frequency Temperature Coefficent
FTC
0.032
ppm/°C 2
Frequency Aging
External Impedance
Absolute Value during the 1
Series Inductance
st
Year
|fA|
L
2
6
<±10
27
ppm/yr
nH
Shunt Capacitance
Shunt Capacitance
C 1
C 2
6
6
5.6
8.2
pF
pF
Lid Symbolization (Y=year, WW=week, D=day of week)
482 // YWWS
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
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 ? test system with
VSWR ≤ 1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f c . Note that insertion loss and band-
width are dependent on the impedance matching component values and quality.
The frequency f c is defined as the midpoint between the 3dB frequencies.
Where noted, specifications apply over the entire specified operating temperature range.
The turnover temperature, T O , is the temperature of maximum (or turnover) frequency, f o ,. The nominal frequency at any case temperature, T C , may
be calculated from: f=f o [1 - FTC (T O - T C ) 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 Per ANSI / EIA 481.
www.RFM.com E-mail: info@rfm.com
?2008 by RF Monolithics, Inc.
Page 1 of 2
RF1295C - 3/21/08
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