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参数资料
| 型号： | RF1211 |
| 厂商： | RFM |
| 文件页数： | 1/2页 |
| 文件大小： | 0K |
| 描述： | SAW FILTER 315MHZ TO39-3 |
| 标准包装： | 1,000 |
| 频率： | 315MHz 中心 |
| 带宽： | 700kHz |
| 滤波器类型： | 带通 |
| 插入损耗： | 1.7dB |
| 应用： | 远程无钥匙启动 |
| 封装/外壳： | TO-205AD，TO-39-3 金属罐 |
| 安装类型： | 通孔 |
| 包装： | 带卷 (TR) |
| 高度（最大）： | 0.125"（3.18mm） |
| 尺寸/尺寸： | 0.370" 直径（9.40mm） |
RF1211
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Ideal Front-End Filter for USA Automotive Wireless Receivers
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Low-Loss, Coupled-Resonator Quartz Design
Simple External Impedance Matching
Rugged TO39 Hermetic Package
Complies with Directive 2002/95/EC (RoHS)
Pb
315.0 MHz
SAW Filter
The RF1211 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed
to provide front-end selectivity in 315.0 MHz receivers. Receiver 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 (especially for automotive
keyless entry) operating in the USA under FCC Part 15, in Canada under DOC RSS-210, and in
Italy.
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). Quartz
construction provides excellent frequency stability over a wide temperature range.
Electrical Characteristics
TO39-3 Case
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency at 25°C
Insertion Loss
3 dB Bandwidth
Absolute Frequency
Tolerance from 315.0 MHz
f c
? fc
IL
BW 3
1, 2
1
1, 2
314.92
500
315.00
1.7
700
315.080
±80
3.0
800
MHz
dB
dB
kHz
Rejection
at f c - 21.4 MHz (Image)
40
50
at f c - 10.7 MHz (LO)
1
15
40
dB
Ultimate
80
Temperature
Operating Case Temp.
T C
-40
+85
°C
Turnover Temperature
Turnover Frequency
T O
f O
3, 4
22
37
f c
52
°C
MHz
Freq. Temp. Coefficient
FTC
0.032
ppm/°C 2
Frequency Aging
External Impedance
Absolute Value during the First Year
Series Inductance
Shunt Capacitance
|fA|
L
C
5
1
≤ 10
86 nH (Pin 1), 82 nH (Pin 2)
9
ppm/yr
pF
Lid Symbolization (in addition to Lot and/or Date Codes)
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
RFM RF1211
1.
2.
3.
4.
5.
6.
7.
8.
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, bandwidth,
and passband shape are dependent on the impedance matching component values and quality.
The frequency f c is defined as the midpoint between the 3dB frequencies.
Unless noted otherwise, 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 without notice.
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.
www.RFM.com E-mail: info@rfm.com
?2008 by RF Monolithics, Inc.
Page 1 of 2
RF1211 - 3/21/08
相关PDF资料 |
PDF描述 |
|---|---|
| RF1238 | SAW FILTER 318MHZ TO39-3 |
| RF1284 | SAW FILTER 319.508MHZ TO39-3 |
| RF1295C | SAW FILTER 451.35MHZ SM5050-8 |
| RF1301 | SAW FILTER 499.25MHZ TO39-3 |
| RF1353C | SAW FILTER 345MHZ SM5050-8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RF1211-000 | 制造商:TE Connectivity 功能描述:SURGE PROTECTOR 170V SMA 50A |
| RF1211B | 制造商:RFM 制造商全称:RF Monolithics, Inc 功能描述:315.0 MHz SAW Filter |
| RF1211C | 功能描述:信号调节 315.00MHz Narrowband Receiver Front End RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel |
| RF1211D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:315.0 MHz SAW Filter |
| RF1212-000 | 制造商:TE Connectivity 功能描述:SURGE PROTECTOR 220V SMA 50A |
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