- 您现在的位置：买卖IC网 > Datasheet目录699 > RF1408D (RFM)SAW FILTER 447.7MHZ SM3838-8 Datasheet资料下载
参数资料
| 型号： | RF1408D |
| 厂商： | RFM |
| 文件页数： | 1/2页 |
| 文件大小： | 0K |
| 描述： | SAW FILTER 447.7MHZ SM3838-8 |
| 标准包装： | 500 |
| 频率： | 447.7MHz 中心 |
| 带宽： | 840kHz |
| 滤波器类型： | 带通 |
| 插入损耗： | 1.5dB |
| 应用： | 远程无钥匙启动 |
| 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）： | 0.055"（1.40mm） |
| 尺寸/尺寸： | 0.150" L x 0.150" W（3.80mm x 3.80mm） |
Pb
? Ideal Front-End Filter for Domestic Wireless Receivers
? Low-Loss, Coupled-Resonator Quartz Design
? Simple External Impedance Matching
? Complies with Directive 2002/95/EC (RoHS)
The RF1408D is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 447.7 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz
RF1408D
447.7 MHz
SAW Filter
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 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.
SM3838-8 Case
Electrical Characteristics
3.8 x 3.8
Characteristic
Center Frequency at 25°C
Insertion Loss
3 dB Bandwidth
Absolute Frequency
Sym
f c
IL MIN
BW 3
Notes
1, 2, 3
1, 3
1, 3
Minimu
m
500
Typical
447.7
1.5
840
Maximum
2.0
1100
Units
MHz
dB
kHz
Rejection Attenuation: (relative to ILmin)
10 - 409 MHz
409 - 434 MHz
434 - 443 MHz
443 - 445 MHz
45
40
33
20
60
55
35
33
445 - 446.7 MHz
448.7 - 449.7 MHz
449.7 - 456 MHz
456 - 458 MHz
458 - 487 MHz
487 - 1000 MHz
1, 3
9
9
16
31
38
39
12
15
20
38
40
55
dB
Temperature
Freq. Temp. Coefficient
FTC
0.032
ppm/°C 2
Frequency Aging
Impedance @ fc
Absolute Value during the First Year
Input Z IN =R IN llC IN
Output Z OUT =R OUT llC OUT
lfAl
Z IN
Z OUT
5
1
≤ 10
221.86 ? // 1.25pf
172.02 ? // 126.49fF
ppm/yr
Lid Symbolization (Y=year WW=week S=shift)
511 // 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 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.
Where noted specifications apply over the entire specified operating temperature range of -40°C to +90°C.
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
RF1408D - 3/21/08
相关PDF资料 |
PDF描述 |
|---|---|
| RF1411D | SAW FILTER 869.2625MHZ SM3838-8 |
| RF1414D | SAW FILTER 372.5MHZ SM3838-8 |
| RF1417D | NARROWBAND SAW FILTER, SM3838-8 |
| RF1432C | NARROWBAND SAW FILTER, SM5050-8 |
| RF3171D | SAW FILTER 418MHZ SM3838-8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RF1409-000 | 功能描述:可复位保险丝 RoHS:否 制造商:Bourns 电流额定值: 电阻:7.5 Ohms 最大直流电压: 保持电流:0.1 A 安装风格:SMD/SMT 端接类型:SMD/SMT 跳闸电流:0.6 A 引线间隔: 系列:MF-PSHT 工作温度范围:- 40 C to + 125 C |
| RF140-W | 制造商:HellermannTyton 功能描述: |
| RF1410-000 | 功能描述:可复位保险丝 8V 2A-HD 40A MAX (R) RoHS:否 制造商:Bourns 电流额定值: 电阻:7.5 Ohms 最大直流电压: 保持电流:0.1 A 安装风格:SMD/SMT 端接类型:SMD/SMT 跳闸电流:0.6 A 引线间隔: 系列:MF-PSHT 工作温度范围:- 40 C to + 125 C |
| RF1411-000 | 功能描述:可复位保险丝 6V 2.6A-HD 40A MAX (R) RoHS:否 制造商:Bourns 电流额定值: 电阻:7.5 Ohms 最大直流电压: 保持电流:0.1 A 安装风格:SMD/SMT 端接类型:SMD/SMT 跳闸电流:0.6 A 引线间隔: 系列:MF-PSHT 工作温度范围:- 40 C to + 125 C |
| RF1411D | 功能描述:信号调节 869.2625MHz Narrowband 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 |
发布紧急采购，3分钟左右您将得到回复。