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参数资料
| 型号： | SF1197B |
| 厂商： | RFM |
| 文件页数： | 1/4页 |
| 文件大小： | 0K |
| 描述： | SAW FILTER IF 248.6MHZ SMP-03 |
| 标准包装： | 500 |
| 频率： | 248.6MHz 中心 |
| 带宽： | 6.5MHz |
| 滤波器类型： | 带通 |
| 插入损耗： | 3dB |
| 应用： | IF |
| 封装/外壳： | 10-SMD，无引线 |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 高度（最大）： | 0.079"（2.00mm） |
| 尺寸/尺寸： | 0.276" L x 0.197" W（7.00mm x 5.00mm） |
?
SF1197B
?
Small Size
?
?
Hermetic 7 X 5 mm Surface Mount Case
No Matching Required
Input power Level
Input: unsymmetrical
Output: symmetrical
Terminating source impedance:
Terminating load impedance:
Low-Impedance Input: near 50 Ohm
Low-Impedance Output: near 200 Ohm
max. 20 dBm for <= 100 hours
max. 10 dBm for <= 15 years
Zs = 50 Ohm (no matching network)
ZI = 200 Ohm (no matching network)
248.6 MHz
SAW Filter
Operating Temperature
Electrical Characteristics
T = -20 to 80 [°C]
SMP-03
Characteristic
Nominal Center Frequency
Minimal insertion attenuation
Sym
f N
a_min
Notes
1
Min
Typ
248.6
3.0
Max
4
Units
MHz
dB
3 dB Band Width
5.0
6.5
MHz
Amplitude ripple (p - p) [fn ±120 kHz]
Group Delay ripple (p - p) [fn ±120 kHz]
Relative attenuation (relative to amin)
a_rel
0.3
0.5
0.3
dB
μs
10 MHz ....
(fn - 29,2 MHz)
fn + 22,8 MHz
fn + 52,0 MHz
fn + 74,8 MHz
fn + 104,0 MHz
fn + 126,8 MHz
45.0
45.0
45.0
45.0
45.0
45.0
50
50
50
50
50
50
dB
dB
dB
dB
dB
dB
Case Style
Lid Symbolization (Y=year, WW=week, S=shift) See note 3
Notes:
SMP-03 7 X 5 mm Nominal Footprint
RFM SF1197B YWWS
1.
2.
3.
Unless noted otherwise, all specifications apply over the operating temperature
range with filter soldered to the specified demonstration board with impedance
matching to 50 ? and measured with 50 ? network analyzer. A dB offset exists
for RFM because of the loss introduced by using transformers on the Input and
Output.
Rejection is measured as attenuation below the minimum IL point in the pass-
band. Rejection in final user application is dependent on PCB layout and exter-
nal impedance matching design. See Application Note No. 42 for details.
"LRIP" or "L" after the part number indicates "low rate initial production" and
5.
6.
7.
8.
9.
Either Port 1 or Port 2 may be used for either input or output in the design.
However, impedances and impedance matching may vary between Port 1 and
Port 2, so that the filter must always be installed in one direction per the circuit
design.
US and international patents may apply.
RFM, stylized RFM logo, and RF Monolithics, Inc. are registered trademarks of
RF Monolithics, Inc.
?Copyright 1999, RF Monolithics Inc.
Electrostatic Sensitive Device. Observe precautions for handling.
"ENG" or "E" indicates "engineering prototypes."
4.
The design, manufacturing process, and specifications of this filter are subject
to change.
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
Page 1 of 4
?1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
SF1197B-081203
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