SF2079D Datasheet, PDF (1/5 Pages) RF Monolithics, Inc – 251.045 MHz SAW Filter

®
• Low Insertion Loss
• 3.8 X 3.8 mm Surface-Mount Case
• Single Ended Input and Output
• Complies with Directive 2002/95/EC (RoHS) Pb
SF2079D
251.045 MHz
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Max. DC voltage between any 2 terminals
Storage Temperature Range
Suitable for lead-free soldering - Max Soldering Temperature
Value
Units
+13
dBm
30
VDC
-40 to +85
°C
260°C for 30 s
SM3838-8
Electrical Characteristics
Characteristic
Nominal Center Frequency
Insertion Loss
Amplitude Ripple (p-p)
Fc-6.250 to Fc-4.3925 MHz
Fc-4.3925 to Fc-2.535 MHz
Fc-2.5350 to Fc-0.025 MHz
Fc+0.025 to Fc+2.535 MHz
Fc+2.5350 to Fc+4.3925 MHz
Fc+4.3925 to Fc+6.250 MHz
Pass bandwidth of -1.5dB
Pass bandwidth of -3dB
Low side attenuation Fc<(Fc-16.5 MHz)
Low side attenuation between: (Fc-16.5 MHz)...(Fc-10.5 MHz)
High side attenuation between: (Fc+9.0 MHz)...(Fc+16.5 MHz)
High side attenuation Fc>(Fc+16.5 MHz)
Temperature Coefficient of frequency
Delay Ripple (p-p)
Fc-6.250 to Fc-4.3925 MHz
Fc-4.3925 to Fc-2.535 MHz
Fc-2.5350 to Fc-0.025 MHz
Fc+0.025 to Fc+2.535 MHz
Fc+2.5350 to Fc+4.3925 MHz
Fc+4.3925 to Fc+6.250 MHz
Terminating Source / Load Impedance: Z_IN / Z_OUT
Operating Temperature Range
Case Style
Lid Symbolization (Y=year, WW=week, S=shift)
Sym
f_C
Notes
1
Min
Typ
Max
251.045
Units
MHz
1
15.5
17.5
dB
0.7
1.5
dB
0.5
1.5
dB
0.8
1.5
dB
0.9
1.5
dB
0.5
1.5
dB
0.6
1.5
dB
13.9
MHz
14.5
MHz
33
37
dB
28
32
dB
24
30
dB
35
40
dB
-18
ppm/K
45
70
ns
25
70
ns
20
90
ns
15
90
ns
25
70
ns
45
90
ns
150
Ohms
-40
+85
°C
SM3838-8 3.8 x 3.8 mm Nominal Footprint
RFM TBD YWWS
Notes:
1. Unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified demonstration board with impedance matching to
50 Ω and measured with 50 Ω network analyzer.
2. Rejection is measured as attenuation below the minimum IL point in the passband. Rejection in final user application is dependent on PCB layout and external impedance
matching design. See Application Note No. 42 for details.
3. The design, manufacturing process, and specifications of this filter are subject to change.
4. Tape and Reel Standard ANSI / EIA 481.
5. 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.
6. US and international patents may apply.
7. RFM, stylized RFM logo, and RF Monolithics, Inc. are registered trademarks of RF Monolithics, Inc.
8. ©Copyright 1999, RF Monolithics Inc.
9. Electrostatic Sensitive Device. Observe precautions for handling.
RF Monolithics, Inc. Phone: [phone]
Fax: [phone]
RFM Europe
Phone: [phone]
Fax: [phone]
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [e-mail]
http://www.rfm.com
SF2079D-060607
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