Preliminary
SF2079E
• Low Insertion Loss
• 3.0 X 3.0 X 1.2 mm Surface-mount Case
• Differential Input and Output
• Complies with Directive 2002/95/EC (RoHS)
251.045 MHz
SAW Filter
Pb
Absolute Maximum Ratings
Rating
Value
+10
Units
dBm
VDC
°C
Maximum Incident Power in Passband
DC Voltage on any Non-ground Terminal
Operating Temperature Range
30
-40 to +85
-60 to +95
Storage Temperature Range
°C
Suitable for Lead-free Soldering - Maximum Soldering Profile
260 °C for 30 s
SM3030-8
Electrical Characteristics
Characteristic
Sym
Notes
Min
Typ
251.045
12.5
Max
Units
MHz
dB
Center Frequency
f
C
1
Insertion Loss
IL
15.0
Amplitude Ripple
fc - 6.2500 to fc - 4.3925 MHz
1.3
0.5
0.5
0.7
0.6
0.9
13.4
14.1
38
2.0
1.5
1.5
1.5
1.5
2.5
fc - 4.3925 to fc - 2.5350 MHz
fc - 2.5350 to fc - 0.0250 MHz
dB
P-P
fc + 0.0250 to fc + 2.5350 MHz
fc + 2.5350 to fc + 4.3925 MHz
fc + 4.3925 to fc + 6.2500 MHz
1.5 dB Bandwidth centered at fc
3.0 dB Bandwidth centered at fc
Low Side Attenuation < 234.545 MHz ( < fc - 16.5 MHz)
Low Side Attenuation, 234.545 to 240.545 MHz (fc - 10.5 MHz)
High Side Attenuation, 260.045 to 267.545 MHz (fc + 9.0 MHz)
High Side Attenuation > 267.545 MHz ( > fc + 16.5 MHz)
Temperature Coefficient of frequency
Group Delay Ripple
1, 2
MHz
35
32
14
30
34
dB
26
35
-18
ppm/K
fc - 6.2500 to fc - 4.3925 MHz
1, 2, 3
44
37
90
70
fc - 4.3925 to fc - 2.5350 MHz
fc - 2.5350 to fc - 0.0250 MHz
39
120
120
70
ns
P-P
fc + 0.0250 to fc + 2.5350 MHz
fc + 2.5350 to fc + 4.3925 MHz
fc + 4.3925 to fc + 6.2500 MHz
Source/Load Impedance
40
34
37
90
150
ohms
Case Style
SM3030-8 3.0 x 3.0 mm Nominal Footprint
TBD YWWS
6
Lid Symbolization (YY=year, WW=week, S=shift) See note 4
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
and external impedance matching design. See Application Note No. 42
for details.
Notes:
1.
Unless noted otherwise, all specifications apply over the operating
4.
The design, manufacturing process, and specifications of this filter are
subject to change.
temperature range with filter soldered to the specified demonstration
board with impedance matching to 50 Ω and measured with 50 Ω network
analyzer.
5.
6.
7.
Tape and Reel Standard Per ANSI / EIA 481.
US and international patents may apply.
RFM, stylized RFM logo, and RF Monolithics, Inc. are registered
trademarks of RF Monolithics, Inc.
2.
3.
Unless noted otherwise, all frequency specifications are referenced to the
nominal center frequency, fc.
Rejection is measured as attenuation below the minimum IL point in the
passband. Rejection in final user application is dependent on PCB layout
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SF2079E - 7/21/10
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