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

Preliminary
SF2079D-1
• Low Insertion Loss
• 3.8 X 3.8 X 1 mm Surface-Mount Case
• Differential Input and Output
• Complies with Directive 2002/95/EC (RoHS)
Pb
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Maximum DC Voltage Between any Two Terminals
Operating Temperature Range
Storage Temperature Range
Suitable for Lead-free Soldering - Maximum Soldering Profile
Value
+10
Units
dBm
30
VDC
-40 to +85
°C
-60 to +95
°C
260°C for 30 s
251.045 MHz
SAW Filter
SM3838-8
Electrical Characteristics
Characteristic
Center Frequency
Insertion Loss
Amplitude Ripple (p-p)
1.5 dB Passband Width Centered at fc
fc - 6.2500 to fc - 4.3925 MHz
fc - 4.3925 to fc - 2.5350 MHz
fc - 2.5350 to fc - 0.0250 MHz
fc + 0.0250 to fc + 2.5350 MHz
fc + 2.5350 to fc + 4.3925 MHz
fc + 4.3925 to fc + 6.2500 MHz
3.0 dB Passband Width 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
Delay Ripple (p-p)
fc - 6.2500 to fc - 4.3925 MHz
fc - 4.3925 to fc - 2.5350 MHz
fc - 2.5350 to fc - 0.0250 MHz
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
Case Style
Lid Symbolization (YY=year, WW=week, S=shift) See note 4
Sym
f_C
IL
Notes
1
1, 2
1, 2, 3
6
Min
Typ
Max
Units
251.045
MHz
13.0
15.0
dB
0.90
1.75
0.60
1.50
0.60
0.80
1.50
dB
1.50
0.80
1.75
0.60
1.75
13.5
14.2
MHz
32
29
dB
18
32
-18
ppm/K
84
150
35
70
22
120
ns
58
120
37
70
52
110
150
ohms
SM3838-8 3.8 x 3.8 mm Nominal Footprint
827 YWWS
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
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. Unless noted otherwise, all frequency specifications are referenced to the
nominal center frequency, fc.
3. 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.
4. The design, manufacturing process, and specifications of this filter are
subject to change.
5. Tape and Reel Standard Per ANSI / EIA 481.
6. US and international patents may apply.
7. RFM, stylized RFM logo, and RF Monolithics, Inc. are registered
trademarks of RF Monolithics, Inc.
www.RFM.com E-mail: [e-mail]
©2009 by RF Monolithics, Inc.
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SF2079D1 - 4/17/09