Preliminary
SF2244A
•
•
•
•
•
Low Insertion Loss
Excellent Size-to-performance Ratio
Hermetic 13.3 x 6.5 mm Surface-mount Case
Single-ended Input and Output
Complies with Directive 2002/95/EC (RoHS)
225 MHz
SAW Filter
Pb
Absolute Maximum Ratings
Rating
Value
Units
Maximum Incident Power in Passband
+18
dBm
Maximum DC Voltage on any Non-ground Terminal
10
VDC
-40 to +85
°C
Storage Temperature Range in Tape and Reel
Suitable for Lead-free Soldering - Maximum Soldering Profile
260 °C for 30 s
SMP-53-S
Electrical Specifications
Characteristic
Sym
Center Frequency
fC
Maximum Insertion Loss
ILMAX
Notes
Min
Typ
Max
225.0
1
Units
MHz
10.0
Passband Ripple, 223.0 to 227.0 MHz
12.0
dB
dBP-P
0.6
1.0
4.0
5.1
-
MHz
-
5.7
-
MHz
-
9.4
10.0
MHz
1 to 210 MHz
45
53
238 to 400 MHz
45
51
1 dB Bandwidth
BW1
3 dB Bandwidth
BW3
45 dB Bandwidth
BW45
Rejection Referenced to ILMIN:
Operating Temperature Range
1, 2
1, 2, 3
TA
1
-20
Frequency Temperature Coefficient
+70
-23
°C
ppm/°C
LiTaO3
Wafer Material
Impedance Matching to 50 Ω Single-ended Source and Load
Case Style
dB
External L-C
SMP-53-S 13.3 x 6.5 mm Nominal Footprint
Lid Symbolization (YY = year, WW = week)
RFM/SF2244A/YYWW
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
5.
6.
7.
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.
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
and external impedance matching design. See Application Note No. 42 for details.
The turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fo. The nominal frequency at any case temperature, Tc, may
be calculated from: f=fo[1-FTC(To-Tc)2].
The design, manufacturing process, and specifications of this filter are subject to change.
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.
www.RFM.com E-mail: info@rfm.com
©2010 by RF Monolithics, Inc.
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SF2244A - 12/13/10
