SF2244A Datasheet, PDF (1/5 Pages) RF Monolithics, Inc – 225 MHz SAW Filter

Preliminary
• 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)
Pb
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Maximum DC Voltage on any Non-ground Terminal
Storage Temperature Range in Tape and Reel
Suitable for Lead-free Soldering - Maximum Soldering Profile
Value
Units
+18
dBm
10
VDC
-40 to +85
°C
260 °C for 30 s
SF2244A
225 MHz
SAW Filter
SMP-53-S
Electrical Specifications
Characteristic
Center Frequency
Maximum Insertion Loss
Passband Ripple, 223.0 to 227.0 MHz
1 dB Bandwidth
3 dB Bandwidth
45 dB Bandwidth
Rejection Referenced to IL_MIN:
1 to 210 MHz
238 to 400 MHz
Operating Temperature Range
Frequency Temperature Coefficient
Wafer Material
Impedance Matching to 50 Ω Single-ended Source and Load
Case Style
Lid Symbolization (YY = year, WW = week)
Sym Notes
Min
f_C
IL_MAX
1
BW₁
4.0
BW₃
1, 2
-
BW₄₅
-
1, 2, 3
45
45
T_A
1
-20
Typ
225.0
10.0
0.6
5.1
5.7
9.4
53
51
-23
LiTaO₃
Max
12.0
1.0
-
-
10.0
+70
Units
MHz
dB
dB_P-P
MHz
MHz
MHz
dB
°C
ppm/°C
External L-C
SMP-53-S 13.3 x 6.5 mm Nominal Footprint
RFM/SF2244A/YYWW
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
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 turnover temperature, T_O, is the temperature of maximum (or turnover) frequency, f_o. The nominal frequency at any case temperature, T_c, may
be calculated from: f=f_o[1-FTC(T_o-T_c)²].
5. The design, manufacturing process, and specifications of this filter are subject to change.
6. 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.
7. US and international patents may apply.
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©2010 by RF Monolithics, Inc.
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SF2244A - 12/13/10