Preliminary
SF2148B
• Designed for TD-SCDMA Applications
• Low Insertion Loss
• 5.0 X 7.0 mm Surface-Mount Case
• Complies with Directive 2002/95/EC (RoHS)
138.24 MHz
SAW Filter
Pb
Absolute Maximum Ratings
Rating
Value
+10
Units
dBm
VDC
°C
Maximum Incident Power in Passband
Maximum DC Voltage Between any Two Terminals
Storage Temperature Range in Tape and Reel
Maximum Soldering Profile
30
-40 to +85
265 °C for 10 s
SMP-03-S
Electrical Characteristics
Characteristic
Sym
Notes
Min
Typ
Max
Units
Nominal Center Frequency
f
138.24
MHz
dB
C
1
Insertion Loss at f
IL
10.5
C
1 dB Passband, 128.24 to 148.24 MHz
Amplitude Ripple over 20 MHz Passband
Group Delay Ripple over 20 MHz Passband
Rejection:
BW
20
MHz
1
1, 2
1
dB
P-P
P-P
GD
50
ns
P-P
0 to 108.24 MHz
54
50
45
50
40
12
35
-40
108.24 to 117.52 MHz
1, 2, 3
dBc
122.88 MHz
220.4 to 271.12 MHz
271.12 to 1000 MHz
1 dB Compression
dBm
dBm
°C
Input IP3
Operating Temperature Range
Input/Output Impedance
Case Style
T
1
+85
A
200 ohms balanced or 50 ohms unbalanced
SMP-03-S 7 x 5 mm Nominal Footprint
RFM SF2148B YYWWS
6
Lid Symbolization (YY=year, WW=week, S=shift) See note 4
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. The design, manufacturing process, and specifications of this filter are subject to change.
4. 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.
5. US and international patents may apply.
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©2008 by RF Monolithics, Inc.
Page 1 of 5
SF2148B - 7/9/09
RFM [ RF MONOLITHICS, INC ]
