Preliminary
®
SF2125D
305.00 MHz
Pb
•
•
•
•
Low Insertion Loss
3.8 X 3.8 X 1.2 mm Surface-Mount Case
Differential 750 Ohm IN and 900 Ohm Out
Complies with Directive 2002/95/EC (RoHS)
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Max. DC voltage between any 2 terminals
Storage Temperature Range
Suitable for lead-free soldering - Max Soldering Profile
Value
+10
30
-40 to +85
260°C for 30 s
Units
dBm
VDC
°C
SM3838-8
Electrical Characteristics
Characteristic
Center Frequency
Insertion Loss
Amplitude Ripple (p-p)
fc-2.5 to fc+2.5
Low Side Attenuation (fc-8.2 MHz)
Low Side Attenuation (fc-7.8 MHz)
High Side Attenuation (fc-7.8 MHz)
High Side Attenuation (fc-8.2 MHz)
Temperature Coefficient of frequency
Delay Ripple (p-p)
fc-2.5 to fc+2.5 MHz
Group Delay in Passband
Case Style
Lid Symbolization (Y=year, WW=week, S=shift) See note 4
Sym
f
C
IL
Notes
1
1
30
25
25
30
Min
Typ
305
8.5
0.7
Max
Units
MHz
dB
dB
1.5
dB
1, 2, 3
6
-18
ppm/K
50
ns
350
SM3838-8 3.8 x 3.8 mm Nominal Footprint
TBD YWWS
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 Applica-
tion Note No. 42 for details.
4. The design, manufacturing process, and specifications of this filter
are subject to change.
5.
6.
7.
8.
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.
©Copyright 1999, RF Monolithics Inc.
Electrostatic Sensitive Device. Observe precautions for handling.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
SF2125D-101106 Ver 0.1
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