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Preliminary
SF2125D
?
Low Insertion Loss
?
?
?
3.8 x 3.8 x 1.2 mm Surface-Mount Case
Differential or Single-Ended Operation
Complies with Directive 2002/95/EC (RoHS)
Pb
305.00 MHz
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Maximum DC Voltage Between any Two Terminals
Storage Temperature Range
Value
+10
30
-40 to +85
Units
dBm
VDC
°C
Suitable for Lead-free Soldering - Maximum Soldering Profile
260°C for 30 s
SM3838-8
Electrical Characteristics
Characteristic
Center Frequency
Insertion Loss
Sym
f C
IL
Notes
1
Min
Typ
305
8.5
Max
11.5
Units
MHz
dB
3 dB Bandwidth
5
7.5
MHz
40 dB Bandwidth
14
26
MHz
Amplitude Ripple (p-p) f C ±2.5 MHz
1
0.7
1.5
dB
Low Side Attenuation (f C - 8.2 MHz)
30
Low Side Attenuation (f C - 7.8 MHz)
High Side Attenuation (f C + 7.8 MHz)
25
25
dB
High Side Attenuation (f C + 8.2 MHz)
Temperature Coefficient of Frequency
30
-18 ppm/K
Delay Ripple (p-p) f C ±2.5 MHz
Group Delay in Passband
1, 2, 3
50
350
ns
Case Style
Lid Symbolization (Y=year, WW=week, S=shift) See note 4
6
SM3838-8 3.8 x 3.8 mm Nominal Footprint
TBD YWWS
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
Unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified demonstration board with impedance
matching to 50 ? and measured with 50 ? 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 design, manufacturing process, and specifications of this filter are subject to change.
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 2008, RF Monolithics Inc.
www.RFM.com E-mail: info@rfm.com
?2008 by RF Monolithics, Inc.
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SF2125D - 7/30/08
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