SF2188D
• No External Matching Required
• 3.8 x 3.8 x 1.4 mm Surface-mount Package
• Complies with Directive 2002/95/EC (RoHS)
Pb
Value
+10
3
-40 to +85
260°C for 30 s
340 MHz
SAW Filter
Units
dBm
VDC
°C
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Maximum DC Voltage between any Two Terminals
Storage Temperature Range
Suitable for Lead-free Soldering - Maximum Soldering Profile
SM3838-8
Electrical Characteristics
Characteristic
Nominal Center Frequency
Insertion Loss
1 dB Bandwidth
Passband Ripple, 336 to 344 MHz
Absolute Attenuation (referenced from 0 dB)
10 to 300 MHz
300 to 320 MHz
375 to 800 MHz
Frequency Temperature Coefficient
Source Impedance
Load Impedance
Operating Temperature Range
Case Style
Lid Symbolization (Y=year, WW=week, S=shift)
Sym
F
C
IL
Notes
1
1
1
1
2
2
2
Min
339
Typ
340
2.0
8
0.4
54
47
45
-36
50
50
Max
341
3.0
11
1.0
Units
MHz
dB
MHz
dB
P-P
dB
dB
dB
ppm/°C
ohm
ohm
°C
50
40
40
-40
+85
SM3838-8 3.8 x 3.8 mm Nominal Footprint
RFM 876 YWWS
Electrical Connections
Connection
Port 1
Port 2
Case Ground
Terminals
2
6
All others
5 0 o h m
2
5 .
& & ,
6
5 0 o h m
1 , 3 , 4 , 5 , 7 , 8
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
Unless noted otherwise, all specifications apply over the operating temper-
ature 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 absolute attenuation (0 dB reference). Rejection
in final user application is dependent on PCB layout and external
impedance matching design. See Application Note No. 42 for details.
"LRIP" or "L" after the part number indicates "low rate initial production"
and "ENG" or "E" indicates "engineering prototypes."
5.
6.
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.
RFM, stylized RFM logo, and RF Monolithics, Inc. are registered
trademarks of RF Monolithics, Inc.
7.
8.
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
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SF2188D - 2/5/09
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