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SF1081A-1
?
Designed for GSM BTS Receiver IF Applications
?
?
Simple External Impedance Matching
Hermetic SMP-87 Surface-mount Case
71.00 MHz
?
?
?
Unbalanced Input and Output
Extended Temperature Range Version of SF1081A
Complies with Directive 2002/95/EC (RoHS)
Pb
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Maximum DC Voltage on any Non-ground Terminal
Storage Temperature Range
Value
+10
30
-40 to +85
Units
dBm
VDC
°C
Suitable for Lead-free Soldering - Maximum Soldering Profile
Electrical Characteristics
260 °C for 30 s
SMP-87
Characteristic
Sym
Notes
Min
Typ
Max
Units
Nominal Center Frequency
Passband
Insertion Loss at fc
3 dB Passband
Amplitude Ripple over fc ±80 kHz
Group Delay Variation over fc ±50 kHz
f C
IL
BW 3
GDV
1
1, 2
±100
71.000
6
±140
300
8.0
±200
1.5
1000
MHz
dB
kHz
dB P-P
ns P-P
Absolute Group Delay
GD
2.8
μs
Rejection
fc-600 to fc-400 and fc+400 to fc+600 kHz
25
26
fc-1.0 to fc-0.6 and fc+0.6 to fc+1.8 MHz
69.6 to 70.0 MHz
31 to 69.6 and 71.8 to 111 MHz
1, 2, 3
35
40
35
40
45
50
dB
Operating Temperature Range
T A
1
-40
+85
°C
Impedance Matching to 50 ? unbalanced
Case Style
Lid Symbolization (YY=year, WW=week)
External L-C
SMP-87 22.1 X 8 mm Nominal Footprint
RFM SF1081A-1 YYWW
S F 1 0 8 1 A -1 M a tc h in g C ir c u it
    ' & % $
3 3 n H
2 2 0 n H
8 2 p F
O u tp u t
5 0 o h m
S F 1 0 8 1 A -1
T o p V ie w
In p u t
5 0 o h m
2 2 0 n H
5 6 p F
3 3 n H
 
!
"
#
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Unless noted otherwise, all specifications apply over the operating tem-
perature range with filter soldered to a demonstration board with imped-
ance matching to 50 ? and measured with 50 ? 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.
"LRIP" or "L" after the part number indicates "low rate initial production"
www.RFM.com E-mail: info@rfm.com
?2008-2010 by RF Monolithics, Inc.
5.
6.
7.
8.
and "ENG" or "E" indicates "engineering prototypes."
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.
Page 1 of 3
SF1081A-1 - 7/12/10
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