SF1081A-1 Datasheet, PDF (1/3 Pages) RF Monolithics, Inc – 71.00 MHz SAW Filter

• Designed for GSM BTS Receiver IF Applications
• Simple External Impedance Matching
• Hermetic SMP-87 Surface-mount Case
• Unbalanced Input and Output
• Extended Temperature Range Version of SF1081A
• Complies with Directive 2002/95/EC (RoHS)
Pb
SF1081A-1
71.00 MHz
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Maximum DC Voltage on any Non-ground Terminal
Storage Temperature Range
Suitable for Lead-free Soldering - Maximum Soldering Profile
Electrical Characteristics
Characteristic
Nominal Center Frequency
Passband
Insertion Loss at fc
3 dB Passband
Amplitude Ripple over fc ±80 kHz
Group Delay Variation over fc ±50 kHz
Absolute Group Delay
Rejection
fc-600 to fc-400 and fc+400 to fc+600 kHz
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
Operating Temperature Range
Impedance Matching to 50 Ω unbalanced
Case Style
Lid Symbolization (YY=year, WW=week)
Value
Units
+10
dBm
30
VDC
-40 to +85
°C
260 °C for 30 s
SMP-87
Sym
f_C
IL
BW₃
GDV
GD
T_A
Notes
1
1, 2
Min
±100
25
35
1, 2, 3
40
35
1
-40
Typ
71.000
6
±140
300
2.8
26
40
45
50
Max
8.0
±200
1.5
1000
+85
External L-C
SMP-87 22.1 X 8 mm Nominal Footprint
RFM SF1081A-1 YYWW
Units
MHz
dB
kHz
dB_P-P
ns_P-P
µs
dB
°C
In p u t
50 ohm
220 nH
56 pF
S F 1 0 8 1 A -1 M a tc h in g C ir c u it
33 nH

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S F 1 0 8 1 A -1
T o p V ie w

33 nH
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#
220 nH
82 pF
O u tp u t
50 ohm
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 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 Application Note No. 42
for details.
4. "LRIP" or "L" after the part number indicates "low rate initial production"
and "ENG" or "E" indicates "engineering prototypes."
5. The design, manufacturing process, and specifications of this filter are
subject to change.
6. 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.
7. US and international patents may apply.
8. RFM, stylized RFM logo, and RF Monolithics, Inc. are registered
trademarks of RF Monolithics, Inc.
www.RFM.com E-mail: [e-mail]
©2008-2010 by RF Monolithics, Inc.
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SF1081A-1 - 7/12/10