Preliminary
SF2185A-1
•
•
•
•
Precision IF SAW Filter
Balanced 50 ohm Operation
Hermetic 13.3 x 6.5 mm Surface-mount Case
Complies with Directive 2002/95/EC (RoHS)
Pb
70.00 MHz
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Maximum DC Voltage Between any Two Terminals
Storage Temperature Range in Tape and Reel
Suitable for Lead-free Soldering - Maximum Soldering Profile
Value
+10
30
-40 to +85
Units
dBm
VDC
°C
SM13365-12
260°C for 30 s
Electrical Characteristics
Characteristic
Center Frequency
Minimum Insertion Loss
1 dB Bandwidth
3 dB Bandwidth
30 dB Bandwidth
Attenuation Referenced to IL
MIN:
50 to 62.5 MHz
62.5 to 63 MHz
77 to 77.5 MHz
77.5 to 90 MHz
Passband Ripple, F
C
± 3.0 MHz
Phase Ripple, F
C
± 4.5 MHz
Group Delay Ripple, F
C
± 4.5 MHz
Operating Temperature
Balanced Source Impedance
Balanced Load Impedance
Frequency Temperature Coefficient
Impedance Matching to 50
Ω
Case Style
Lid Symbolization (YY = year, WW = week)
Sym
F
C
IL
MIN
BW
1
BW
3
BW
30
Notes
1
1
1
1
1
3
3
3
3
1, 2, 3
1
Min
69.5
8.1
9.1
Typ
70.0
10.6
10.2
10.7
12.35
Max
70.5
11.0
Units
MHz
dB
MHz
MHz
13.20
MHz
38
34
26
35
40
40
33.5
38
0.65
12.5
170
1.0
20
200
+80
50
50
-94
dB
P-P
deg
ns
P-P
°C
ohm
ohm
ppm/°C
dB
-20
External Source/Load L-C Networks
SM13365-12 13.3 x 6.5 mm Nominal Footprint
RFM SF2185A1 YYWW
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
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 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.
Part to part absolute delay measurement records the absolute delay mean across 1 dB passband.
"LRIP" or "L" after the part number indicates "low rate initial production" 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.
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
Page 1 of 6
SF2185A-1 - 7/1/09
RFM [ RF MONOLITHICS, INC ]
