SF2145B
• SAW Filter, 895 MHz, 15 MHz BW
• 7.0 X 5.0 mm 10 pin Surface-Mount Case
• Complies with Directive 2002/95/EC (RoHS)
895 MHz
SAW Filter
Pb
Absolute Maximum Ratings
Rating
Value
+20
Units
dBm
VDC
°C
Maximum Incident Power in Passband
Maximum DC Voltage Between any Two Terminals
Operating Temperature Range
0
-20 to +70
SMP-03
Electrical Characteristics
Characteristic
Sym
Notes
Min
Typ
Max
Units
f
895
Center Frequency
1
MHz
Ω
C
Source Impedance, single ended
Load Impedance, single ended
1 dB Bandwidth
50
50
Ω
18
MHz
dB
IL
Insertion Loss, 894 to 895.5 MHz
8.5
9.0
0.3
Any point within 894 to 895.5 MHz
measured at a constant temperature with the
RF input level varying from +10 to +20 dBm
Insertion Loss Variation:
∆dB
Amplitude Ripple, 894 to 895.5 MHz
.35
814
10
.75
824
25
dB
ns
Average Group Delay, 894 to 895.5 MHz
Group Delay Variation, 894.0 to 895.5 MHz
804
10
ns
P-P
Input / Output Return Loss at f
15
dB
C
Temperature Coefficient
-18
ppm/K
Case Style
SMP-03 7.0 x 5.0 mm Nominal Footprint
RFM SF2145B YYWW
Lid Symbolization (YY=year, WW=week) See note 4
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 the specified demonstration board
with impedance matching to 50 Ω and measured with 50 Ω network ana-
lyzer.
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.
2.
3.
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.
"LRIP" or "L" after the part number indicates "low rate initial production"
and "ENG" or "E" indicates "engineering prototypes."
7.
8.
4.
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
Page 1 of 5
SF2145B - 7/9/09
RFM [ RF MONOLITHICS, INC ]
