SF2025D Datasheet, PDF (1/5 Pages) RF Monolithics, Inc – 259.861 MHz SAW Filter

Preliminary
• Designed for SDARS Receiver IF Application
• Low Insertion Loss
• 3.8 X 3.8 mm Surface-Mount Case
• Differential Input and Output
• Complies with Directive 2002/95/EC (RoHS) Pb
SF2025D
259.861 MHz
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Max. DC voltage between any 2 terminals
Storage Temperature Range
Suitable for lead-free soldering - Max Soldering Temperature
Value
Units
+10
dBm
30
VDC
-40 to +105
°C
260°C for 30 s
SM3838-8
Electrical Characteristics
Characteristic
Nominal Center Frequency
Passband
Minimum Insertion Loss
1.5 dB Passband
3 dB Passband
Amplitude Ripple from fc-6.354 MHz to fc-4.2885 MHz (-20 to 85°C)
Amplitude Ripple from fc-6.354 MHz to fc-4.2885 MHz (-40 to -20°C)
Amplitude Ripple from fc-4.4965 MHz to fc-2.431 MHz
Amplitude Ripple from fc-2.639 MHz to fc+0.079 MHz
Amplitude Ripple from fc-0.079 MHz to fc+2.639 MHz
Amplitude Ripple from fc+2.431 MHz to fc+4.4965 MHz
Amplitude Ripple from fc+4.2885 MHz to fc+6.354 MHz (-40 to 60°C)
Amplitude Ripple from fc+4.2885 MHz to fc+6.354 MHz (60 to 85°C)
Group Delay Variation over fc-6.354 MHz to fc-2.431 MHz
and from fc+2.431 MHz to fc+6.354 MHz
Group Delay Variation over fc±2.639 MHz
Rejection
fc-28 to fc-12 MHz and fc+12 to fc+33 MHz
fc-12 to fc-10.5 MHz
fc+9 to fc+12 MHz
Operating Temperature Range
Frequency Temperature Coefficeint
Differential Input and Output Impedance
Case Style
Lid Symbolization (YY=year, WW=week, S=shift)
Sym
f_C
IL
BW_1.5
BW₃
GDV1
GDV2
T_A
Notes
1
1, 2
1, 2, 3
1
7
Min
Typ
Max
259.861
Units
MHz
16
18
dB
13.6
MHz
14.3
0.5
1
0.5
1.5
0.5
1
0.5
0.5
1
1
dB_P-P
0.5
1
0.5
1
0.5
1.15
90
120
ns_P-P
60
120
36
43
30
40
dB
26
36
-40
+85
°C
-18
ppm/°C
L & C Match to 150 ohms
SM3838-8 3.8 x 3.8 mm Nominal Footprint
634 YYWW
Notes:
1. 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.
2. Unless noted otherwise, all frequency specifications are referenced to the nom-
inal center frequency, fc.
3. Rejection is measured as attenuation below the minimum IL point in the pass-
band. Rejection in final user application is dependent on PCB layout and exter-
nal impedance matching design. See Application Note No. 42 for details.
4. The design, manufacturing process, and specifications of this filter are subject
to change.
5. Tape and Reel Standard Per ANSI / EIA 481.
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.
9. ©Copyright 1999, RF Monolithics Inc.
Electrostatic Sensitive Device. Observe precautions for handling.
RF Monolithics, Inc. Phone: [phone]
Fax: [phone]
RFM Europe
Phone: [phone]
Fax: [phone]
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [e-mail]
http://www.rfm.com
SF2025D-090506
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