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©2009 by RF Monolithics, Inc. SF2138B - 7/9/09
1. Unless noted othe rwise, all specifica tio ns apply ov er the opera tin g tempera tu re range with f ilter so lder ed to the spec ified d emons tr ation bo ard with i mpeda nce
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. Rejectio n is measured as attenuation below the minimum IL point in the passb and. Rejection in final u ser application is dependent on PCB lay out and ex terna l
impedance matching des ign. See Application Note No. 42 for deta ils.
4. "LRIP" or " L" after the part number indicates "low rate ini tial production" and "ENG" or "E" indicate s "engineering prototypes."
5. The desi gn, manufact uring proce ss, and specifications of this filter are subject to change.
6. Tape and Reel Standard ANSI / EIA 481.
7. Eith er Port 1 or Por t 2 ma y be us ed for ei the r inp ut o r output in t he des ign. However, impedances and impeda nce mat chi ng may var y betwe en Po rt 1 and Port
2, so that the filter mus t always be inst alled in one direc tion per the ci rcuit design .
8. US and international patents may apply.
9. RFM, stylized RFM logo, and RF Monolithics, Inc. are registered trademarks of RF Monolithics, Inc.
Electrical Characteristics
Characteristic Sym Notes Min Typ Max Units
Nominal Center Frequency fC1 144.132 MHz
Passband Width at +25 °C 137.882 150.382 dB
1 dB Bandwidth BW1112.5 13.3 MHz
15 dB Bandwidth BW15 15.9 16.2 MHz
30 dB Bandwidth BW30 16.9 18.2 MHz
Passband Minimum Insertion Loss, Including Matching Network ILMIN 13.7 15.5 dB
Terminating Source Impedance ZS = 200 ohms differential
Terminating Load Impedance ZL = 1.5K ohms differential
Amplitude Ripple:
TDM1, 137.882 to 142.382 MHz 1 1.7 dBP-P
COFDM, 141.882 to 146.182 MHz 0.5 1.5
TDM2, 145.882 to 150.382 MHz 1 1.7
Attenuation Relative to Insertion Loss at Center Frequency
1, 3 dBc
122.882 to 127.882 MHz 45 50
127.882 to 132.882 MHz 43 47
154.137 to 159.137 MHz 38 42
159.137 to 162.882 MHz 43 47
162.882 to 177.882 MHz 48 53
Group Delay Ripple
nsP-P
TDM1, 137.882 to 142.382 MHz 30 100
COFDM, 141.882 to 146.182 MHz 25 100
TDM2, 145.882 to 150.382 MHz 30 100
Operating Temperature Range TA1-40 +85°C
Case Style 6SMP-03 7 x 5 mm Nominal Footprint
Lid Symbolization (YY=year, WW=week, S=shift) See note 4 RFM SF2138B YYWWS
SMP-03
• Designed for SDARS IF Receiver
• Low Insertion Loss
• 5.0 X 7.0 mm Surface-Mount Case
• Differential or Single Ended Input and Output
• Complies with Directive 2002/95/EC (RoHS)
Absolute Maximum Ratings
Rating Value Units
Maximum Incident Power in Passband +10 dBm
Maximum DC Voltage Between any Tw o Terminals 30 VDC
Storage Temperature Range in Tape an Reel -40 to +85 °C
Maximum Soldering Profile 265 °C for 10 s
144.132 MHz
SAW Filter
SF2138B
Pb
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
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©2009 by RF Monolithics, Inc. SF2138B - 7/9/09
J1
J2
200OHMS
C1
C2
L1
100NH
5.6PF
5.6PF
L3
L4
150NH
150NH C34.7PF
J3
J4
1.5Kohms
1234
5
6
789
10 SF2138B
DEMO
PCB, 400-1749-001
IND, 501-0782-101 0805 COIL CRAFT, 100NH L1
IND, 501-0782-151 0805 COIL CRAFT, 150NH L2, L3
CAP, 501-1275-056 0805, 5.6PF C1, C2
CAP, 501-1275-047 0805, 4.7PF C3
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©2009 by RF Monolithics, Inc. SF2138B - 7/9/09
SMP-03 Case
Recommended PCB Footprint
Case Dimensions
Dimension mm Inches
Min Nom Max Min Nom Max
A6.80 7.00 7.20 0.268 0.276 0.283
B4.80 5.00 5.20 0.189 0.197 0.205
C1.65 2.00 0.065 0.079
D.47 0.60 .73 0.019 0.024 0.029
E2.41 2.54 2.67 0.095 0.100 0.105
H0.87 1.0 1.13 0.034 0.039 0.044
J4.87 5.00 5.13 0.192 0.197 0.202
K2.87 3.00 3.13 0.113 0.118 0.123
P1.14 1.27 1.40 0.045 0.050 0.055
Materials
Solder Pad
Plating 0.3 to 1.0 µm Gold over 1.27 to 8.89 µm Nickel
Lid Plating 2.0 to 3.0 µm Nickel
Body Al2O3 Ceramic
Pb Free
Electrical Connections
Connection Terminals
Port 1 Input or Return 10
Return or Input 1
Port 2 Output or Return 5
Return or Output 6
Ground All others
Single-ended Operation Return is ground
Differential Operation Return is hot
A
BCHE
P
D
H
J
K
10-Terminal Ceramic Surface-Mount Case
7 x 5 mm Nominal Footprint
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©2009 by RF Monolithics, Inc. SF2138B - 7/9/09
Tape and Reel Specifica t ions
“B “ Quantity Per Reel
Inches millimeters
7 178 500
13 330 2000
USER DIRECTION OF FEED
COMPONENT ORIENTATION and DIMENSIONS
Carrier Tape Dimensions
Ao 5.5 mm
Bo 7.5 mm
Ko 2.0 mm
Pitch 8.0 mm
W16.0 mm
PIN #1
See Detail "A"
13.0
20.2
2.0
12.0
100 REF.
"B" REF.
16.0
