SF2178A • Precision IF SAW Filter • Hermetic 13.3 x 6.5 mm Surface-mount Case • Complies with Directive 2002/95/EC (RoHS) Absolute Maximum Ratings Rating 168 MHz SAW Filter Pb Value Units +10 dBm 30 VDC -40 to +85 °C Maximum Incident Power in Passband Maximum DC Voltage Between any 2 Terminals Storage Temperature Range Suitable for Lead-free Soldering - Maximum Soldering Profile 260°C for 30 s SM13365-12 Electrical Characteristics Characteristic Sym Notes fC 1 168 MHz 1 dB Bandwidth BW1 1 20.9 MHz 3 dB Bandwidth BW3 1 22.4 Upper -35 dB Band Edge 1 181.7 Lower -35 dB Band Edge 1 Center Frequency Insertion Loss IL Passband Ripple (p-p) 158 to 178 MHz Absolute Group Delay 168 MHz Group delay ripple (p-p) Min 20.0 154 1 1, 2, 3 158 to 178 MHz Operating Temperature 1 Lid Symbolization (YY = year, WW = week) MHz MHz 13.5 dB 1.0 dB 0.85 1 µs 54 160 ns +85 °C 50 159.5 to 168.5 MHz 2.2 50 -72 Impedance Matching to 50 Ω Unbalanced Case Style MHz 182.0 12.2 2.3 Frequency Temperature Coefficient Units 0.76 159.5 to 168.5 MHz Load Impedance VSWR to Load (Matching Network) Max 155.1 -40 Source Impedance VSWR to Source (Matching Network) Typ ohm ohm ppm/°C External L-C SM13365-12 13.3 x 6.5 mm Nominal Footprint RFM SF2178A 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: [email protected] ©2008 by RF Monolithics, Inc. Page 1 of 5 SF2178A - 7/7/09 Wide-band and Narrow-band Filter Plots www.RFM.com E-mail: [email protected] ©2008 by RF Monolithics, Inc. Page 2 of 5 SF2178A - 7/7/09 Tuning Component Values M a tc h in g C ir c u it 5 0 o h m s I J K 8 2 p F H G F S F 2 1 7 8 A 3 6 n H L A B C D 5 0 o h m s E 8 2 p F 3 9 n H PCB Pad Layout www.RFM.com E-mail: [email protected] ©2008 by RF Monolithics, Inc. Page 3 of 5 SF2178A - 7/7/09 SM13365-12 Case 12-Terminal Ceramic Surface-Mount Case 13.3 x 6.5 mm Nominal Footprint Case Dimensions mm Dimension A B C D E H P Inches Min Nom Max Min Nom Max 13.08 6.27 13.31 6.50 1.91 1.50 0.79 1.0 2.54 13.60 6.80 2.00 0.515 0.247 0.524 0.256 0.075 0.059 0.031 0.039 0.100 0.535 0.268 0.079 Electrical Connections Connection Terminals Input K Output E Case Ground All others 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 www.RFM.com E-mail: [email protected] ©2008 by RF Monolithics, Inc. Page 4 of 5 SF2178A - 7/7/09 Tape and Reel Details www.RFM.com E-mail: [email protected] ©2008 by RF Monolithics, Inc. Page 5 of 5 SF2178A - 7/7/09