238MHz SAW Filter 6MHz Bandwidth China Electronics Technology Group Corporation No.26 Research Institute SIPAT Co., Ltd. Part Number: www.sipatsaw.com LBS23801 Specifications Parameter Unit Minimum Typical Maximum Center Frequency MHz 237.85 238 238.15 Insertion Loss dB - 24.8 27 3 dB Bandwidth MHz 6 6.1 - 45 dB Bandwidth MHz - 8.17 8.2 Passband Variation dB - 0.8 0.9 Absolute Delay usec - 2.109 - Ultimate Rejection dB 45 47 - Material Temperature coefficient KHz/°C 0.238 Ambient Temperature °C 25 DIP2712 (27.0x12.8x4.7mm3) Package Size Notes: 1. All specifications are based on the test circuit shown 2. In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over temperature 3. Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances 4. This is the optimum impedance in order to achieve the performance show Matching Configuration L1 L2 L1=L2=39nH C1=12pF C1 C2=33pF Source/Load Impedance=50 ohm C2 Notes - Component values may change depending on board layout. SIPAT Co., Ltd. ( CETC No. 26 Research Institute ) Nanping Huayuan Road No. 14 Chongqing, China, 400060 Phone: +86-23-62920684 Part Number LBS23801 Rev. Date 2005-9-16 Rev. 1.0 Fax: +86-23-62805284 Page 1/3 www.sipatsaw.com / [email protected] 238MHz SAW Filter 6MHz Bandwidth China Electronics Technology Group Corporation No.26 Research Institute SIPAT Co., Ltd. Part Number: www.sipatsaw.com LBS23801 Package Dimension 27.00±0.5 12.80±0.5 4.7 4.5 0.45±0.05 2.54±0.2 5 6 1 7.62±0.2 4 3 2 17.70±0.2 2.54±0.2 Input:1 Output:5 SIPAT Co., Ltd. ( CETC No. 26 Research Institute ) Nanping Huayuan Road No. 14 Chongqing, China, 400060 Phone: +86-23-62920684 Part Number LBS23801 Rev. Date 2005-9-16 Rev. 1.0 Fax: +86-23-62805284 Page 2/3 www.sipatsaw.com / [email protected] 238MHz SAW Filter 6MHz Bandwidth China Electronics Technology Group Corporation No.26 Research Institute SIPAT Co., Ltd. Part Number: www.sipatsaw.com LBS23801 Typical Performance Frequency Respond Passband Respond -24.7858 -20 -21 -34.7858 -22 -44.7858 -23 -54.7858 -24 -64.7858 -25 -26 -74.7858 -27 -84.7858 -28 -94.7858 -29 -104.7858 226 229 232 235 238 241 244 247 250 233 234 235 236 237 238 239 240 241 242 Group Delay Variation(f0±2.7MHz) Phase Linearity(f0±2.7MHz) Smith Chart S11 Smith Chart S22 SIPAT Co., Ltd. ( CETC No. 26 Research Institute ) Nanping Huayuan Road No. 14 Chongqing, China, 400060 Phone: +86-23-62920684 Part Number LBS23801 Rev. Date 2005-9-16 Rev. 1.0 Fax: +86-23-62805284 Page 243 3/3 www.sipatsaw.com / [email protected]