281 MHz SAW Filter Part Number 205708B 1. Features Typical 1dB bandwidth of 6.8 MHz Low-Loss Filter Single Ended Operation Surface Mounted Package (SMD) 2. Electrical Specifications Source and Load Impedance = 50Ω Room Temperature : +25℃ Minimum Typical Maximum MHz 280.8 281.0 281.2 dB - 11.5 13.5 1dB Bandwidth MHz - 6.8 - 3dB Bandwidth MHz 7.7 8.05 - 40dB Bandwidth MHz - 13.0 13.5 dB - 0.55 1.0 Group Delay Variation (fo ± 3.0 MHz) nsec - 35 100 Absolute Delay usec - 0.62 - dB 40 43 - ppm/℃ - -18 - Center Frequency (fo) Insertion Loss Amplitude Ripple (fo ± 3.0 MHz) Ultimate Rejection Temperature Coefficient of Frequency S1365 Package Dimension 13.30±0.2 12 8 7.62±0.1 7 ITF 13A001 205708B . 281-6.8M 1 2 3 4 7 9 8 11 5 C2 Out put 50Ω 11 L1 1.50±0.1 5 5 C1 I nput 50Ω 10 6 6 2.54±0.1 11 9 1.61±0.2 6.50±0.2 10 Matching Schematic L2 12 4 3 2 2.54±0.1 1 0.80±0.1 L1 = 12nH, C1 = 130pF, C2 = 91pF, L2 = 12nH Pin Configuration Dimensions shown are nominal in millimeters Body : Al2O3 Lid : Kovar, Ni Plated Termination : Au plating 0.3 ~ 1.0um, over a 1.27 ~ 8.89um Ni Plating I T F Co., Ltd. 102-901, Bucheon Technopark 364, Samjeong-Dong, Ojeong-Gu, Bucheon-City, Gyounggi-Do, Korea 421-809 Tel: 82-32-621-1213 Fax: 82-32-621-1218 Input 11 Ground 6, 12 Output 5 Others Ground http://www.itf.co.kr [email protected] 2013. 09. 25 Rev 1.0 281 MHz SAW Filter Part Number 205708B 3. Typical Performance ( at +25℃ ) 1dB Bandwidth & Ripple CH2 CH4 S21 S21 LOG LOG 1 dB/ 1 dB/ 40dB Bandwidth 25 Sep 2013 17:26:29 1: 0. 0000 dB 0. 000 000 MHz 3: . 07740 dB 6. 000 000 MHz REF -11.2 dB REF -11.2 dB BW: CH1 S21 LOG 10 dB/ CH2 Markers REF=1 6. 802651 MHz cent : 281 . 005836 MHz 25 Sep 2013 17:26:08 1: 0. 0000 dB 0. 000 000 MHz REF -11.2 dB BW: 1 Cor Q: 41 . 308 CH1 Markers REF=1 12 . 903617 MHz cent : 281 . 085948 2 MHz Q: 21 . 784 1_loss : -11 . 414 dB 1 1_loss : -11 . 413 dB 2 3 4 3 2 CH4 Markers REF=2 mean : -11 . 418 dB Cor s. dev : . 08700 dB p-p : . 53680 dB 3 4 Cor CENTER 281 . 000 000 MHz SPAN 12 . 000 000 MHz 2 4 CENTER 281 . 000 000 MHz 3dB Bandwidth & Group Delay CH2 CH4 S21 S21 LOG DEL 1 dB/ 100 ns/ BW: 35 . 000 000 MHz Smith Chart(S11 & S22) 25 Sep 2013 17:26:18 1: 0. 0000 dB 0. 000 000 MHz 3: -21 . 744 ns 6. 000 000 MHz REF -11.2 dB REF 594 ns SPAN CH1 S11 CH3 S22 1 U FS 1 U FS 1: 58. 648 2: 52. 555 46. 760 -10 . 510 25 Sep 2013 17:26:44 26. 484 nH 281. 000 000 MHz 53. 892 pF 281. 000 000 MHz CH2 Markers REF=1 8. 056556 MHz cent : 280 . 972866 MHz Cor Q: 34 . 875 1_loss : -11 . 423 dB 1 1 Cor 2 3 2 2 CH4 Markers REF=2 4 mean : 617 . 09 ns 3 Cor Smo s. dev : 6. 2275 4ns p-p : 34 . 491 ns Cor CENTER 281 . 000 000 MHz SPAN 12 . 000 000 MHz 2 CENTER 281. 000 000 MHz Wide band Properties CH1 S21 LOG 10 dB/ REF -11.2 dB SWR(S11 & S22) 25 Sep 2013 17:27:39 1: 0. 0000 dB 0. 000 000 MHz 1 SPAN 35. 000 000 MHz CH1 Markers REF=1 2: -43 . 599 dB 281 . 000 MHz CH1 CH3 S11 S22 SWR SWR 2 / 2 / 25 Sep 2013 17:27:06 1: 2. 3405 281 . 000 000 MHz 2: 1. 2344 281 . 000 000 MHz REF 0 REF 0 Cor 3: -49 . 210 dB 562 . 000 MHz Cor 1 2 3 2 START . 010 000 MHz STOP 900 . 000 000 MHz I T F Co., Ltd. 102-901, Bucheon Technopark 364, Samjeong-Dong, Ojeong-Gu, Bucheon-City, Gyounggi-Do, Korea 421-809 Tel: 82-32-621-1213 Fax: 82-32-621-1218 CENTER 281 . 000 000 MHz http://www.itf.co.kr SPAN [email protected] 35 . 000 000 MHz 2013. 09. 25 Rev 1.0