SAW Device SAW Filter for GSM Base Station For Industrial Use n Features l A low-loss filter. l With a low-band ripple. l Excellent group delay characteristics. l Excellent guaranteed attenuation. Pb Free n Specifications Model WF972A0125CG Item min. typ. Nominal frequency : f0 (MHz) – 125 – Minimal insertion loss (dB) – 5.6 7 1-dB passband width (MHz) In-band deviation (dB p-p)(f0±0.2MHz) Absolute group delay time (ns)(at f0) max. 0.4 0.7 – – 0.5 1.0 700 1075 1700 Group delay deviation (ns p-p)(f0±0.2MHz) – 85.0 120 Out-of-band attenuation (from the minimal insertion loss) – – – f0±0.4MHz to f0±0.6MHz 0 2 – f0±0.6MHz to f0±1.2MHz 8 11 – f0±1.2MHz to f0±1.8MHz 20 31 – f0±1.8MHz to f0±3.4MHz 25 44 – f0±3.4MHz to f0±6.5MHz 34 47 – Guaranteed attenuation (dB) f0±6.5MHz to f0±9.5MHz 40 41 – *1 f0±9.5MHz to f0±17MHz 43 51 – f0–115MHz to f0–17MHz 55 65 – *1 f0+17MHz to f0+325MHz 55 56 – –10 – 85 Operating temperature range (°C) Terminating impedance (Ω) 50 with matching n Dimensions n Characteristics mm Reference land pattern 1.905×4=7.62 13.3 8 7 6 1 2 3 4 5 6 7 0.80 8 9 1.905×4=7.62 characteristics] 10 2.5 7.5 9 5 4 3 2 1.5 6.5 10 CH1 A/R LOG MAG [In-band REF –5.670 dB 0.500 dB/ CH2 A/R DELAY REF 1.044 μsec 0.050 μsec/ 1 1.65 max 10–1.0 PAD NO. CONNECTION Others GND 10 INPUT 5 OUTPUT CH1 CENTER(MHz) 125.0000 CH2 CENTER(MHz) 125.0000 SPAN(MHz)1.000 SPAN(MHz)1.000 CH1 A/R LOG MAG [Out-of-band REF –5.670dB 10.000 dB/ n Matching Circuit characteristics] Ls3 Ls2 10 5 SAW 50Ω Lp1 Lp4 50Ω Others CH1 CENTER(MHz) 125.0000 SPAN(MHz) 12.000 sa18_071102_WF972A0125CG_e1