SAW Device SAW Filter for Radio Communication For Industrial Use n Features l A low-loss filter. l Compact. l Excellent guaranteed attenuation. Pb Free n Specifications Model WF748D0140CD Item min. typ. Nominal frequency : f0 (MHz) – 140 – Insertion loss at Fc – – 11 1-dB passband width (MHz) 21 – – 3-dB passband width (MHz) Passband width (rel to Fc) max. 23.9 – – 35-dB passband width (In Band)(MHz) – – 34 1.0 Ripple (@ Fc ±10MHz)(dB) – – Phase linearity (@ Fc ±10MHz)(deg) – – 14 Group delay time ripple (@ Fc ±10MHz)(ns) – – 100 – Absolute delay time @ Fc (is) – 0.76 Out Band Guaranteed attenuation (dB) @ Fc–20MHz 40 – – (rel to Fc) @ Fc+20MHz 33 – – – 27 Operating temperature range (°C) 23 Terminating impedance (Ω) 50 (with matching) n Dimensions n Characteristics mm 5.0 PAD NO. [In-band characteristics] CH1 A/R LOG MAG REF –9.290 dB 1.000 dB/ CONNECTION Others GND 10 INPUT 5 OUTPUT 7.0 1.6 Reference land pattern 0.8 2.5 2×1.27 9–1.0 1.27 1.27 2 1.5 1.9 2.54 5 7 CENTER(MHz) 140.0000 SPAN(MHz) 50.000 [Out-of-band characteristics] 1.27 CH1 A/R LOG MAG REF –9.290 dB 10.000 dB/ 7.0 8 CH1 1.4 4 9 2.54 5.0 3 10 10–0.6 1.5 1 6 n Matching Circuit IN C1 10 C2 5 OUT SAW 50Ω L1 L2 50Ω CH1 CENTER(MHz) 140.0000 SPAN(MHz) 100.000 sa16_071102_WF748D0140CD_e1