alpha industries, inc. [978] 241-7000 ? fax [978] 241-7906 ? email sales@alphaind.com ? www.alphaind.com 1 specifications subject to change without notice. 1/02a gaas ic 25 db voltage variable attenuator 2.7?4.0 ghz features power control for 3.5 ghz fixed wireless applications minimum 25 db attenuation positive 0.2?1.2 v control voltage qfn-12 3 x 3 mm package low cost no external components needed AV141-321 description the AV141-321 is a gaas ic phemt voltage variable attenuator that has been designed for wlan applications. operating from 2.7?4.0 ghz, the AV141-321 is ideal for low cost applications such as 3.5 ghz fixed wireless lan power control applications. parameter frequency min. typ. max. unit insertion loss (v c = 1.2 v) 2.7?4.0 ghz 0.7 1.0 db maximum attenuation (v c = 0.2 v) 2.7?4.0 ghz 25 30 db vswr ? all ports 2.7?4.0 ghz 1.5 1.8 electrical specifications at 25c parameter condition frequency min. typ. max. unit switching characteristics rise, fall (10/90% or 90/10% rf) 80 50 ns on, off (50% ctl to 90/10% rf) 150 ns video feedthru 25 mv maximum input power 2.7?4.0 ghz 13 dbm for < 1 db attenuation variation input 3rd order intercept point (iip3) 2.7?4.0 ghz 20 dbm control voltage 0.2 1.2 v operating characteristics at 25c (0, +1.2 v) characteristic value rf input power 1 w max. > 500 mhz control voltage -0.2 v, +6 v operating temperature -40c to +85c storage temperature -65c to +150c absolute maximum ratings 1. all measurements made in a 50 ? system, unless otherwise specified. 2. for worst case state. 1. all measurements made in a 50 ? system, unless otherwise specified. 2. for worst case state. preliminary
gaas ic 25 db voltage variable attenuator 2.7?4.0 ghz AV141-321 2 alpha industries, inc. [978] 241-7000 ? fax [978] 241-7906 ? email sales@alphaind.com ? www.alphaind.com specifications subject to change without notice. 1/02a typical performance data at 25c frequency (ghz) insertion loss (db) insertion loss vs. frequency -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 2.8 3.0 3.2 3.4 3.6 3.8 4.0 frequency (ghz) maximum attenuation (db) maximum attenuation vs. frequency 2.8 3.0 3.2 3.4 3.6 3.8 4.0 -40 -35 -30 -25 -20 -15 -10 -5 0 v c (v) attenuation (db) attenuation vs. control voltage -40 -35 -30 -25 -20 -15 -10 -5 0 0.2 0.4 0.6 0.8 1.0 1.2 v c (v) vswr vswr vs. control voltage 0.2 0.4 0.6 0.8 1.0 1.2 1.0 1.2 1.4 1.6 1.8 input output frequency (ghz) vswr output vswr vs. frequency 1.0 1.2 1.4 1.6 1.8 2.8 3.0 3.2 3.4 3.6 3.8 4.0 minimum attenuation maximum attenuation frequency (ghz) iip3 (dbm) input ip3 vs. frequency 2.8 3.0 3.2 3.4 3.6 3.8 4.0 18 19 20 21 22
gaas ic 25 db voltage variable attenuator 2.7?4.0 ghz AV141-321 alpha industries, inc. [978] 241-7000 ? fax [978] 241-7906 ? email sales@alphaind.com ? www.alphaind.com 3 specifications subject to change without notice. 1/02a j 1 n/c n/c n/c n/c v c n/c j 2 n/c n/c n/c 12 11 10 4 3 2 1 7 8 9 5 6 n/c pin out ground is connected to paddle on bottom. measured s-parameters include the evaluation board. vva test board sk39506 evaluation board layout typical s-parameters (control voltage 0/+1.2 v) qfn-12 0.008 (0.20 mm) seating plane 0.118 (3.00 mm) pin 1 indicator pin 1 indicator 0.118 (3.00 mm) 0.001 (0.02 mm) 0.030 (0.75 mm) 0.002 (0.05 mm) exposed pad 0.029 (0.73 mm) 0.0196 (0.50 mm) bsc 0.057 (1.45 mm) sq. + 0.004 (0.10 mm) - 0.006 (0.15 mm) 0.009 (0.23 mm) + 0.003 (0.07 mm) - 0.002 (0.05 mm) insertion loss state high attenuation state # ghz s ma r 50 # ghz s ma r 50 freq. (ghz) s 11 s 11a s 21 s 21a s 12 s 12a s 22 s 22a s 11 s 11a s 21 s 21a s 12 s 12a s 22 s 22a 2.5 0.330 66.05 0.887 -135.38 0.913 -135.67 0.312 45.02 0.160 5.13 0.074 126.57 0.074 126.20 0.161 -18.79 3.0 0.242 18.19 0.914 -175.58 0.946 -175.25 0.210 -22.04 0.129 -40.89 0.021 46.26 0.021 46.12 0.172 -71.10 3.5 0.165 -33.76 0.913 144.77 0.951 144.79 0.145 -94.37 0.152 -97.28 0.026 -107.80 0.026 -107.54 0.209 -118.44 4.0 0.070 -68.30 0.916 103.60 0.959 103.52 0.080 -152.16 0.134 -151.61 0.046 -178.59 0.047 -179.41 0.224 -161.45
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