BB439... Silicon Variable Capacitance Diode For VHF tuned circuit applications High figure of merit Pb-free (RoHS compliant) package BB439 Type Package Configuration L (nH) Marking S BB439 SOD323 single 1.8 white 2 Maximum Ratings at T = 25C, unless otherwise specified A Parameter Symbol Value Unit 28 V Diode reverse voltage V R 30 Peak reverse voltage V RM ( R 5k ) 20 mA Forward current I F C Operating temperature range T -55 ... 125 op Storage temperature T -55 ... 150 stg 2011-06-15 1BB439... Electrical Characteristics at T = 25C, unless otherwise specified A Parameter Symbol Values Unit min. typ. max. DC Characteristics Reverse current I nA R V = 28 V - - 20 R V = 28 V, T = 85 C - - 200 R A AC Characteristics pF Diode capacitance C T V = 1 V, f = 1 MHz - 43 - R V = 2 V, f = 1 MHz 31.5 34.5 37.5 R V = 3 V, f = 1 MHz 26.5 29 31.5 R V = 25 V, f = 1 MHz 4.3 5.1 6 R 6 6.9 8 Capacitance ratio C /C T2 T25 V = 2 V, V = 25 V, f = 1 MHz R R 5 5.8 6.5 Capacitance ratio C /C T3 T25 V = 3 V, V = 25 V, f = 1 MHz R R 1) - - 3 Capacitance matching C /C % T T V = 3 V, V = 25 V, f = 1 MHz R R Series resistance r - 0.35 0.5 S V = 10 V, f = 100 MHz R Figure of merit Q V = 3 V, f = 50 MHz - 280 - R V = 25 V, f = 200 MHz - 600 - R 1 For details please refer to Application Note 047. 2011-06-15 2