BB914... Silicon Variable Capacitance Diode For FM radio tuner with extended frequency band High tuning ratio at low supply voltage (car radio) Monolitic chip (common cathode) for perfect dual diode tracking Good linearity for C- V curve High figure of merit BB914 3 D 2 D 1 1 2 Type BB914 Package SOT23 Configuration common cathode LS(nH) Marking 1.8 SM Maximum Ratings at TA = 25°C, unless otherwise specified Parameter Symbol Value Unit Diode reverse voltage VR 18 Peak reverse voltage VRM 20 Forward current IF 50 mA Operating temperature range Top -55 ... 125 °C Storage temperature Tstg -55 ... 150 V ( R 5k ) 1 Dec-04-2002 BB914... Electrical Characteristics at TA = 25°C, unless otherwise specified Symbol Values Parameter min. typ. - - - - Unit max. DC Characteristics Reverse current IR VR = 16 V VR = 16 V, TA = 85 °C nA 20 200 AC Characteristics Diode capacitance pF CT VR = 2 V, f = 1 MHz 42.5 43.75 45 VR = 8 V, f = 1 MHz 17.6 18.7 19.75 CT2 /CT8 2.28 2.34 2.42 CT/CT - - 1.5 % rS - 0.28 - Capacitance ratio VR = 2 V, VR = 8 V, f = 1 MHz Capacitance matching1) VR = 2 V, VR = 8 V, f = 1 MHz Series resistance VR = 2 V, f = 100 MHz 1For details please refer to Application Note 047. 2 Dec-04-2002 BB914... Diode capacitance CT = (VR ) Capacitance ratio CTref /CT = (VR ) f = 1MHz f = 1MHz 100 5 pF - CTref / C T 80 CT 70 60 4 3.5 50 2.5 40 2 30 1.5 20 1 10 0.5 0 0 1 2 3 4 5 6 7 8 V 0 0 10 1V 3 2V 3V 1 2 3 4 5 6 7 8 V 10 VR VR 3 Dec-04-2002