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| 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 D1 D2 1 2 Type BB914 Package SOT23 Configuration common cathode LS(nH) Marking 1.8 SM Maximum Ratings at TA = 25C, unless otherwise specified Parameter Symbol Value Unit Diode reverse voltage Peak reverse voltage Forward current Operating temperature range Storage temperature (R 5k ) VR VRM IF Top Tstg 18 20 50 -55 ... 125 -55 ... 150 V mA C 1 Dec-04-2002 BB914... Electrical Characteristics at TA = 25C, unless otherwise specified Symbol Values Parameter min. DC Characteristics Reverse current VR = 16 V VR = 16 V, TA = 85 C AC Characteristics Diode capacitance VR = 2 V, f = 1 MHz VR = 8 V, f = 1 MHz CT Unit max. nA 20 200 typ. - IR - pF 42.5 17.6 43.75 18.7 2.34 0.28 45 19.75 2.42 1.5 % Capacitance ratio VR = 2 V, VR = 8 V, f = 1 MHz VR = 2 V, VR = 8 V, f = 1 MHz CT2 /CT8 CT/CT 2.28 - VR = 2 V, f = 100 MHz 1For details please refer to Application Note 047. 2 Dec-04-2002 Series resistance Capacitance matching1) rS BB914... Diode capacitance CT = f = 1MHz 100 pF f = 1MHz 5 - 70 CTref / C T 80 4 3.5 3 2.5 2 1.5 1 0.5 1V CT 60 50 40 30 20 10 0 0 V 1 2 3 4 5 6 7 8 10 0 0 1 2 3 4 5 6 VR 3 Dec-04-2002 7 (VR ) Capacitance ratio CTref /CT = (VR ) 2V 3V 8 V 10 VR |
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