BB814... Silicon Variable Capacitance Diodes For FM radio tuners with extended frequency band High tuning ratio at low supply voltage (car radio) Monolithic chip (common cathode) for perfect dual diode tracking Coded capacitance groups and group matching available BB814 3 D 2 D 1 1 2 Type BB814 Package SOT23 Configuration common cathode LS(nH) Marking 1.8 SH1/2* *For differences see next page Capacitance groups 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 1 V Dec-04-2002 BB814... Electrical Characteristics at TA = 25°C, unless otherwise specified Symbol Values Parameter min. typ. Unit max. DC Characteristics Reverse current IR nA VR = 16 V - - 20 VR = 16 V, TA = 60 °C - - 200 AC Characteristics Diode capacitance1) pF CT VR = 2 V, f = 1 MHz 43 44.75 46.5 VR = 8 V, f = 1 MHz 19.1 20.8 22.7 CT2 /CT8 2.05 2.15 2.25 CT/CT - - 3 % rS - 0.18 - Q - 200 - Capacitance ratio VR = 2 V, VR = 8 V, f = 1 MHz Capacitance matching2) VR = 2 V, VR = 8 V, f = 1 MHz Series resistance VR = 2 V, f = 100 MHz Q factor f = 100 MHz, VR = 2 V 1Capacitance CT/groups groups at 2V and 8V, coded 1; 2 1 2 C2V min 43pF 44.5pF C2V max 45pF 46.5pF C8V min 19.1pF 19.75pF C8V max 21.95pF 22.7pF 2For details please refer to Application Note 047. 2 Dec-04-2002 BB814... Diode capacitance CT = (VR) Capacitance ratio CTref /CT = (VR ) f = 1MHz f = 1MHz CT 80 pF 70 BB 814 EHD07054 C Tref 6 BB 814 EHD07057 CT 5 Vref = 1 V 60 4 2V 50 40 3V 3 30 2 20 1 10 0 10 -1 10 0 10 1 V VR 0 10 2 0 5 10 15 V 20 VR 3 Dec-04-2002