BB 304A Silicon Variable Capacitance Diode Preliminary Data ● ● ● ● ● For FM tuners Monolithic chip with common cathode for perfect tracking of both diodes Uniform "square law" characteristics Ideal Hifi tuning device when used in Low-distortion back-to back configuration Color-coded capacitance subgroups available (see characteristics) Type Ordering Code (tape and reel) Pin Configuration 1 2 3 Marking Package BB 304A Q62702-B118 A1 color coded capacitance groups TO-92 C1/C2 A2 Maximum Ratings Parameter Symbol Values Unit Reverse voltage VR 18 V Peak reverse voltage (R ≥ 10 Ω) VRM 20 V Forward current TA ≤ 60 °C IF 50 mA Storage temperature range Tstg – 55 … + 150 °C Rth JA ≤ K/W Thermal Resistance Junction-ambient Semiconductor Group 1 10.94 BB 304A Electrical Characteristics at TA = 25 °C, unless otherwise specified. Parameter Symbol Value min. typ. Unit max. DC Characteristics Reverse current VR = 16 V VR = 16 V, TA = 60 °C IR Diode capacitance VR = 2 V, f = 1 MHz CT Capacitance ratio VR = 2 V … 8V, f = 1 MHz CT2/CT8 Series resistance VR = 38 V, f = 100 MHz rS Q factor CT = 38 pF, f = 100 MHz Q Diode capacitance VR = 2 V, f = 1 MHz Subgroup: red yellow white green blue CT nA – – 20 200 pF 42 – 47.5 – 1.65 – – 1.75 Ω – 0.25 0.4 – 100 170 – pF 42 43 44 45 46 Package Outline TO-92 Semiconductor Group – – 2 – – – – – 43.5 44.5 45.5 46.5 47.5 BB 304A Diode capacitance CT = f (VR) per diode f = 1 MHz Capacitance ratio CT/CTref = f (VR) per diode; Vref = 1 V, 2 V, f = 1 MHz Temperature coefficient TCC = f (VR) per diode, f = 1 MHz Semiconductor Group 3