NTE618 Varactor Silicon Tuning Diode for AM Radio Description; The NTE618 is a silicon varactor diode with a good linearity and high capacitance ratio that is capable of beinf operated from a low voltage. This device is intended for use in AM receiver electronic tuning applications. Features: D High Capacitance Ratio: CR = 15.5 (Min) D Guaranteed Figure of Merit: Q = 200 (Min) @ VR = 1V, f = 1MHz Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Reverse Voltage, VR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +100°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +100°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Breakdown Voltage Reverse Current Interterminal Capacitance Symbol V(BR)R IR Test Conditions Min Typ Max Unit IR = 10µA 16 – – V VR = 9V – – 100 nA C1.2V VR = 1.2V, f = 1MHz 420.0 – 459.1 pF C3.5V VR = 3.5V, f = 1MHz 144.2 – 192.1 pF C6.0V VR = 6.0V, f = 1MHz 45.71 – 60.91 pF C8.0V VR = 8.0V, f = 1MHz 20.30 – 23.54 pF Figure of Merit Q VR = 1V, f = 1MHz 200 – – Capacitance Ratio CR C1.2V/C8.0V, f = 1MHz 15.5 – – matching Tolerance ∆Cm – – 0.03 (Cmax – Cmin)/Cmin .157 (4.0) .118 (3.0) .071 (1.8) .590 (15.0) A K .102 (2.6) .090 (2.2) .118 (3.0)