Databook.fxp 1/13/99 2:09 PM Page B-3 B-3 01/99 2N3821, 2N3822 N-Channel Silicon Junction Field-Effect Transistor Absolute maximum ratings at TA = 25C VHF Amplifiers Small Signal Amplifiers Reverse Gate Source & Reverse Gate Drain Voltage Continuous Forward Gate Current Continuous Device Power Dissipation Power Derating At 25C free air temperature: 2N3821 Static Electrical Characteristics Min Gate Source Breakdown Voltage V(BR)GSS Gate Reverse Current IGSS - 50 - 0.5 Gate Source Voltage Max VGS(OFF) Drain Saturation Current (Pulsed) IDSS Drain Cutoff Current ID(OFF) Min Max - 50 Process NJ32 Unit Test Conditions V IG = - 1 A, VDS = OV - 0.1 - 0.1 nA VGS = - 30V, VDS = OV - 0.1 - 0.1 A VGS = - 30V, VDS = OV V VDS = 15V, ID = 50 A V VDS = 15V, ID = 200 A V VDS = 15V, ID = 400 A -6 V VDS = 15V, ID = 0.5 nA 10 mA VDS = 15V, VGS = OV nA VDS = 15V, VGS = - 8V A VDS = 15V, VGS = - 8V TA = 150C VGS = OV, ID = O V f = 1 kHz -2 VGS Gate Source Cutoff Voltage 2N3822 - 50 V 10 mA 300 mW 2mW/C -1 -4 0.5 2.5 2 -4 TA = 150C Dynamic Electrical Characteristics Drain Source ON Resistance rds(on) Common Source Forward Transconductance gfs 1500 4500 3000 6500 S VDS = 15V, VGS = OV f = 1 kHz Common Source Forward Transmittance | Yfs | 1500 S VDS = 15V, VGS = OV f = 100 MHz Common Source Output Conductance gos 10 20 S VDS = 15V, VGS = OV f = 1 kHz Common Source Input Capacitance Ciss 6 6 pF VDS = 15V, VGS = OV f = 1 MHz Common Source Reverse Transfer Capacitance Crss 2 2 pF VDS = 15V, VGS = OV f = 1 MHz Equivalent Short Circuit Input Noise Voltage e N 200 VDS = 15V, VGS = OV f = 10 Hz Noise Figure NF 5 VDS = 15V, VGS = OV RG = 1 M f = 10 Hz 3000 TO72 Package Pin Configuration Dimensions in Inches (mm) 1 Source, 2 Drain, 3 Gate, 4 Case www.interfet.com 200 nV/Hz 5 dB 1000 N. Shiloh Road, Garland, TX 75042 (972) 487-1287 FAX (972) 276-3375