J309 INTERFET | Alldatasheet
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J308, J309 N-Channel Silicon Junction Field-Effect Transistor Absolute maximum ratings at TA = 25¡C Reverse Gate Source & Reverse Gate Drain Voltage – 25 V Continuous Forward Gate Current 10 mA Continuous Device Power Dissipation 360 mW Power Derating 3.27 mW/°C TOÐ226AA Package Dimensions in Inches (mm) Pin Configuration
1 Drain, 2 Source, 3 Gate
SMPJ308, SMPJ309 At 25°C free air temperature: J308 J309 Process NJ72 Static Electrical Characteristics Min Typ Max Min Typ Max Unit Test Conditions Gate Source Breakdown Voltage V (BR)GSS – 25 – 25 V I G = – 1µA, VDS = ØV Gate Reverse Current I GSS – 1 – 1 nA V GS = – 15V, VDS = ØV – 1 – 1 µA V GS = – 15V, VDS = ØV T A = +125°C Gate Source Cutoff Voltage V GS(OFF) – 1 – 6.5 – 1 – 4 V V DS = 10V, ID = 1 nA Gate Source Forward Voltage V GS(F) 11 V V DS = ØV, I G = 1 mA Drain Saturation Current (Pulsed) I DSS 12 60 12 30 mA V DS = 10V, VGS = ØV Dynamic Electrical Characteristics Common Source Forward Transconductance gfs 8000 17000 10000 17000 µS V DS = 10V, ID = 10 mA f = 1 kHz Common Source Output Conductance g os 250 250 µS V DS = 10V, ID = 10 mA f = 1 kHz Common Gate Forward Transconductance gfg 13000 13000 µS V DS = 10V, ID = 10 mA f = 1 kHz Common Gate Output Transconductance gog 150 100 µS V DS = 10V, ID = 10 mA f = 1 kHz Gate Drain Capacitance C dg 1.8 2.5 1.8 2.5 pF V DS = ØV, V GS = – 10V f = 1 MHz Gate Source Capacitance C gs 45 45 p FV DS = ØV, V GS = – 10V f = 1 MHz Equivalent Short Circuit ¯eN 10 10 nV/√Hz VDS = 10V, ID = 10 mA f = 100 kHzInput Noise Voltage Common Source Forward Re(Yfs) 12 12 µS V DS = 10V, ID = 10 mA f = 105 MHzTransconductance Common Gate Input Conductance Re (Yig) 14 14 µS V DS = 10V, ID = 10 mA f = 105 MHz Common Source Input Conductance Re (Yis) 0.4 0.4 µS V DS = 10V, ID = 10 mA f = 105 MHz Common Source Output Conductance Re (Gos) 0.15 0.15 µS V DS = 10V, ID = 10 mA f = 105 MHz Common Gate Power Gain Gpg 16 16 dB V DS = 10V, ID = 10 mA f = 105 MHz at Noise Match 11 11 dB V DS = 10V, ID = 10 mA f = 450 MHz Noise Figure NF 1.5 1.5 dB V DS = 15V, ID = 10 mA f = 105 MHz 2.7 2.7 dB V DS = 15V, ID = 10 mA f = 450 MHz ¥ Mixers ¥ Oscillators ¥ VHF/UHF Amplifiers 1000 N. Shiloh Road, Garland, TX 75042 (972) 487-1287 FAX (972) 276-3375www.interfet.com Databook.fxp 1/13/99 2:09 PM Page B-61