BF994

Silicon N Channel MOSFET Tetrode q BF 994 S For VHF applications, especially for input and mixer stages with a wide tuning range, e.g. in CATV tuners Type BF 994 S Marking MG Ordering Code (tape and reel) Q62702-F1020 Pin Configuration 1 2 3 4 S D G2 G1 Package1) SOT-143 Maximum Ratings Parameter Drain-source voltage Drain current Gate 1/gate 2 peak source current Total power dissipation, TS < 76 ˚C Storage temperature range Channel temperature< Thermal Resistance Junction - soldering point Rth Js < 370 K/W Symbol VDS ID ± Values 20 30 10 200 150 Unit V mA mW IG1/2SM Ptot Tstg Tch – 55 … + 150 ˚C 1) For detailed information see chapter Package Outlines. BF 994 S Electrical Characteristics at TA = 25 ˚C, unless otherwise specified. Parameter Symbol min. DC Characteristics Drain-source breakdown voltage ID = 10 µA, – VG1S = – VG2S = 4 V Gate 1 source breakdown voltage ± IG1S = 10 mA, VG2S = VDS = 0 Gate 2 source breakdown voltage ± IG2S = 10 mA, VG1S = VDS = 0 Gate 1 source leakage current ± VG1S = 5 V, VG2S = VDS = 0 Gate 2 source leakage current ± VG2S = 5 V, VG1S = VDS = 0 Drain current VDS = 15 V, VG1S = 0, VG2S = 4 V Gate 1 source pinch-off voltage VDS = 15 V, VG2S = 4 V, ID = 20 µA Gate 2 source pinch-off voltage VDS = 15 V, VG1S = 0, ID = 20 µA V(BR) DS ± ± ± ± Values typ. max. Unit 20 8.5 8.5 – – 2 – – – – – – – – – – – 14 14 50 50 20 2.5 2.0 V V(BR) G1SS V(BR) G2SS IG1SS IG2SS nA IDSS – VG1S (p) – VG2S (p) mA V BF 994 S Electrical Characteristics at TA = 25 ˚C, unless otherwise specified. Parameter Symbol min. AC Characteristics Forward transconductance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 kHz Gate 1 input capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Gate 2 input capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Feedback capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Output capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Power gain VDS = 15 V, ID = 10 mA f = 200 MHz, GG = 2 mS, GL = 0.5 mS (test circuit) Noise figure VDS = 15 V, ID = 10 mA f = 200 MHz, GG = 2 mS, GL = 0.5 mS (test circuit) Gain control range VDS = 15 V, VG2S = 4 … – 2 V, f = 200 MHz (test circuit) gfs Cg1ss Cg2ss Cdg1 Cdss Gps 15 – – – – – 18 2.5 1.2 25 1 25 – – – – – – fF pF dB mS pF Values typ. max. Unit F – 1 – ∆ Gps 50 – – BF 994 S Total power dissipation Ptot = f (TA) Output characteristics ID = f (VDS) VG2S = 4 V Gate 1 forward transconductance gfs1 = f (VG1S) VDS = 15 V, IDSS = 10 mA, f = 1 kHz Gate 1 forward transconductance gfs1 = f (VG2S) VDS = 15 V, IDSS = 10 mA, f = 1 kHz BF 994 S Drain current ID = f (VG1S) VDS = 15 V Gate 1 input capacitance Cg1ss = f (VG1S) VG2S = 4 V, VDS = 15 V IDSS = 10 mA, f = 1 MHz Gate 2 input capacitance C g2ss = f (VG2S) VG1S = 0 V, VDS = 15 V IDSS = 10 mA, f = 1 MHz Output capacitance Cdss = f (VDS) VG1S = 0 V, VG2S = 4 V IDSS = 10 mA, f = 1 MHz BF 994 S Gate 1 input admittance y11s VDS = 15 V, VG2S = 4 V (common source) Gate 1 forward transfer admittance y21s VDS = 15 V, VG2S = 4 V (common source) Output admittance y22s VDS = 15 V, VG2S = 4 V (common source) BF 994 S Power gain Gps = f (VG2S) VDS = 15 V, VG1S = 0 V, IDSS = 10 mA f = 200 MHz (see test circuit) Noise figure F = f (VG2S) VDS = 15 V, VG1S = 0 V, IDSS = 10 mA f = 200 MHz (see test circuit) Test circuit for power gain and noise figure f = 200 MHz, GG = 2 mS, GL = 0.5 mS