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 Silicon N Channel MOSFET Tetrode
q q
BF 997
Integrated suppression network against spurious VHF oscillations For VHF applications, especially in TV tuners with extended VHF band, e. g. in CATV tuners
Type BF 997
Marking MK
Ordering Code (tape and reel) Q62702-F1055
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..
Semiconductor Group
1
07.94
BF 997
Electrical Characteristics at TA = 25 C, unless otherwise specified. Parameter Symbol min. DC Characteristics Drain-source breakdown voltage ID = 10 A, - 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 A Gate 2 source pinch-off voltage VDS = 15 V, VG1S = 0, ID = 20 A 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
Semiconductor Group
2
BF 997
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
-
-
Semiconductor Group
3
BF 997
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
Semiconductor Group
4
BF 997
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 Cg2ss = 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
Semiconductor Group
5
BF 997
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)
Semiconductor Group
6
BF 997
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
Semiconductor Group
7


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