BF 994 S
Electrical Characteristics
at TA = 25 ˚C, unless otherwise specified.
Parameter
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)
Symbol
Values
Unit
min. typ. max.
gfs
15
18
–
mS
Cg1ss
–
2.5 –
pF
Cg2ss
–
1.2 –
Cdg1
–
25 –
fF
Cdss
–
1
–
pF
Gps
–
25 –
dB
F
–
1
–
∆ Gps
50
–
–