Datasheet

2007-04-20
3
BF998...
Electrical Characteristics at T
A
= 25°C, unless otherwise specified
Parameter
Symbol Values Unit
min. typ. max.
AC Characteristics (verified by random sampling)
Forward transconductance
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V
g
fs
20 24 - -
Gate1 input capacitance
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 10 MHz
C
g1ss
- 2.1 2.5 pF
Gate 2 input capacitance
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 10 MHz
C
g2ss
- 1.2 - pF
Feedback capacitance
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 10 MHz
C
dg1
- 25 - fF
Output capacitance
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 10 MHz
C
dss
- 1.1 - pF
Power gain
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 45 MHz
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 800 MHz
G
p
-
-
28
20
-
-
dB
Noise figure
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 45 MHz
V
DS
= 8 V, I
D
= 10 mA, V
G2S
= 4 V,
f = 800 MHz
F
-
-
2.8
1.8
-
-
dB
Gain control range
V
DS
= 8 V, V
G2S
= 4 ...-2 V, f = 800 MHz
∆G
p
40 50 -