Semiconductor Group
1
Dec-16-1996
BFS 481
NPN Silicon RF Transistor
For low-noise, high-gain broadband amplifier
at collector currents from 0.5 to 12 mA
f
T
= 8 GHz
F = 1.4 dB at 900 MHz
Two (galvanic) internal isolated
Transistors in one package
ESD: Electrostatic discharge sensitive device, observe handling precaution!
Type
Marking Ordering Code
Pin Configuration
Package
BFS 481
RFs
Q62702-F1572
1/4 = B
2/5 = E
3/6 = C
SOT-363
data below is of a single transistor
Maximum Ratings
Parameter
Symbol
Values
Unit
Collector-emitter voltage
V
CEO
12
V
Collector-emitter voltage
V
CES
20
Collector-base voltage
V
CBO
20
Emitter-base voltage
V
EBO
2
Collector current
I
C
20
mA
Base current
I
B
2
Total power dissipation
T
S
83 C
P
tot
175
mW
Junction temperature
T
j
150
C
Ambient temperature
T
A
- 65 ... + 150
Storage temperature
T
stg
- 65 ... + 150
Thermal Resistance
Junction - soldering point
1)
R
thJS
380
K/W
1)
T
S
is measured on the collector lead at the soldering point to the pcb.
Semiconductor Group
2
Dec-16-1996
BFS 481
Electrical Characteristics at
T
A
= 25C, unless otherwise specified.
Parameter
Symbol
Values
Unit
min.
typ.
max.
DC Characteristics
Collector-emitter breakdown voltage
I
C
= 1 mA,
I
B
= 0
V
(BR)CEO
12
-
-
V
Collector-emitter cutoff current
V
CE
= 20 V,
V
BE
= 0
I
CES
-
-
100
A
Collector-base cutoff current
V
CB
= 10 V,
I
E
= 0
I
CBO
-
-
100
nA
Emitter-base cutoff current
V
EB
= 1 V,
I
C
= 0
I
EBO
-
-
1
A
DC current gain
I
C
= 5 mA,
V
CE
= 8 V
h
FE
50
100
200
-
Semiconductor Group
3
Dec-16-1996
BFS 481
Electrical Characteristics at
T
A
= 25C, unless otherwise specified.
Parameter
Symbol
Values
Unit
min.
typ.
max.
AC Characteristics
Transition frequency
I
C
= 10 mA,
V
CE
= 8 V,
f = 500 MHz
f
T
6
8
-
GHz
Collector-base capacitance
V
CB
= 10 V,
f = 1 MHz
C
cb
-
0.24
0.4
pF
Collector-emitter capacitance
V
CE
= 10 V,
f = 1 MHz
C
ce
-
0.11
-
Emitter-base capacitance
V
EB
= 0.5 V,
f = 1 MHz
C
eb
-
0.35
-
Noise figure
I
C
= 2 mA,
V
CE
= 8 V,
Z
S
=
Z
Sopt
f = 900 MHz
f = 1.8 GHz
F
-
-
1.8
1.45
-
-
dB
Power gain
1)
I
C
= 5 mA,
V
CE
= 8 V,
f = 900 MHz
Z
S
=
Z
Sopt,
Z
L
=
Z
Lopt
G
ms
-
19
-
Power gain
2)
I
C
= 5 mA,
V
CE
= 8 V,
f = 1.8 GHz
Z
S
=
Z
Sopt,
Z
L
=
Z
Lopt
G
ma
-
14.5
-
Transducer gain
I
C
= 5 mA,
V
CE
= 8 V,
Z
S
=
Z
L
= 50
f = 900 MHz
f = 1.8 GHz
|
S
21e
|
2
-
-
10.5
15.5
-
-
1)
G
ms
= |
S
21
/
S
12
|
2)
G
ma
= |
S
21
/
S
12
| (k-(k
2
-1)
1/2
)