Semiconductor Group
1
Dec-11-1996
BFR 280W
NPN Silicon RF Transistor
For low noise, low-power amplifiers in mobile
communication systems (pager, cordless
telephone) at collector currents from 0.2mA to 8mA
f
T
= 7.5GHz
F = 1.5dB at 900MHz
ESD: Electrostatic discharge sensitive device, observe handling precaution!
Type
Marking Ordering Code
Pin Configuration
Package
BFR 280W
REs
Q62702-F1494
1 = B
2 = E
3 = C
SOT-323
Maximum Ratings
Parameter
Symbol
Values
Unit
Collector-emitter voltage
V
CEO
8
V
Collector-emitter voltage
V
CES
10
Collector-base voltage
V
CBO
10
Emitter-base voltage
V
EBO
2
Collector current
I
C
10
mA
Base current
I
B
1.2
Total power dissipation
T
S
115 C
P
tot
80
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
435
K/W
1)
T
S
is measured on the collector lead at the soldering point to the pcb.
Semiconductor Group
2
Dec-11-1996
BFR 280W
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
8
-
-
V
Collector-emitter cutoff current
V
CE
= 10 V,
V
BE
= 0
I
CES
-
-
100
A
Collector-base cutoff current
V
CB
= 8 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
= 3 mA,
V
CE
= 5 V
h
FE
30
100
200
-
Semiconductor Group
3
Dec-11-1996
BFR 280W
Electrical Characteristics at
T
A
= 25C, unless otherwise specified.
Parameter
Symbol
Values
Unit
min.
typ.
max.
AC Characteristics
Transition frequency
I
C
= 6 mA,
V
CE
= 5 V,
f = 500 MHz
f
T
5
7.5
-
GHz
Collector-base capacitance
V
CB
= 5 V,
f = 1 MHz
C
cb
-
0.32
0.5
pF
Collector-emitter capacitance
V
CE
= 5 V,
f = 1 MHz
C
ce
-
0.22
-
Emitter-base capacitance
V
EB
= 0.5 V,
f = 1 MHz
C
eb
-
0.22
-
Noise figure
I
C
= 1.5 mA,
V
CE
= 5 V,
Z
S
=
Z
Sopt
f = 900 MHz
f = 1.8 GHz
F
-
-
2
1.5
-
-
dB
Power gain
1)
I
C
= 3 mA,
V
CE
= 5 V,
Z
S
=
Z
Sopt
Z
L
=
Z
Lopt
f = 900 MHz
f = 1.8 GHz
G
ms
-
-
12
17
-
-
Transducer gain
I
C
= 3 mA,
V
CE
= 5 V,
Z
S
=
Z
L
= 50
f = 900 MHz
f = 1.8 GHz
|
S
21e
|
2
-
-
8.5
13
-
-
1)
G
ms
= |
S
21
/
S
12
|
Semiconductor Group
4
Dec-11-1996
BFR 280W
SPICE Parameters (Gummel-Poon Model, Berkeley-SPICE 2G.6 Syntax) :
Transistor Chip Data
IS =
6.472
fA
VAF =
25.609
V
NE =
1.6163
-
VAR =
5.6909
V
NC =
1.0651
-
RBM =
14.999
CJE =
36.218
fF
TF =
11.744
ps
ITF =
6.2179
mA
VJC =
1.1943
V
TR =
2.3693
ns
MJS =
0
-
XTI =
3
-
BF =
89.888
-
IKF =
0.073457
A
BR =
20.238
-
IKR =
0.012696
A
RB =
15
RE =
2.4518
VJE =
0.70035
V
XTF =
0.21585
-
PTF =
0
deg
MJC =
0.30017
-
CJS =
0
fF
XTB =
0
-
FC =
0.96275
-
NF =
1.0801
-
ISE =
15.596
fA
NR =
0.83403
-
ISC =
1.409
fA
IRB =
0.031958
mA
RC =
6.989
MJE =
0.69773
-
VTF =
0.2035
V
CJC =
252.99
fF
XCJC =
0.19188
-
VJS =
0.75
V
EG =
1.11
eV
TNOM
300
K
All parameters are ready to use, no scalling is necessary.
Extracted on behalf of SIEMENS Small Signal Semiconductors by:
Institut fr Mobil-und Satellitenfunktechnik (IMST)
1996 SIEMENS AG
Package Equivalent Circuit:
LBI =
0.57
nH
LBO =
0.4
nH
LEI =
0.43
nH
LEO =
0.5
nH
LCI =
0
nH
LCO =
0.41
nH
CBE =
61
fF
CCB =
101
fF
CCE =
175
fF
Valid up to 6 GHz
For examples and ready to use parameters please contact your local Siemens distributor or sales office to
obtain a Siemens CD-ROM or see Internet: http://www.siemens.de/Semiconductor/products/35/35.htm
Semiconductor Group
5
Dec-11-1996
BFR 280W
Total power dissipation
P
tot
=
f (T
A
*,
T
S
)
* Package mounted on epoxy
0
20
40
60
80
100
120 C 150
T
A
,T
S
0
10
20
30
40
50
60
70
80
mW
100
P
tot
T
S
T
A
Permissible Pulse Load
R
thJS
=
f (t
p
)
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
s
t
p
1
10
2
10
3
10
K/W
R
thJS
D = 0
0.005
0.01
0.02
0.05
0.1
0.2
0.5
Permissible Pulse Load
P
totmax
/
P
totDC
=
f (t
p
)
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
s
t
p
0
10
1
10
-
P
totmax
/
P
totDC
D = 0
0.005
0.01
0.02
0.05
0.1
0.2
0.5
Semiconductor Group
6
Dec-11-1996
BFR 280W
Collector-base capacitance
C
cb
=
f (V
CB
)
V
BE
=
v
be
= 0,
f = 1MHz
0
2
4
6
8
V
11
V
R
0.0
0.1
0.2
0.3
pF
0.5
C
cb
Transition frequency
f
T
=
f (I
C
)
V
CE
= Parameter
0
2
4
6
8
mA
11
I
C
0
1
2
3
4
5
6
7
8
9
GHz
11
f
T
10V
8V
5V
3V
2V
1V
0.7V
Power Gain
G
ma
,
G
ms
=
f(I
C
)
f = 0.9GHz
V
CE
= Parameter
0
2
4
6
8
mA
11
I
C
6
8
10
12
14
16
dB
20
G
10V
2V
1V
0.7V
Power Gain
G
ma
,
G
ms
=
f(I
C
)
f = 1.8GHz
V
CE
= Parameter
0
2
4
6
8
mA
11
I
C
0
2
4
6
8
10
dB
14
G
10V
3V
2V
1V
0.7V
Semiconductor Group
7
Dec-11-1996
BFR 280W
Power Gain
G
ma
,
G
ms
=
f(V
CE
):_____
|
S
21
|
2
=
f(V
CE
):---------
f = Parameter
0
2
4
6
8
V
12
V
CE
4
6
8
10
12
14
dB
18
G
0.9GHz
1.8GHz
0.9GHz
1.8GHz
I
C
=3mA
Intermodulation Intercept Point
IP
3
=
f(I
C
)
(3rd order, Output,
Z
S
=
Z
L
=50
)
V
CE
= Parameter,
f = 900MHz
0
2
4
6
8
mA
11
I
C
-12
-8
-4
0
4
8
12
dBm
20
IP
3
8V
5V
3V
2V
1V
Power Gain
G
ma
,
G
ms
=
f(f)
V
CE
= Parameter
0.0
0.5
1.0
1.5
2.0
2.5
GHz
3.5
f
0
5
10
15
20
dB
30
G
10V
1V
0.7V
I
C
=3mA
Power Gain |
S
21
|
2
=
f(f)
V
CE
= Parameter
0.0
0.5
1.0
1.5
2.0
2.5
GHz
3.5
f
0
2
4
6
8
10
12
14
16
dB
20
S
21
10V
1V
0.7V
I
C
=3mA
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