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 BFR181
NPN Silicon RF Transistor For low noise, high-gain broadband amplifiers at collector currents from 0.5 mA to 12 mA fT = 8 GHz F = 1.45 dB at 900 MHz
3
Junction temperature Ambient temperature Storage temperature Thermal Resistance
1T is measured on the collector lead at the soldering point to the pcb S 2For calculation of R please refer to Application Note Thermal Resistance
thJA
1
Junction - soldering point2)

2 1
VPS05161
ESD: Electrostatic discharge sensitive device, observe handling precaution!
Type BFR181
Maximum Ratings Parameter
Marking RFs 1=B
Pin Configuration 2=E
Symbol VCEO VCES VCBO VEBO IC IB Ptot Tj TA Tstg
Package SOT23
Value 12 20 20 2 20 2 175 150 -65 ... 150 -65 ... 150 mW C mA Unit V
3=C
Collector-emitter voltage Collector-emitter voltage Collector-base voltage Emitter-base voltage Collector current Base current Total power dissipation TS 91 C 1)
RthJS
335
K/W
Jul-30-2001
BFR181
Electrical Characteristics at TA = 25C, unless otherwise specified. Parameter DC characteristics Collector-emitter breakdown voltage IC = 1 mA, IB = 0 Collector-emitter cutoff current VCE = 20 V, VBE = 0 Collector-base cutoff current VCB = 10 V, IE = 0 Emitter-base cutoff current VEB = 1 V, IC = 0 DC current gain IC = 5 mA, VCE = 8 V hFE 50 100 200 IEBO 1 A ICBO 100 nA ICES 100 A V(BR)CEO 12 V Symbol min. Values typ. max. Unit
2
Jul-30-2001
BFR181
Electrical Characteristics at TA = 25C, unless otherwise specified. Parameter AC characteristics (verified by random sampling) Transition frequency IC = 10 mA, VCE = 8 V, f = 500 MHz Collector-base capacitance VCB = 10 V, f = 1 MHz Collector-emitter capacitance VCE = 10 V, f = 1 MHz Emitter-base capacitance VEB = 0.5 V, f = 1 MHz Noise figure IC = 2 mA, VCE = 8 V, ZS = ZSopt , f = 900 MHz f = 1.8 GHz Power gain, maximum stable 1) IC = 5 mA, VCE = 8 V, ZS = ZSopt , ZL = ZLopt , f = 900 MHz Power gain, maximum available 2) IC = 5 mA, VCE = 8 V, ZS = ZSopt , ZL = ZLopt , f = 1.8 GHz Transducer gain IC = 5 mA, VCE = 8 V, ZS = ZL = 50 , f = 900 MHz f = 1.8 GHz
1G ms 2G ma
Symbol min. fT Ccb Cce Ceb F Gms 6 -
Values typ. 8 0.26 0.18 0.3 max. 0.45 -
Unit
GHz pF
dB 1.45 1.8 18 -
Gma
-
11.5
-
|S21e|2 14 9 -
= |S21 / S12 | = |S21 / S12 | (k-(k2-1)1/2)
3
Jul-30-2001
BFR181
SPICE Parameters (Gummel-Poon Model, Berkley-SPICE 2G.6 Syntax) : Transistor Chip Data
IS = VAF = NE = VAR = NC = RBM = CJE = TF = ITF = VJC = TR = MJS = XTI =
0.0010519 fA 22.403 1.7631 5.1127 1.6528 6.6315 1.8168 17.028 1.0549 1.1633 2.7449 0 3 V V fF ps mA V ns -
BF = IKF = BR = IKR = RB = RE = VJE = XTF = PTF = MJC = CJS = XTB = FC =
96.461 0.12146 16.504 0.24951 9.9037 2.1372 0.73155 0.33814 0 0.30013 0 0 0.99768
A A
NF = ISE = NR = ISC = IRB = RC = MJE = VTF = CJC = XCJC = VJS = EG = TNOM
0.90617 12.603 0.87757 0.01195 0.69278 2.2171 0.43619 0.12571 319.69 0.082903 0.75 1.11 300
fA fA mA -
V deg fF -
V fF V eV K
All parameters are ready to use, no scalling is necessary. Extracted on behalf of Infineon Technologies AG by: Institut fur Mobil-und Satellitentechnik (IMST)
Package Equivalent Circuit:
L BI = L BO = L EI = L EO = L CI = L CO = C BE = C CB = C CE =
0.85 0.51 0.69 0.61 0 0.49 73 84 165
fF fF
Valid up to 6GHz
For examples and ready to use parameters please contact your local Infineon Technologies distributor or sales office to obtain a Infineon Technologies CD-ROM or see Internet: http://www.infineon.com/silicondiscretes
4
Jul-30-2001
nH nH nH nH nH nH fF
BFR181
Total power dissipation Ptot = f (TS )
200
mW
160 140
P tot
TS
120 100 80 60 40 20 0 0 120 C
20
40
60
80
100
150
TS
Permissible Pulse Load RthJS = f (tp )
Permissible Pulse Load
Ptotmax/P totDC = f (tp)
10 3 10 2
K/W
Ptotmax / PtotDC
-
10 2
10 1
0.5 0.2 0.1 0.05 0.02 0.01 0.005 D=0
D=0 0.005 0.01 0.02 0.05 0.1 0.2 0.5
RthJS
10 1 -7 10
10
-6
10
-5
10
-4
10
-3
10
-2
s
10
0
10 0 -7 10
10
-6
10
-5
10
-4
10
-3
10
-2
s
10
0
tp
tp
5
Jul-30-2001
BFR181
Collector-base capacitance Ccb = f (VCB )
Transition frequency f T = f (I C)
V CE = Parameter
f = 1MHz
10
GHz 10V 8V 5V
0.45
pF
0.35
8 7
Ccb
0.30
fT
0.25
6
3V
5 0.20 4 0.15 3
1V 2V
0.10 0.05 0.00 0
2 1 0 0
0.7V
4
8
12
16
V
22
2
4
6
8
10
12
14 mA
17
VCB
IC
Power Gain Gma , Gms = f(IC )
f = 0.9GHz VCE = Parameter
20
Power Gain Gma, Gms = f(I C)
f = 1.8GHz VCE = Parameter
14
dB
dB 10V 5V
10V 3V
10 16
3V 2V
G
G
2V
8
14 6
1V
12 4
1V 0.7V
10
2
0.7V
8 0
2
4
6
8
10
12
14 mA
18
0 0
2
4
6
8
10
12
14 mA
18
IC
IC
6
Jul-30-2001
BFR181
Power Gain Gma , Gms = f(VCE):_____
|S21|2 = f(VCE):--------f = Parameter
20
Intermodulation Intercept Point IP3=f(IC)
(3rd order, Output, ZS=ZL=50) VCE = Parameter, f = 900MHz
24
dBm
IC=5mA
dB 0.9GHz
8V
20 18
5V
16
16
IP 3
3V
G
0.9GHz
14 12
2V
14 10 8
1V
12
1.8GHz
10
1.8GHz
6 4 2 0
8
6 0
2
4
6
8
V
12
-2 0
2
4
6
8
10
12
14
16
V
20
VCE
IC
Power Gain Gma , Gms = f(f)
VCE = Parameter
30
dB
Power Gain |S21|2= f(f)
V CE = Parameter
25
IC=5mA
dB
IC =5mA
26 24
G
20 18 16 14 12 10 8 6 4 0.0 0.5 1.0 1.5 2.0 2.5
10V 1V 0.7V GHz
S21
22
15
10
5
10V 1V 0.7V
3.5
0 0.0
0.5
1.0
1.5
2.0
2.5
GHz
3.5
f
f
7
Jul-30-2001


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