• COMPRESSI ON POIN T P1dB=19dB m @ 1.8G Hz
• TRANS I TI ON FR E QU E NC Y 42 GHz
• HIGH LINEARITY
• ULTRA MINIATURE SOT343(SC70) PACKAGE
START450
NPN Silicon RF Transistor
SOT343 (SC70)
ORDER CODE
START450TR
BRANDING
450
DESCRIPTION
The START450 is a member of the START family that
provide the state of the art of RF silicon process to the
market. Manufacturated in the third gen eration of ST
proprietary bipolar process, it offers the best mix of
gain and NF for given breakdown voltage(BVceo).
It offers performance level only archived with GaAs
products before.
APPLICATIONS
• LNA FOR GSM/DCS, DECT, PCS, PCN,
CDMA, W-CDMA
• PREDRIVER FOR DECT
• GENERAL PURPOSE 500MHz-5GHz
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
ceo
V
cbo
V
ebo
I
c
I
b
P
tot
T
stg
T
j
Collector emitter voltage 4.5 V
Collector base voltage 15 V
Emitter base voltage 1.5 V
Collector current 100 mA
Base current 10 mA
Total dissipation, Ts = TBD
Storage temperature -65 to 150
Max. operating junction temperature 150
450 mW
o
C
o
C
ABSOLUTE MAXIMUM RATINGS
R
thjs
Thermal Resistance Junction soldering point MAX ≤ 120
o
C/W
1/7November, 20 2002
START450
w
ELECTRICAL CHARACTERISTICS (Tj=25 oC,unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
cbo
I
ebo
Hfe DC current gain Ic = 50mA, Vce = 4V 160
NFmin Minimim noise figure
Ga NFmin associated gain Ic = 10mA, Vce = 2V, f = 1.8GHz 13 dB
|S21|
Gms
P
-1dB
OIP3
Note(1) : Gm s = | S21 / S12 |
Collector cutoff current Vcb = 5V, Ie = 0A 150 nA
Emitter-base cutoff
current
2
(1)
Insertion power gain Ic = 50mA, Vce = 2V, f = 1.8GHz 13.7 dB
Maximum stable gain Ic = 50mA, Vce = 2V, f = 1.8GHz 19.1 dB
1dB compression point Ic = 50mA,Vce = 3V, f = 1.8GHz 19 dBm
Ouput third order
intercept point
Veb = 1.5V, Ic = 0A 15 µA
Ic = 10mA, Vce = 2V, f = 1.8GHz,
Ic = 50mA,Vce = 3V, f = 1.8GHz 29 dBm
Z
s
= Zsopt
1.2 dB
PINOUT
4
12
SOT343
PIN CONNECTION
3
Top vie
Pin No. Description
1 BASE
3 COLLECTOR
2,4 EMITTER
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SPICE PARAMETERS (Gummel-Poon Model, Berkley-SPICE 2G.6 Syntax)
TRANSISTOR CHIP DATA
Symbol Value Symbol Value Symbol Value
TMEAS 27.0 FC 0.8 XJBC 0.3
IS 1.9E-16 EG 1.12 XTI 4.51
ISE 1.9E-12 NF 1 BF 295
NR 1 NE 2.658 VAF 40
ISC 3.19E-15 BR 13.7 VAR 2.5
o
IKF
TR 7E-10 PTF 35 VTF 27
XTF 20 ITF 4.8 MJE 0.44
RB 2.7 RBM 0.64 MJC 0.31
RC 1.38 RE 0.15 MJS 0.281
CJE 1462E-15 VJE 1.1 IKR 43.5E-3
CJC 660E-15 VJC 0.84 XTB -0.32
CJS 425E-15 VJS 0.453
{1.448*((T(
C)+273.15)/
300.15)^(-1.6)}
NC 1.5 TF 3.1E-12
PACKAGE EQUIVALENT CIRCUIT
C2
C2
C=21 fF
C=21 fF
START450
L4
.
.
B .
B .
L4
L=0.3 nH
L=0.3 nH
B’ C’
B’ C’
L3 L5 L6
L3 L5 L6
L=0.8 nH
L=0.8 nH
C1
C1
Transistor
Transistor
Chip
Chip
E’
E’
L=0.15 nH
L=0.15 nH
L1
L1
.
.
L=0.05 nHL2
L=0.05 nHL2
.
.
E
E
..
L=0.1 nH L=0.3 nH
L=0.1 nH L=0.3 nH
C3
C3
C=785 fFC=740 fF
C=785 fFC=740 fF
..
C
C
In order to avoid high complexity of the package equivalent circuit, the two emitter leads of SOT-343
package are combined in one electrical connection.
FOR MORE ACCURACY SIMULATION IN SATURATION REGION :
Adding the 5 Spice parameters showed in Table A and using ST Spice Library (available on request) you
can achieve a more accuracy simulation in t he saturation region. ST Spice library is compatible with
following simulators: ELDO MENTOR (any version), SPECTRE CADENCE (any version), ADS (version
2001 only).
Table A (Spice Parameters extracted in saturation region)
RW Vjj ENP VRP RP
2.594 0.769 2.45 {4.64*((TEMPER+273.15)/300.15)^(1.5)} 1.00E-6
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START450
COMMON EMITTER S-PARAMETERS ( VCE = 2V, IC = 50mA )
FREQ
(MHz)
0.1
0.5
0.9
1
1.5
1.8
2
2.5
3
3.5
4
IS11IIS
S
∠Φ
IIS
S
21
∠Φ
IS12∠Φ IS22IS22∠Φ
12
0.572 -112 61.291 137 0.017 50 0.723 -75
0.740 -167 17.769 111 0.022 60 0.545 -149
0.747 -178 9.937 113 0.026 93 0 . 539 -163
0.744 179 8.736 114 0.025 103 0.534 -166
0.726 172 5.913 125 0.059 146 0.526 -171
0.715 167 4.893 128 0.060 157 0.520 -173
0.699 165 4.484 131 0.086 163 0.510 -175
0.646 158 3.661 139 0.128 172 0.481 -174
0.582 153 2.879 146 0.145 177 0.452 -173
0.523 150 2.195 154 0.189 170 0.449 -173
0.441 153 1.733 175 0.211 151 0.381 -178
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START450
TAPE & REEL DIMENSIONS
mm
MIN. TYP. MAX
A 178.5 179 179.5
C 12.8 13.0 13.5
D 20.2
N 54.5 55 55.5
T 14.4
Ao 2.25
Bo 2.7
Ko 1.2
Po 3.8 (cumulative 10 Po) 4.0 4.2 (cumulative 10 Po)
P 4.0
DEVICE ORIENTATION
TOP VIEW END VIEW
450 450 450 450
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START450
PACKAGE DIMENSIONS SOT343 (SC-70 4 leads)
1.30
1.15-1.35
2.00-2.20
1.90-2.10
0.80-1.00
0.25-0.35 0.00-0.10
1.15
0.55-0.65
1.15-1.35
0.45
0.10-0.20
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START450
p
Information furnished is believed to be accurate an d rel i able. However, STMicroelectro ni cs assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implic ation or otherwise under any patent or patent ri ghts of STM i croelectr onics. Specifications menti oned in thi s publicati on are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics product s are not
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