START405
NPN Silicon RF Transistor
• LOW NOISE FIGURE: NFmin = 1.1dB
@ 1.8GHz, 2mA, 2V
• COMPRESSION P1dB = 5dBm
@ 1.8GHz, 5mA, 2V
• TRANSITION FREQUENCY 42GHz
• LOW CURRENT CONSUMPTION
• ULTRA MINIATURE SOT343 PACKAGE
SOT343 (SC70)
ORDER CODE
START405TR
DESCRIPTION
The START405 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
generation 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.
BRANDING
405
APPLICATIONS
• LNA FOR GSM/DCS, DECT, PCS, PCN,
CDMA, W-CDMA
• GENERAL PURPOSE 500MHz-5GHz
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
4.5
V
Vceo
Collector emitter voltage
Vcbo
Collector base voltage
15
V
Vebo
Emitter base voltage
1.5
V
Ic
Collector current
10
mA
Ib
Base current
1
mA
45
mW
Ptot
Total dissipation, Ts = TBD
Tstg
Storage temperature
Tj
Max. operating junction temperature
-65 to 150
o
150
o
C
C
ABSOLUTE MAXIMUM RATINGS
Rthjs
July, 3 2002
Thermal Resistance Junction soldering point
270
o
C/W
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START405
ELECTRICAL CHARACTERISTICS (Tj=25 oC,unless otherwise specified)
Symbol
Parameter
Test Conditions
Max.
Unit
Icbo
Collector cutoff current
Vcb =5V, Ie = 0A
Min.
Typ.
150
nA
Iebo
Emitter-base cutoff
current
Veb = 1.5V, Ic = 0A
15
µA
Hfe
DC current gain
Ic = 5mA, Vce = 4V
160
NFmin
Minimim noise figure
Ic = 2mA, Vce = 2V, f = 1.8GHz
1.1
dB
Ga
NFmin associated gain
Ic = 2mA, Vce = 2V, f = 1.8GHz
19
dB
Insertion power gain
Ic = 5mA, Vce = 2V, f = 1.8GHz
17.4
dB
|S21|2
(1)
Maximum stable gain
Ic = 5mA, Vce = 2V, f = 1.8GHz
24.2
dB
P-1dB
1dB compression point
Ic = 5mA,Vce = 2V, f = 1.8GHz
5
dBm
OIP3
Ouput third order
intercept point
Ic = 5mA,Vce = 2V, f = 1.8GHz
15
dBm
Gms
Note(1): Gms = | S21 / S12 |
PINOUT
4
PIN CONNECTION
3
Top view
1
2
SOT343
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Pin No.
Description
1
BASE
3
COLLECTOR
2,4
EMITTER
START405
SPICE PARAMETERS (Gummel-Poon Model, Berkley-SPICE 2G.6 Syntax)
TRANSISTOR CHIP DATA
Symbol
Value
Symbol
Value
Symbol
Value
TMEAS
27.0
FC
0.5
XJBC
0.3
IS
1.9E-17
EG
1.12
XTI
3.57
ISE
1.58E-13
NF
1
BF
340
NR
1
NE
2.711
VAF
79
ISC
7.40E-17
BR
8.59
VAR
2.35
IKF
{0.151*((T(oC)+273.15)/
300.15)^(-1.774)}
NC
1.312
TF
4.1E-12
TR
7E-10
PTF
38
VTF
14.7
XTF
42
ITF
0.42
MJE
0.414
RB
34.07
RBM
6.1
MJC
0.266
RC
7.9
RE
1.25
MJS
0.22
CJE
111E-15
VJE
1.1
IKR
2.29E-3
CJC
53E-15
VJC
0.69
XTB
-0.744
CJS
33E-15
VJS
0.4
PACKAGE EQUIVALENT CIRCUIT
C2
C=5 fF
B
.
L4
L=0.6 nH
.
L3
B’
L=0.35 nH
Transistor
Chip
C’
L5
L=0.3 nH
.
L6
L=0.6 nH
.
C
E’
L=0.3 nH
L1
.
C1
C=430 fF
L2
C3
C=300 fF
L=0.15 nH
.
E
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 the 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
2.045
{8.67*((TEMPER+273.15)/300.15)^(0.839)}
1.00E-6
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START405
COMMON EMITTER S-PARAMETERS ( VCE = 2V, IC = 5mA )
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FREQ
IS11I
S11∠Φ
IS21I
S21∠Φ
IS12I
S12∠Φ
IS22I
S22∠Φ
(MHz)
0.1
0.5
0.9
1
1.5
1.8
2
2.5
3
3.5
4
0.903
0.882
0.825
0.809
0.713
0.674
0.642
0.579
0.523
0.462
0.372
-5
-23
-38
-41
-53
-58
-61
-64
-64
-67
-78
12.29
10.96
9.71
9.42
8.11
7.43
6.99
6.01
5.12
4.31
3.48
176
174
174
175
177
180
178
172
164
156
146
0.007
0.014
0.021
0.022
0.027
0.028
0.028
0.028
0.030
0.039
0.065
95
97
98
99
107
114
122
148
175
131
94
0.991
0.971
0.918
0.906
0.850
0.829
0.820
0.815
0.815
0.787
0.644
-2
-11
-19
-20
-24
-27
-28
-30
-31
-35
-41
START405
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)
P
4.0
4.2 (cumulative 10 Po)
4.0
DEVICE ORIENTATION
TOP VIEW
405
405
405
END VIEW
405
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START405
PACKAGE DIMENSIONS SOT343 (SC-70 4 leads)
1.30
1.15-1.35
2.00-2.20
1.15
0.55-0.65
1.90-2.10
1.15-1.35
0.80-1.00
0.25-0.35
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0.00-0.10
0.45
0.10-0.20
START405
Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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2002 STMicroelectronics - All Rights Reserved
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