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START420
NPN Silicon RF Transistor
* LOW NOISE FIGURE: NFmin = 1.05dB @ 1.8GHz, 5mA, 2V * COMPRESSION P1dB = 12.5dBm @ 1.8GHz, 20mA, 2V * ULTRA MINIATURE SOT343 PACKAGE
SOT343 (SC70) ORDER CODE START420TR BRANDING 420
DESCRIPTION The START420 is a member of the START family that provide market with the state of the art of RF silicon process. 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 reaches performance level only achieved with GaAs products before.
APPLICATIONS * LNA FOR GSM/DCS, DECT, PDC, PCS, PCN * PREDRIVER FOR DECT * GENERAL PURPOSE 500MHz-5GHz
ABSOLUTE MAXIMUM RATINGS
Symbol Vceo Vcbo Vebo Ic Ib Ptot Tstg Tj Collector emitter voltage Collector base voltage Emitter base voltage Collector current Base current Total dissipation, Ts = 101 Storage temperature Max. operating junction temperature Parameter Value 4.5 15 1.5 40 4 180 -65 to 150 150 Unit V V V mA mA mW
oC oC
ABSOLUTE MAXIMUM RATINGS
Rthjs Thermal Resistance Junction soldering point 270
oC/W
July, 3 2002
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ELECTRICAL CHARACTERISTICS (Tj=25 oC,unless otherwise specified)
Symbol Icbo Iebo Hfe NFmin Ga |S21|2 Gms
(1)
Parameter Collector cutoff current Emitter-base cutoff current DC current gain Minimim noise figure NFmin associated gain Insertion power gain Maximum stable gain 1dB compression point Ouput third order intercept point
Test Conditions Vcb = 5V, Ie = 0A Veb = 1.5V, Ic = 0A Ic = 20mA, Vce = 3V Ic = 5mA, Vce = 2V, f = 1.8GHz, Zs = Zsopt Ic = 5mA, Vce = 2V, f = 1.8GHz Ic = 20mA, Vce = 2V, f = 1.8GHz Ic = 20mA, Vce = 2V, f = 1.8GHz Ic = 20mA,Vce = 2V, f = 1.8GHz Ic = 20mA,Vce = 2V, f = 1.8GHz
Min.
Typ.
Max. 150 15
Unit nA A
100
150 1.05 16 19.5 22.6 12.5 23 dB dB dB dB dBm dBm
P-1dB OIP3
Note(1): Gms = | S 21 / S12 |
PINOUT
4
3
PIN CONNECTION
Top view
1 2
Pin No. 1 3 2,4
Description BASE COLLECTOR EMITTER
SOT343
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SPICE PARAMETERS (Gummel-Poon Model, Berkley-SPICE 2G.6 Syntax) TRANSISTOR CHIP DATA
Symbol TMEAS IS ISE NR ISC IKF TR XTF RB RC CJE CJC CJS Value 27.0 1.00E-16 1.58E-11 1 1.55E-15 {0.217*((T(oC)+273.15)/ 300.15)^(-1.63)} 7E-10 9.84 12.86 3.7 421E-15 160E-15 112E-15 Symbol FC EG NF NE BR NC PTF ITF RBM RE VJE VJC VJS Value 0.66 1.12 1 3.1 9.52 1.495 32.0 0.498 5 0.42 1.03 0.6 0.4 Symbol XJBC XTI BF VAF VAR TF VTF MJE MJC MJS IKR XTB Value 0.53 3.76 280 70 2.3 3.0E-12 27.9 0.497 0.292 0.245 8.32E-3 -0.54
PACKAGE EQUIVALENT CIRCUIT
C2 C=66 fF
B
.
L4 L=0.6 nH
.
L3
B'
L=0.35 nH
Transistor Chip E'
L1
C'
L5 L=0.3 nH
.
L6 L=0.6 nH
.
C
L=0.1 nH
C1 C=436 fF L2
. .
E
C3 C=334 fF L=0.05 nH
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
1.173
Vjj
0.8
ENP
2.085
VRP
{4.12*((TEMPER+273.15)/300.15)^(0.303)}
RP
1.00E-6 3/7
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COMMON EMITTER S-PARAMETERS ( VCE = 2V, IC = 20mA )
FREQ
(MHz) 0.1 0.5 0.9 1 1.5 1.8 2 2.5 3 3.5 4
IS11I 0.700 0.545 0.480 0.476 0.484 0.494 0.503 0.513 0.533 0.552 0.559
S11 -22 -90 -130 -137 -167 180 172 158 148 140 134
IS21I 42.223 27.116 18.322 16.756 11.532 9.528 8.390 6.364 4.936 4.546 3.873
S21 164 120 98 94 77 68 63 54 46 37 28
IS12I 0.010 0.027 0.036 0.038 0.048 0.052 0.055 0.061 0.069 0.077 0.085
S12 89 58 48 47 42 39 37 32 27 21 14
IS22I 0.932 0.632 0.421 0.387 0.263 0.210 0.183 0.148 0.143 0.153 0.154
S22 -12 -51 -71 -75 -96 -111 -123 -154 -171 178 163
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TAPE & REEL DIMENSIONS
mm MIN. A C D N T Ao Bo Ko Po P 3.8 (cumulative 10 Po) 2.25 2.7 1.2 4.0 4.0 4.2 (cumulative 10 Po) 178.5 12.8 20.2 54.5 55 55.5 14.4 TYP. 179 13.0 MAX 179.5 13.5
DEVICE ORIENTATION
TOP VIEW END VIEW
420
420
420
420
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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 0.45
0.10-0.20
0.25-0.35
0.00-0.10
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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. The ST logo is registered trademark of STMicroelectronics (R) 2002 STMicroelectronics - All Rights Reserved All other names are the property of their respective owners. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com
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