Datasheet START405TR, START405 Datasheet (SGS Thomson Microelectronics)

• LOW NOISE FIGURE: NFmin = 1.1dB

@ 1.8GHz, 2mA, 2V

• COMPRESSION P1dB = 5dBm
@ 1.8GHz, 5mA, 2V

• TRANS I TI ON FR E QU E NC Y 42 GHz

• LOW CURRENT CONSUMPTION

• ULTRA MINIATURE SOT343 PACKAGE

START405

NPN Silicon RF Transistor

SOT343 (SC70)

ORDER CODE

START405TR

BRANDING

405

DESCRIPTION

The START405 is a member of the START family
that provide the state of the art of RF silicon process

APPLICATIONS

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).

• LNA FOR GSM/DCS, DECT, PCS, PCN,
CDMA, W-CDMA

• GENERAL PURPOSE 500MHz-5GHz

It offers performance level only archi ve d with G aAs
products before.

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 10 mA
Base current 1 mA
Total dissipation, Ts = TBD
Storage temperature -65 to 150

Max. operating junction temperature 150

45 mW

o

C

o

C

ABSOLUTE MAXIMUM RATINGS

R

thjs

Thermal Resistance Junction soldering point 270

o

C/W

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START405

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 = 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

|S21|

Gms

P

-1dB

OIP3

Note(1): Gms = | S21 / S12 |

PINOUT

Collector cutoff current Vcb =5V, Ie = 0A 150 nA

Emitter-base cutoff

current

2

(1)

Insertion power gain Ic = 5mA, Vce = 2V, f = 1.8GHz 17.4 dB

Maximum stable gain Ic = 5mA, Vce = 2V, f = 1.8GHz 24.2 dB

1dB compression point Ic = 5mA,Vce = 2V, f = 1.8GHz 5 dBm

Ouput third order

intercept point

4

3

Top vie

12

SOT343

Veb = 1.5V, Ic = 0A 15 µA

Ic = 5mA,Vce = 2V, f = 1.8GHz 15 dBm

PIN CONNECTION

Pin No. Description

1BASE
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 0.5 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

o

IKF

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

{0.151*((T(

300.15)^(-1.774)}

C)+273.15)/

NC 1.312 TF 4.1E-12

C2

C2

C=5 fF

C=5 fF

START405

L4

.

.

B .

B .

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 accu racy simulation in the saturation region. ST Spice library is compa tible 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

L4

L=0.6 nH

L=0.6 nH

B’ C’

B’ C’

L3 L5 L6

L3 L5 L6

L=0.35 nH

L=0.35 nH

C1

C1

Transistor

Transistor

Chip

Chip

E’

E’

L=0.3 nH

L=0.3 nH

L1

L1

.

.

L=0.15 nHL2

L=0.15 nHL2

.

.

E

E

..

L=0.3 nH L=0.6 nH

L=0.3 nH L=0.6 nH

C3

C3

C=30 0 fFC=430 fF

C=30 0 fFC=430 fF

..

C

C

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 )

S

FREQ

(MHz)

0.1

0.5

0.9
1

1.5

1.8
2

2.5
3

3.5
4

IS11IIS

∠Φ

21

0.903 -5 12.29 176 0.007 95 0.991 -2

0.882 -23 10.96 174 0.014 97 0.971 -11

0.825 -38 9.71 174 0.021 98 0.918 -19

0.809 -41 9.42 175 0.022 99 0.906 -20

0.713 -53 8.11 177 0.027 107 0.850 - 24

0.674 -58 7.43 180 0.028 114 0.829 - 27

0.642 -61 6.99 178 0.028 122 0.820 - 28

0.579 -64 6.01 172 0.028 148 0.815 - 30

0.523 -64 5.12 164 0.030 175 0.815 - 31

0.462 -67 4.31 156 0.039 131 0.787 - 35

0.372 -78 3.48 146 0.065 94 0.644 -41

S

IIS

∠Φ

IS12∠Φ IS22IS22∠Φ

12

4/7

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) 4.0 4.2 (cumulative 10 Po)

P 4.0

DEVICE ORIENTATION

TOP VIEW END VIEW

405 405 405 405

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START405

PACKAGE DIMENSIONS SOT 343 (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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START405

p

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