Datasheet SMA427ATR Datasheet (SGS Thomson Microelectronics)

• CASCADABLE 50 ohm-GAIN BLOCK

• UNCONDITIONALLY STABLE

• GAIN |S

|2 = 17 dB at 1.8 GHz

21

• IP3out = +7.4 dBm at 1.575 GHz
(V

= 3 V, ID = 9.5 mA)

D

• NOISE FIGURE NF = 2.2 dB at 1.8 GHz

• TYPICAL DEVICE VOLTAGE V

= 2 V to 5 V

D

• ULTRA MINIATURE SOT323-4L PACKAGE
(LEAD FREE)

APPLICATIONS

LNA FOR 1-2 GHz APPLICATIONS (GPS, Cellular..)

DESCRIPTION

SMA427A is a product of the S MA Family (Silicon
MMIC Amplifiers). Housed in the ultra miniature
4-lead SC-70 (SOT323-4L LEAD FREE) surface
mount plastic package, it embeds the state of the art
Silicon ST technology. The amplifier application
shows excellent RF performance using only two
external component in the 1000-2000MHz frequency
range.

SMA427A

50 Ω / 50 Ω Low Noise Amplifier

PRELIMINARY DATA

SOT323-4L (SC70)

ORDER CODE

SMA427ATR

BLOCK DIAGRAM

1

1

IN

IN

2

2

GND

GND

BRANDING

TBD

3

3

+V

+V

4

4

OUT

OUT

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

D

I

D

P

tot Total dissipation, T

P

RFin

T

amb

T

stg

T

j

Device Voltage 6 V
Device Current 27 mA

= 120 oC

s

TBD mW
RF Input Power -10 dBm
Ambient Temperature -65 to +150
Storage temperature -65 to +150
Max. operating junction temperature 150

THERMAL RESISTANCE

R

thjs

January, 7 2003

Thermal Resistance Junction soldering point TBD

o

C/W

o

C

o

C

o

C

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SMA427A

w

ELECTRICAL CHARACTERISTICS

o

(Ta = +25

C, VD = 3V, Zo = 50Ω, tested in circuit shown in Appl.1, unless otherwise specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Id

2

|S21|

S12 Reverse Isolation

NF Noise Figure

IP

3out

RLin Input Return Loss

RLout Output Return Loss

Supply Current 9.5 mA

Insertion power gain

f = 1 GHz
f = 1.575 GHz
f = 1.8 GHz

f = 1 GHz
f = 1.575 GHz
f = 1.8 GHz

f = 1 GHz
f = 1.575 GHz
f = 1.8 GHz

22
18
17

27
25
20

1.8
2

2.2

Intercept point at output f = 1.575 GHz 7.4 dBm

f = 1 GHz
f = 1.575 GHz
f = 1.8 GHz

f = 1 GHz
f = 1.575 GHz
f = 1.8 GHz

>12
>12
>12

>12
>12
>12

PIN CONNECTION

dB

dB

dB

dB

dB

Typical configuration

C

J1

RF IN

B

A

4

12

SOT343

SOT343

C2
33p

3

Vcc

Pin No. Description

1IN

Top vie

1

4

SMA 427A

2 3

U1

2
1

Title

C1

+

1u

Number RevisionSize

A4

Date: 23-Jul-2002 Sheet of
File: C:\PROGETTI\ SMA DEVICE\SMA 427\SMA 427.ddbDrawn By:

2GND
3+V
4OUT

C3
10p

C4

47n

J2

RF OUT

2/6

S-Parameters

SMA427A

0

-5

-10

-15

-20

-25

S11

-30

-35

-40

-45

-50

30

28

26

24

22

20

S21

18

16

14

12

10

Vcc = 5V

500 1000 1500 2000 2500

8

500 1000 1500 2000 2500

f (MHz)

Vcc = 5V

Vcc = 3V

f (MHz)

Vcc = 3V

-10

-15

-20

-25

S12

-30

-35

-40
500 1000 1500 2000 2500

0

-5

-10

-15

-20

S22

-25

-30

-35

-40

-45
500 1000 1500 2000 2500

Vcc = 3V

Vcc = 5V

f (MHz)

Vcc = 5V

Vcc = 3V

f (MHz)

Noise Figure vs. Frequency

3

2.5

2

1.5

NF (dB)

1

0.5

0

1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000

V cc = 3V

V cc = 5V

f (MHz)

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SMA427A

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

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TOP VIEW END VIEW

427 427 427 427

PACKAGE DIMENSIONS SOT323-4L (SC-70 4 leads)

1.30

SMA427A

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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SMA427A

p

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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 rights of STMi croelectr onics. Specifications mentioned in thi s publicati on are sub j ect
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
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