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SMA428A中文资料

SMA428A中文资料
SMA428A中文资料

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PRELIMINARY DATA

March, 10 2003

SMA428A

High Gain, Low Noise Amplifier

R thjs

Thermal Resistance Junction soldering point

200

o C/W

Symbol Parameter

Value Unit V cc Device voltage 4

V V out Voltage at pin Out 4V V GS Voltage at pin GS 3.5V I tot Total Device Current 12mA I in Current into pin In

0.5mA P tot Total dissipation, T s < 125 o C 60mW P IN Input Power

8dBm

T op Operating temperature -40 to +85o C T stg Storage temperature

-65 to +150

o C T j

Max. operating junction temperature

150

o C

ORDER CODE SMA428ATR

BRANDING

TBD

SOT323-6L (SC70)

?HIGH GAIN Gp = 21 dB at 1.85 GHz

?LOW NOISE FIGURE NF = 1.3 dB at 1.85 GHz ?LOW CURRENT CONSUMPTION 5.9 mA ?OPEN COLLECTOR OUTPUT ?TYPICAL SUPPLY VOLTAGE: 2.4-3 V ?GAIN-STEP-MODE (36dB)

?ULTRA MINIATURE SOT323-6L PACKAGE (LEAD FREE)APPLICATIONS

?LNA FOR CELLULAR MARKET (ideal for GSM900, DCS1800 and PCS1900).?LNA FOR GPS APPLICATIONS

DESCRIPTION

High gain and low noise figures make the SMA428A an ideal solution for Low Noise Amplifiers and receiver front end stages up to 2.5 GHz. SMA428A’s typical supply voltage range is 2.4 to 3.3 volts. It shows excellent performances in terms of NF, Gain and current consumption, using just 3 external matching components. Applying supply voltage to the GS pin and grounding Vcc pin, it provides a reduced gain step of 35dB. SMA428A is housed in ultra miniature SOT323-6L package(LEAD FREE), the relative dimensions are 1.15mmx1.8mm with 0.8mm thickness.ABSOLUTE MAXIMUM RATINGS

THERMAL RESISTANCE

SMA428A

Test Circuit (Fig. 1)

Typical application circuit (Fig. 2)

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SMA428A

ELECTRICAL CHARACTERISTICS

(Ta = +25o C, V CC = 2.7V, tested in circuit shown in fig.1, unless otherwise specified)

Symbol

Parameters

Test Conditions

Min

Typ Max

Unit f Frequency Range 1850MHz I tot Total device current 5.97.5mA Gp Power Gain

18

21dB NF Noise Figure (Zs = 50 ?)

1.3

1.7dB P -1dB Input Power at 1 dB Gain Compression -23dBm IIP3Input third order intercept point -13dBm L GS

Insertion Loss in Gain-Step-Mode Vcc = 0.0 V, V CTRL = 2.7 V,

R CTRL = 3 k ?11

18

dB I CTR

Current consumption in Gain-Step-Mode

Vcc = 0.0 V, V CTRL

= 2.7 V,

R CTRL = 3 k ?

0.33

mA

SMA428A

S-Parameters ( Z L = Z S = 50 ?, V CC = 2.7V, measured in application circuit shown in fig.2)

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SMA428A TYPICAL PERFORMANCE

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SMA428A

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TAPE & REEL DIMENSIONS

mm

MIN.TYP.MAX

A

178.5179179.5

C12.813.013.5

D20.2

N54.55555.5

T14.4

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

428

428

428

428

SMA428A

SOT323-6L MECHANICAL DATA

mm Inch

DIM.

MIN.TYP.MAX MIN.TYP.MAX

A0.8 1.10.0310.043

A100.100.004

A20.810.00310.039

b0.150.30.0060.012 c0.10.180.0040.007

D 1.8 2.20.0710.088

E 1.15 1.350.0450.59

e0.650.025

H 1.8 2.40.0710.094

Q0.10.40.0040.016

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SMA428A

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

? 2003 STMicroelectronics - All Rights Reserved

All other names are the property of their respective owners.

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