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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.
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