STMICROELECTRONICS SMA428ATR

SMA428A
High Gain, Low Noise Amplifier
PRELIMINARY DATA
• 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)
SOT323-6L (SC70)
• ULTRA MINIATURE SOT323-6L PACKAGE (LEAD
FREE)
APPLICATIONS
• LNA FOR CELLULAR MARKET (ideal for GSM900,
DCS1800 and PCS1900).
ORDER CODE
SMA428ATR
BRANDING
TBD
BLOCK DIAGRAM
• LNA FOR GPS APPLICATIONS
Vcc, 1
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 35
dB. SMA428A is housed in ultra miniature SOT323-6L
package(LEAD FREE), the relative dimensions are
1.15mmx1.8mm with 0.8mm thickness.
GS, 4
Out, 3
In, 6
GND, 2;5
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
4
V
Voltage at pin Out
4
V
Voltage at pin GS
3.5
V
Vcc
Device voltage
Vout
VGS
Itot
Total Device Current
12
mA
Iin
Current into pin In
0.5
mA
Ptot
Total dissipation, Ts < 125 oC
60
mW
PIN
Input Power
8
dBm
Top
Operating temperature
-40 to +85
oC
Tstg
Storage temperature
-65 to +150
oC
150
oC
Tj
Max. operating junction temperature
THERMAL RESISTANCE
Rthjs
March, 10 2003
Thermal Resistance Junction soldering point
200
oC/W
1/8
SMA428A
Test Circuit (Fig. 1)
Typical application circuit (Fig. 2)
47 pF
180 pF
VCTRL
Supply
3 kΩ
RF in
100 pF
GS
In
Vcc
6.8 nH
Out
SMA428A
GND
2/8
0.5 pF
RF Out
SMA428A
ELECTRICAL CHARACTERISTICS
(Ta = +25oC, VCC = 2.7V, tested in circuit shown in fig.1, unless otherwise specified)
Symbol
f
Parameters
Min
Frequency Range
Typ
Max
1850
Itot
Total device current
Gp
Power Gain
NF
Noise Figure (Zs = 50 Ω)
P-1dB
Test Conditions
5.9
18
MHz
7.5
21
1.3
Unit
mA
dB
1.7
dB
Input Power at 1 dB Gain Compression
-23
dBm
IIP3
Input third order intercept point
-13
dBm
LGS
Insertion Loss in Gain-Step-Mode
Vcc = 0.0 V, VCTRL = 2.7 V,
RCTRL = 3 kΩ
ICTR
Current consumption in Gain-Step-Mode
Vcc = 0.0 V, VCTRL = 2.7 V,
RCTRL = 3 kΩ
11
18
0.33
dB
mA
PIN CONNECTION
(Top View)
1
2
3
(Bottom View)
6
5
4
6
5
4
Pin No.
1
2
3
Pin Name
1
VCC
2
GND
3
OUTPUT
4
GS
5
GND
6
INPUT
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SMA428A
S-Parameters ( ZL = ZS = 50 Ω, VCC = 2.7V, measured in application circuit shown in fig.2)
0
24
-1
T c = 25 °C
23
-2
T c = -40 °C
-3
T c = 25 °C
22
IRL (dB)
Gp (dB)
-4
21
-5
-6
T c = 8 5 °C
T c = 85 °C
T c = -40 °C
20
-7
-8
19
-9
18
18 00 1 81 0 1 82 0 1 83 0 1 84 0 1 85 0 1 86 0 1 87 0 1 88 0 18 90 19 00
-10
1 800 1810 1 820 183 0 1 840 1850 1 860 187 0 1 880 189 0 1 900
f (MHz )
-20
10
-22
5
-24
0
-26
-5
-28
-10
-30
-32
T c = -40 °C
T c = 25 °C
ORL (dB)
ISL (dB)
f (MHz )
-15
T c = -40 °C
Tc = 85 °C
T c = 25 °C
-20
T c = 85 °C
-34
-25
-36
-30
-38
-35
-40
180 0 18 10 1820 18 30 1840 185 0 1 860 1870 18 80 1890 190 0
-40
1 800 181 0 18 20 1 830 184 0 18 50 18 60 1 87 0 188 0 18 90 1 900
f ((MHz )
4/8
f (MHz )
SMA428A
TYPICAL PERFORMANCE
Supply Current Vs Temperature
Control Current Vs Temperature
0.5
0
0.45
-5
0.4
0.35
-1 0
-1 5
T c = 85 °C
Ictrl (mA)
Gp (dB)
0.3
T c = 25 °C
0.25
0.2
-2 0
0.15
T c = -40 °C
-2 5
0.1
0.05
-3 0
18 00 18 10 18 20 183 0 1 84 0 1 85 0 1 86 0 18 70 18 80 18 90 190 0
f (MHz )
0
-4 0
-25
25
T (°C )
50
85
OFF-Gain (Vcc = 0V, Vctrl = 2.7V, Rctrl = 3Kohm)
-1 0
-1 2
-1 4
T c = 25 °C
-1 6
Gp (dB)
-1 8
T c = 85 °C
-2 0
-2 2
T c = -40 °C
-2 4
-2 6
-2 8
-3 0
18 00 18 10 18 20 183 0 1 84 0 1 85 0 1 86 0 18 70 18 80 18 90 190 0
f (MHz )
5/8
SMA428A
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
P
4.2 (cumulative 10 Po)
4.0
DEVICE ORIENTATION
TOP VIEW
428
6/8
428
428
END VIEW
428
SMA428A
SOT323-6L MECHANICAL DATA
mm
DIM.
MIN.
A
MAX
MIN.
0.8
1.1
0.031
0.043
A1
0
0.1
0
0.004
A2
0.8
1
0.0031
0.039
b
0.15
0.3
0.006
0.012
c
0.1
0.18
0.004
0.007
D
1.8
2.2
0.071
0.088
E
1.15
1.35
0.045
0.59
e
TYP.
Inch
0.65
TYP.
MAX
0.025
H
1.8
2.4
0.071
0.094
Q
0.1
0.4
0.004
0.016
7/8
SMA428A
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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 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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