ST SMA427A User Manual
查询SMA427A供应商
• CASCADABLE 50 ohm-GAIN BLOCK
• UNCONDITIONALLY STABLE
• GAIN |S
• IP3out = +7.4 dBm at 1.575 GHz
(V
D
• NOISE FIGURE NF = 2.2 dB at 1.8 GHz
• TYPICAL DEVICE VOLTAGE V
• ULTRA MINIATURE SOT323-4L PACKAGE
(LEAD FREE)
APPLICATIONS
LNA FOR 1-2 GHz APPLICATIONS (GPS, Cellular..)
|2 = 17 dB at 1.8 GHz
21
= 3 V, ID = 9.5 mA)
= 2 V to 5 V
D
SMA427A
50 Ω / 50 Ω Low Noise Amplifier
PRELIMINARY DATA
SOT323-4L (SC70)
ORDER CODE
SMA427ATR
BLOCK DIAGRAM
BRANDING
TBD
3
3
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
4
4
mount plastic package, it embeds the state of the art
Silicon ST technology. The amplifier application
shows excellent RF performance using only two
1
1
IN
IN
external component in the 1000-2000MHz frequency
2
range.
2
GND
GND
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
+V
+V
OUT
OUT
o
C
o
C
o
C
THERMAL RESISTANCE
R
thjs
January, 7 2003
Thermal Resistance Junction soldering point TBD
o
C/W
1/6
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
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