NJG1104KB2
- 1 -
800MHz BAND LNA GaAs MMIC
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GENERAL DESCRIPTION
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PACKAGE OUTLINE
NJG1104KB2 is a variable gain low noise amplifier (LNA).
At 800MHz band, noise figure is 1.2dB, variable gain range
is 21dB and input 3rd order intercept point is +6dBm. These
characteristics are very suitable for CDMA cellular phone
application.
The variable attenuators placed in front of LNA realize wide
range of input power with low distortion.
Very small and thin FLP6-B2 package is adopted.
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FEATURES
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Low voltage operation
+2.8V typ.
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Low current consumption
6.0mA typ.
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High gain
15dB typ. @f=865MHz
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Low noise figure
1.2dB typ. @f=865MHz
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Variable gain control
21dB typ. @f=865MHz,V
CONT
=0.2 to 1.7V
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High input IP3
+6dBm typ. @f=865.0+865.1MHz, P
in
=-30dBm
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High output IP3
+21dBm typ. @f=865.0+865.1MHz, P
in
=-30dBm
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Ultra small & ultra thin package
FLP6-B2 (Mount Size: 2.1x2.0x0.75mm)
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PIN CONFIGURATION
NJG1104KB2
Pin Connection
1.SOURCE
2.GND
3.RFout
4.GND
5.VCONT
6.RFin
ATT
AMP
1
2
3
6
5
4
KB2 Type
(Top View)
Note: The
portion above shows orientation mark printed on the package surface.
NJG1104KB2
- 2 -
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ABSOLUTE MAXIMUM RATINGS
( T
a
=25C, Z
s
=Z
l
=50
)
PARAMETER
SYMBOL
CONDITIONS
RATINGS
UNITS
Drain Voltage
V
DD
6.0
V
Gain Control Voltage
V
CONT
4.0
V
Input Power
P
in
V
DD
=2.8V
+20
dBm
Power Dissipation
P
D
450
mW
Operating Temperature
T
opr
-40~+85
C
Storage Temperature
T
stg
-55~+125
C
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ELECTRICAL CHARACTERISTICS
(V
DD
=2.8V, V
CONT
=1.7V, f=865MHz, T
a
=25C, Z
s
=Z
l
=50
)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Frequency
freq
830
865
900
MHz
Drain Voltage
V
DD
2.7
2.8
5.5
V
Gain Control Voltage
V
CONT
0.2
1.7
3.0
V
Operating Current
I
DD
No RF Signal
-
6.0
7.5
mA
Gain Control Terminal
Current
I
CONT
No RF Signal
-
1.0
5.0
uA
Small Signal Gain
Gain
13.0
15.0
17.0
dB
Gain Flatness
G
flat
f=830~900MHz
-
0.5
1.0
dB
Gain Control Range
G
CONT
V
CONT
=0.2V, 1.7V
18.5
20.5
22.5
dB
Noise Figure
NF
-
1.20
1.40
dB
Pout at 1dB Gain
Compression point
P
-1dB
-
+8.0
-
dBm
Output 3rd Order
Intercept Point
OIP3
f=865.0+865.1MHz
Pin=-30dBm
+19.0
+21.0
-
dBm
Input 3rd Order
Intercept Point 1
IIP3-1
f=865.0+865.1MHz
Pin=-30dBm
+4.0
+6.0
-
dBm
Input 3rd Order
Intercept Point 2
IIP3-2
f=865.0+865.1MHz
Pin=-10dBm
V
CONT
=0.2V
+21.0
+26.0
-
dBm
RF Input Port VSWR
VSWR
i
-
1.5
2.0
-
RF Output Port VSWR
VSWR
o
-
1.5
2.0
-
NJG1104KB2
- 3 -
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TERMINAL INFORMATION
Pin
Function
Description
1
SOURCE
This terminal is internally connected to FET's source of LNA. Please connect self-
bias resistor (R1) and bypass capacitor (C3) through source inductor (L5). NF and
IIP3 are tunable by C3 and L5.
2, 4
GND
Ground (0V) terminal. Ground plane should be placed as close to the ground
terminals. .
3
RFout
RF output and drain voltage supplies terminal. External matching circuit is
required.
5
VCONT Gain control voltage (V
CONT
) supplies terminal.
6
RFin
RF input terminal. External matching circuit and DC blocking capacitor are required.
NJG1104KB2
- 4 -
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TYPICAL CHARACTERISTICS
10
12
14
16
18
20
-10
-8
-6
-4
-2
0
700
750
800
850
900
950
1000
NF,Gain vs. frequency
(V
DD
=2.8V,V
CONT
=0.2V,I
DD
=6mA)
NF (dB)
Gain (dB)
frequency (MHz)
NF
Gain
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
10
11
12
13
14
15
16
17
18
700
750
800
850
900
950
1000
NF,Gain vs. frequency
(V
DD
=2.8V,V
CONT
=1.7V,I
DD
=6mA)
NF (dB)
Gain (dB)
frequency (MHz)
NF
Gain
-40
-30
-20
-10
0
10
-30
-20
-10
0
10
-25
-20
-15
-10
-5
0
Pout (dBm)
Pin (dBm)
Pout,Gain vs. Pin
(V
DD
=2.8V,V
CONT
=0.2V,f=865MHz)
Gain (dB)
Gain
Pout
-15
-10
-5
0
5
10
15
-40
-30
-20
-10
0
10
5
10
15
20
Pout (dBm)
Pin (dBm)
Pout,Gain vs. Pin
(V
DD
=2.8V,V
CONT
=1.7V,f=865MHz)
P-1dB=7.7dBm
Gain (dB)
Gain
Pout
NJG1104KB2
- 5 -
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TYPICAL CHARACTERISTICS
Equations of OIP3 and IIP3
2
3
IM
-
Pout
3
=
3
OIP
Gain
-
3
OIP
=
3
IIP
VCONT=1.7V@ Pin=-30dBm
VCONT=0.2V@ Pin=-10dBm
60
80
100
120
140
160
180
200
3
4
5
6
7
8
9
10
11
Rbias vs. IDD
Rbias (ohm)
IDD (mA)
(V
DD
=2.8V, V
CONT
=1.7V)
10
15
20
25
0
5
10
15
4
5
6
7
8
9
10
OIP3,IIP3 vs. IDD
OIP3 (dBm)
IIP3 (dBm)
IDD (mA)
(V
DD
=2.8V,V
CONT
=1.7V,f=865+865.1MHz,Pin=-30dBm)
IIP3
OIP3
10
15
20
25
5
10
15
20
0.0
0.5
1.0
1.5
2.0
OIP3,IIP3 vs. VCONT
OIP3 (dBm)
IIP3 (dBm)
VCONT (V)
(V
DD
=2.8V,I
DD
=6mA,f=865+865.1MHz,Pin=-30dBm)
IIP3
OIP3
0
5
10
15
20
25
30
-10
-5
0
5
10
15
20
0.0
0.5
1.0
1.5
2.0
NF,Gain vs. VCONT
(V
DD
=2.8V, f=865MHz)
NF (dB)
VCONT (V)
Gain (dB)
NF
Gain
0.0
0.5
1.0
1.5
2.0
12
13
14
15
16
4
5
6
7
8
9
10
NF,Gain vs. IDD
NF (dB)
Gain (dB)
IDD (mA)
(V
DD
=2.8V,V
CONT
=1.7V,f=865MHz)
NF
Gain
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