NJG1104KB2
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800MHz BAND LNA GaAs MMIC
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GENERAL DESCRIPTION nPACKAGE 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
lLow voltage operation +2.8V typ.
lLow current consumption 6.0mA typ.
lHigh gain 15dB typ. @f=865MHz
lLow noise figure 1.2dB typ. @f=865MHz
lVariable gain control 21dB typ. @f=865MHz,VCONT=0.2 to 1.7V
lHigh input IP3 +6dBm typ. @f=865.0+865.1MHz, Pin=-30dBm
lHigh output IP3 +21dBm typ. @f=865.0+865.1MHz, Pin=-30dBm
lUltra 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
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ABSOLUTE MAXIMUM RATINGS ( Ta=25°C, Zs=Zl=50Ω )
PARAMETER SYMBOL CONDITIONS RATINGS UNITS
Drain Voltage VDD 6.0 V
Gain Control Voltage VCONT 4.0 V
Input Power Pin VDD=2.8V +20 dBm
Power Dissipation PD450 mW
Operating Temperature Topr -40~+85 °C
Storage Temperature Tstg -55~+125 °C
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ELECTRICAL CHARACTERISTICS (VDD =2.8V, VCONT=1.7V, f=865MHz, Ta=25°C, Zs=Zl=50Ω )
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Frequency freq 830 865 900 MHz
Drain Voltage VDD 2.72.8 5.5V
Gain Control Voltage VCONT 0.2 1.7 3.0 V
Operating Current IDD No RF Signal -6.0 7.5 mA
Gain Control Terminal
Current ICONT No RF Signal -1.0 5.0 uA
Small Signal Gain Gain 13.0 15.0 17.0 dB
Gain Flatness Gflat f=830~900MHz -0.5 1.0 dB
Gain Control Range GCONT VCONT=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
VCONT =0.2V +21.0 +26.0 -dBm
RF Input Port VSWR VSWRi-1.5 2.0 -
RF Output Port VSWR VSWRo-1.5 2.0 -
NJG1104KB2
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TERMINAL INFORMATION
Pin Function Description
1SOURCE 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. .
3RFout RF output and drain voltage supplies terminal. External matching circuit is
required.
5VCONT Gain control voltage (VCONT) supplies terminal.
6RFin RF input terminal. External matching circuit and DC blocking capacitor are required.
NJG1104KB2
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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
(VDD=2.8V,VCONT=0.2V,IDD=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
(VDD=2.8V,VCONT=1.7V,IDD=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
(VDD=2.8V,VCONT=0.2V,f=865MHz)
Gain (dB)
Gain
Pout
-15
-10
-5
0
5
10
15
-40 -30 -20 -10 0 105
10
15
20
Pout (dBm)
Pin (dBm)
Pout,Gain vs. Pin
(VDD=2.8V,VCONT=1.7V,f=865MHz)
P-1dB=7.7dBm
Gain (dB)
Gain
Pout
NJG1104KB2
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TYPICAL CHARACTERISTICS
Equations of OIP3 and IIP3
23IM-Pout×3
=3OIP
Gain-3OIP=3IIP
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)
(VDD=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)
(VDD=2.8V,VCONT=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)
(VDD=2.8V,IDD=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
(VDD=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)
(VDD=2.8V,VCONT=1.7V,f=865MHz)
NF
Gain
NJG1104KB2
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TYPICAL CHARACTERISTICS
Equations of OIP3 and IIP3
23IM-Pout×3
=3OIP
Gain-3OIP=3IIP
VCONT=1.7V@ Pin=-30dBm
VCONT=0.2V@ Pin=-10dBm
6.0
6.2
6.4
6.6
6.8
7.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
IDD vs. VDD
IDD (mA)
VDD
(VCONT=1.7V)
1.0
1.2
1.4
1.6
1.8
2.0
10
12
14
16
18
20
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
NF,Gain vs. VDD
NF (dB)
Gain (dB)
VDD (V)
(VCONT=1.7V,f=865MHz)
NF
Gain
5
6
7
8
9
10
-50 0 50 100
IDD vs. Ta
IDD (mA)
Ta (oC)
(VDD=2.8V,VCONT=1.7V)
10
15
20
25
0
5
10
15
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
OIP3,IIP3 vs. VDD
OIP3 (dBm)
IIp3 (dBm)
VDD (V)
(VCONT=1.7V,f=865+865.1MHz,Pin=-30dBm)
IIP3
OIP3
18
19
20
21
22
23
5
6
7
8
9
10
820 840 860 880 900 920
OIP3,IIP3 vs. frequency
OIP3 (dBm)
IIP3 (dBm)
frequency (MHz)
(VDD=2.8V,VCONT=1.7V,f1=freq,f2=freq+100kHz,Pin=-30dBm)
IIP3
OIP3
NJG1104KB2
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TYPICAL CHARACTERISTICS
-10
-5
0
5
10
15
20
-50 0 50 100
Gain vs. Ta (Variable VCONT)
Gain (dB)
Ta (oC)
VCONT=1.4V
VCONT=1.2V
VCONT=1.1V VCONT=1.0V
VCONT=0.9V
VCONT=0.8V
VCONT=0.6V
VCONT=0.4V
VCONT=0.2V
VCONT=1.3V
Delta Gain(max)=1.3dB@Ta=-40to80 oC,VCONT=1.3V
VCONT=0V
(VDD=2.8V,freq=865MHz)
10
12
14
16
18
20
-10
-8
-6
-4
-2
0
-50 0 50 100
NF,Gain vs. Ta
NF (dB)
Gain (dB)
Ta (oC)
Gain
NF
(VDD=2.8V,VCONT=0.2V,freq=865MHz)
0
1
2
3
4
5
10
12
14
16
18
20
-50 0 50 100
NF,Gain vs. Ta
NF (dB)
Gain (dB)
Ta (oC)
(VDD=2.8V,VCONT=1.7V,freq=865MHz)
Gain
NF
20
22
24
26
28
30
0
2
4
6
8
10
-50 0 50 100
OIP3,IIP3 vs. Ta
OIP3 (dBm)
IIP3 (dBm)
Ta (oC)
(VDD=2.8V,VCONT=1.7V,freq=865+865.1MHz,Pin=-30dBm)
IIP3
OIP3
16
18
20
22
24
26
18
20
22
24
26
28
-50 0 50 100
OIP3,IIP3 vs. Ta
OIP3 (dBm)
IIP3 (dBm)
Ta (oC)
IIP3
OIP3
(VDD=2.8V,VCONT=0.2V,freq=865+865.1MHz,Pin=-10dBm)
NJG1104KB2
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TYPICAL CHARACTERISTICS
-20
-15
-10
-5
0
0 5 10 15 20
S11,S22 (dB)
S11,S22 vs. frequency
(VDD=2.8V,VCONT=0.2V,IDD=6mA)
frequency (GHz)
S11
S22
-20
-15
-10
-5
0
0 5 10 15 20
S11,S22 (dB)
S11,S22 vs. frequency
(VDD=2.8V,VCONT=1.7V,IDD=6mA)
frequency (GHz)
S11 S22
-70
-60
-50
-40
-30
-20
-10
0
0 5 10 15 20-60
-50
-40
-30
-20
-10
0
10
S21 (dB)
S21,S12 vs. frequency
(VDD=2.8V,VCONT=0.2V,IDD=6mA)
frequency (GHz)
S12 (dB)
S21
S12
-30
-20
-10
0
10
20
0 5 10 15 20-30
-20
-10
0
10
20
S21 (dB)
S21,S12 vs. frequency
(VDD=2.8V,VCONT=1.7V,IDD=6mA)
frequency (GHz)
S12 (dB)
S21
S12
-20
-15
-10
-5
0
-60
-50
-40
-30
-20
-10
0
10
20
0500 1000 1500 2000
S11,S22,S21 (dB)
S12 (dB)
S11,S21,S12,S22 vs. frequency
(VDD=2.8V,VCONT=0.2V,IDD=6mA)
frequency (MHz)
S12
S22
S21
S11
-40
-30
-20
-10
0
10
20
-30
-20
-10
0
10
20
30
0500 1000 1500 2000
S11,S22,S21 (dB)
S12 (dB)
S11,S21,S12,S22 vs. frequency
(VDD=2.8V,VCONT=1.7V,IDD=6mA)
frequency (MHz)
S21
S12
S11
S22
NJG1104KB2
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TYPICAL CHARACTERISTICS
Scattering Parameter Table at Maximum Gain
VDD=2.8V, VCONT=1.7V, IDD=6.1mA, Zo=50Ω
S11 S21 S12 S22
Freq
(MHz)mag
(units)ang
(deg) mag
(units) ang
(deg) mag
(units) ang
(deg) mag
(units) ang
(deg)
100 0.990 -3.7 2.893 -162.9 0.011 94.9 0.795 -9.3
200 0.983 -7.0 3.258 171.6 0.008 56.3 0.725 -7.2
300 0.967 -9.9 3.125 154.6 0.011 85.4 0.744 -5.8
400 0.946 -12.5 2.910 141.2 0.014 84.2 0.770 -6.8
500 0.927 -14.8 2.648 130.2 0.020 87.7 0.792 -8.8
600 0.909 -16.8 2.407 120.6 0.025 87.5 0.819 -11.5
700 0.896 -18.5 2.182 112.6 0.029 84.5 0.835 -14.5
800 0.884 -19.9 1.975 105.2 0.034 81.0 0.849 -17.6
900 0.876 -21.3 1.790 98.9 0.039 78.6 0.864 -20.8
1000 0.871 -22.7 1.624 92.9 0.044 77.3 0.874 -24.0
1100 0.867 -24.1 1.480 87.4 0.048 73.1 0.880 -27.2
1200 0.864 -25.3 1.349 82.2 0.054 71.6 0.884 -30.5
1300 0.860 -26.8 1.234 77.4 0.059 68.3 0.891 -33.8
1400 0.861 -28.1 1.129 72.7 0.063 66.2 0.897 -37.1
1500 0.862 -29.7 1.029 68.2 0.068 63.8 0.903 -40.4
1600 0.862 -31.3 0.942 63.8 0.072 61.0 0.907 -43.8
1700 0.863 -33.0 0.860 59.4 0.078 57.7 0.912 -47.4
1800 0.867 -34.7 0.783 55.2 0.083 55.4 0.916 -50.6
1900 0.869 -36.5 0.713 51.1 0.087 52.4 0.920 -54.0
2000 0.874 -38.4 0.650 47.3 0.091 50.5 0.921 -57.6
Note
VDD (=2.8V) is supplied through “BIAS CONNECT (PORT2)” of Network Analyzer.
Network Analyzer
Port11000p
VCONT=1.7VGND
ATT
AMP
1000p
GND
5.6n
120
1
2
3
6
5
4
RFout
SOURCE
RFin
Vcont
Reference Plane
Network Analyzer
Port2
Reference Plane
NJG1104KB2
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TYPICAL CHARACTERISTICS
Scattering Parameter Table at Minimum Gain
VDD=2.8V, VCONT=0.2V, IDD=6.1mA, Zo=50Ω
S11 S21 S12 S22
Freq
(MHz)mag
(units)ang
(deg) mag
(units) ang
(deg) mag
(units) ang
(deg) mag
(units) ang
(deg)
100 0.771 -62.4 2.226 171.8 0.002 -94.5 0.784 -9.3
200 0.573 -99.1 1.803 141.7 0.004 25.2 0.728 -6.5
300 0.480 -121.8 1.405 128.1 0.005 37.2 0.744 -4.9
400 0.430 -138.2 1.151 119.5 0.003 70.3 0.774 -5.6
500 0.405 -150.1 0.975 113.2 0.007 67.3 0.801 -7.5
600 0.391 -159.8 0.849 107.8 0.007 67.3 0.829 -10.2
700 0.381 -167.4 0.749 103.2 0.009 76.9 0.850 -13.2
800 0.373 -174.5 0.666 99.0 0.010 70.2 0.867 -16.4
900 0.369 179.3 0.597 95.3 0.013 75.7 0.884 -19.8
1000 0.366 173.4 0.538 91.7 0.014 73.3 0.897 -23.1
1100 0.365 168.5 0.489 88.4 0.015 74.7 0.905 -26.4
1200 0.365 163.1 0.443 84.9 0.017 73.9 0.910 -29.8
1300 0.367 158.7 0.406 81.9 0.019 70.8 0.918 -33.2
1400 0.369 154.2 0.371 78.8 0.020 68.7 0.923 -36.7
1500 0.372 150.2 0.338 76.0 0.021 65.2 0.930 -40.0
1600 0.374 146.3 0.310 73.1 0.023 63.8 0.932 -43.4
1700 0.378 142.6 0.283 70.6 0.024 64.2 0.938 -47.0
1800 0.384 139.1 0.257 67.8 0.026 63.6 0.942 -50.4
1900 0.388 136.5 0.232 64.7 0.027 60.2 0.944 -53.9
2000 0.388 133.1 0.211 62.7 0.029 59.5 0.947 -57.6
Note
VDD (=2.8V) is supplied through “BIAS CONNECT (PORT2)” of Network Analyzer.
Network Analyzer
Port11000p
VCONT=0.2VGND
ATT
AMP
1000p
GND
5.6n
120
1
2
3
6
5
4
RFout
SOURCE
RFin
Vcont
Reference Plane
Reference Plane
Network Analyzer
Port2
NJG1104KB2
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RECOMMENDED CIRCUIT
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RECOMMENDED PCB DESIGN
Parts List (f=830~900MHz)
PARTS ID Constant Comment
L1 22nH TAIYO-YUDEN HK1005 Series
L2 22nH TAIYO-YUDEN HK1608 Series
L3 22nH TAIYO-YUDEN HK1005 Series
L4 15nH TAIYO-YUDEN HK1005 Series
L5 5.6nH TAIYO-YUDEN HK1005 Series
C1, C4, C5 1000pF MURATA GRM36 Series
C2 6pF MURATA GRM36 Series
C3 100pF MURATA GRM36 Series
R1 120Ω-
PCB: FR4 t=0.2mm
MICROSTRIP LINE WIDTH=0.4mm(Zo=50Ω)
PCB SIZE: 20.0x20.0mm
RF Input
RF Output
L1 L2
C1 L5
R1
C3
L3
L4
C5
C4
V
CONT
V
DD
C2
PRECAUTIONS
1) The inductor of 1608 size is
recommended for NF
characteristics.
2) The value of C3 is selected
to get lower gain and higher
output IP3.
RF Output
RF InputC3
VCONT=0.2V to 1.7VGND VDD=2.8V
ATT
AMP
C1L2
L1
L3
L4
C2
C4
C5
GND
L5
R1
1
2
3
6
5
4
RFout
SOURCE
RFin
Vcont
NJG1104KB2
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PACKAGE OUTLINE (FLP6-B2)
Lead material : Copper
Lead surface finish: Solder plating
Molding material : Epoxy resin
UNIT : mm
Weight : 6.5mg
Cautions on using this product
This product contains Gallium-Arsenide (GaAs) which is a harmful material.
• Do NOT eat or put into mouth.
• Do NOT dispose in fire or break up this product.
• Do NOT chemically make gas or powder with this product.
• To waste this product, please obey the relating law of your country.
This product may be damaged with electric static discharge (ESD) or spike voltage. Please handle
with care to avoid these damages.
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
2.0±0.1
654
123
0.20.2
2.1±0.1
1.7±0.1
0.65 0.65
0.75±0.05 +0.1
0.2-0.05
+0.1
0.1 0.1
0.15-0.05
