NJG1144UX2
GNSS LOW NOISE AMPLIFIER GaAs MMIC
I
GENERAL DESCRIPTION
The NJG1144UX2 is a low noise amplifier GaAs MMIC designed
for GPS, GALILEO, and GLONASS. The NJG1144UX2 operates
from 1.5V to 3.6V supply voltage. The NJG1144UX2 achieves high
gain, low noise figure and excellent input VSWR. According to
adjust the external components, the NJG1144UX2 could also be
used in wide frequency range from 1.0GHz to 3.0GHz. The
NJG1144UX2 is available in a very small, RoHS compliant,
Halogen Free, 0.65mm x 0.65mm x 0.37 mm, 4-pin EPFFP4-X2
package.
I
FEATURES
G
Low voltage operation
G
Low current consumption
G
G
G
G
G
G
I
PACKAGE OUTLINE
NJG1144UX2
Low noise figure
High gain
High input IP3
Package
Built-in ESD Protection Diode
RoHS compliant, Pb free, Halogen free
1.5~3.6V
3.5mA@ V
DD
=2.85V
1.8mA@ V
DD
=1.8V
0.65dB@ f=1575MHz, V
DD
=2.85V
21.0dB@ f=1575MHz, V
DD
=2.85V
-2.0dBm@ f=1575MHz, V
DD
=2.85V
EPFFP4-X2 (Package size: 0.65mm x 0.65mm x 0.37mm typ.)
I
PIN CONFIGURATION
(Top View)
RFIN
GND
4
3
Pin Connection
1. GND
2. RFOUT
3. GND
4. RFIN
GND
RFOUT
1
2
1Pin INDEX
Note: Specifications and description listed in this datasheet are subject to change without notice
Ver.2012-02-10
-1-
NJG1144UX2
I
ABSOLUTE MAXIMUM RATINGS
T
a
=+25°C, Z
s
=Z
l
=50 ohm
PARAMETER
Supply voltage
Input power
Power dissipation
Operating temperature
Storage temperature
SYMBOL
V
DD
P
IN
P
D
T
opr
T
stg
V
DD
=2.85V
4-layer FR4 PCB with through-hole
(101.5x114.5mm), T
j
=150°C
CONDITIONS
RATINGS
5.0
+15
250
-40~+85
-55~+150
UNITS
V
dBm
mW
°C
°C
I
ELECTRICAL CHARACTERISTICS 1
(DC CHARACTERISTICS)
T
a
=+25°C
PARAMETERS
Operating voltage
Operating current1
Operating current2
SYMBOL
V
DD
I
DD
1
I
DD
2
RF OFF, V
DD
=2.85V
RF OFF, V
DD
=1.8V
CONDITIONS
MIN
1.5
-
-
TYP
-
3.5
1.8
MAX
3.6
5.5
3.2
UNITS
V
mA
mA
-2-
NJG1144UX2
I
ELECTRICAL CHARACTERISTICS 2
(RF CHARACTERISTICS)
V
DD
=2.85V, freq=1575MHz, T
a
=+25°C, Z
S
=Z
l
=50 ohm, with application circuit
PARAMETERS
Small signal gain1
Noise figure1
Input power 1dB
gain compression1
Input 3rd order
intercept point1
Isolation1
RF IN VSWR1
RF OUT VSWR1
SYMBOL
Gain1
NF1
P
-1dB(IN)
1
IIP3_1
ISL1
VSWRi1
VSWRo1
f1=freq, f2=freq+100kHz,
P
IN
=-34dBm
S12
Exclude PCB,
Connector Losses (0.08dB)
CONDITIONS
MIN
18.0
-
-19.0
-5.0
-
-
-
TYP
21.0
0.65
-16.5
-2.0
-35.0
1.5
1.5
MAX
23.5
0.95
-
-
-25.0
2.0
2.2
UNITS
dB
dB
dBm
dBm
dB
-
-
I
ELECTRICAL CHARACTERISTICS 3
(RF CHARACTERISTICS)
V
DD
=1.8V, freq=1575MHz, T
a
=+25°C, Z
S
=Z
l
=50 ohm, with application circuit
PARAMETERS
Small signal gain2
Noise figure2
Input power 1dB
gain compression2
Input 3rd order
intercept point2
Isolation2
RF IN VSWR2
RF OUT VSWR2
SYMBOL
Gain2
NF2
P
-1dB(IN)
2
IIP3_2
ISL2
VSWRi2
VSWRo2
f1=freq, f2=freq+100kHz,
P
IN
=-34dBm
S12
Exclude PCB,
Connector Losses (0.08dB)
CONDITIONS
MIN
16.0
-
-22.0
-11.0
-
-
-
TYP
18.0
0.85
-18.5
-6.0
-35.0
1.8
1.8
MAX
21.5
1.30
-
-
-25.0
2.4
2.6
UNITS
dB
dB
dBm
dBm
dB
-
-
-3-
NJG1144UX2
I
TERMINAL INFORMATION
No.
SYMBOL
DESCRIPTION
1
GND
Ground terminal (0V), Connect to the PCB ground plane.
2
RFOUT
RF output and voltage supply terminal. An external output matching
circuit is required.
3
GND
Ground terminal (0V), Connect to the PCB ground plane.
4
RFIN
RF input terminal. DC blocking capacitor is not required. An external
input matching circuit is required.
-4-
NJG1144UX2
I
ELECTRICAL CHARACTERISTICS
Conditions: V
DD
=2.85V, Ta=25°C, Z
s
=Z
l
=50 ohm, with application circuit
Pout vs. Pin
(V
DD
=2.85V, fRF=1575MHz)
20
15
10
24
Gain, I
DD
vs. Pin
(V
DD
=2.85V, fRF=1575MHz)
10
Gain
22
20
9
8
7
6
5
Pout (dBm)
Gain (dB)
0
-5
-10
-15
Pout
16
14
12
10
I
DD
4
3
P-1dB(IN)=-16.5dBm
-20
-40
-30
-20
-10
0
10
8
-40
P-1dB(IN)=-16.5dBm
2
-30
-20
-10
0
10
Pin (dBm)
Pin (dBm)
Pout, IM3 vs. Pin
(V
DD
=2.85V, f1=1575MHz, f2=f1+100kHz)
60
40
20
OIP3, IIP3 vs. frequency
(V
DD=
2.85V, f1=1550~1600MHz, f2=f1+100kHz, Pin=-34dBm)
8
24
22
20
6
OIP3
4
2
0
Pout , IM3 (dBm)
OIP3 (dBm)
0
-20
-40
18
16
14
12
10
IIP3
-2
-4
-6
-8
1600
IM3
-60
-80
IIP3=-2.3dBm
-100
-40
-30
-20
-10
0
10
8
1550
1560
1570
1580
1590
Pin (dBm)
frequency (MHz)
NF, Gain vs. frequency
(V
DD
=2.85V, f=1.5~1.65GHz)
3.0
26
2.5
24
Noise Figure (dB)
Gain
2.0
22
1.5
20
1.0
NF
18
0.5
(NF: Exclude PCB, Connector Losses)
0.0
1.50
1.55
1.60
16
14
1.65
frequency (GHz)
Gain (dB)
IIP3 (dBm)
Pout
I
DD
(mA)
5
18
-5-
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