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SX1701B
ADVANCED COMMUNICATION & SENSING PRODUCTS
3.3 TYPICAL OPERATING CHARACTERISTICS
The curves below give the typical RF performances of the LNA under the following conditions:
Datasheet
VDD = 5.0 V, Temperature = 25 °C, Z Source = 75 , Z Load = 100
differential, Frequency range = 40 MHz to 2.5 GHz,
input matching network according to application schematics of figure 4.
Gain
Input and Output Return Loss (Gain = 18dB)
20
15
10
G=18dB
G=12dB
G = 6dB
0
-10
-20
IRL
0
-10
-20
5
0
-30
-40
ORL
-30
-40
0
0.5
1
1.5
2
2.5
0
0.5
1
1.5
2
2.5
Noise Figure
Frequency (GHz)
Frequency (GHz)
Output IP2 & IP3 (Gain = 18dB)
14
13
80
f2 = f1 + 0.1 GHz
40
12
11
10
9
G = 6dB
G=12dB
70
60
OIP3
30
20
8
G=18dB
50
OIP2
10
7
6
40
0
0
0.5
1
1.5
2
2.5
0
0.5
1
1.5
2
2.5
Gain Compression
20
G=18dB
Frequency (GHz)
f1 (GHz)
Common Mode Rejection
50
15
40
G=18dB
10
G=12dB
30
5
G=6dB
20
10
G=12dB
G=6dB
0
0
-15
-10
-5
0
5
0
0.5
1
1.5
2
2.5
Input power (dBm)
Figure 2. Typical Operating Characteristics Curves.
Frequency (GHz)
V1.11_STD – August 26 , 2008
th
7/13
www.semtech.com
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