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Low-Cost RF Up/Downconverter
with LNA and PA Driver
_____________________________Typical Operating Characteristics (continued)
(MAX2411A EV kit, V CC = +3.0V, V GC = +2.15V, RXEN = TXEN = low, all measurements performed in 50 ? environment, f LO = 1.5GHz,
P LO = -10dBm, f LNAIN = f PADRIN = f RXMXIN = 1.9GHz, P LNAIN = -32dBm, P PADRIN = P RXMXIN = -22dBm, f IF, IF = 400MHz,
P IF = -32dBm (Note 1), all impedance measurements made directly to pin (no matching network), T A = +25°C, unless otherwise noted.)
LNA OUTPUT 1dB COMPRESSION POINT
PA DRIVER INPUT IMPEDANCE
LNA NOISE FIGURE vs. FREQUENCY
vs. SUPPLY VOLTAGE
vs. FREQUENCY
5.0
0
160
MAX2411A-12
70
4.5
4.0
3.5
3.0
RXEN = V CC
-1
-2
RXEN = V CC
140
120
100
TXEN = V CC
IMAGINARY
30
-10
-50
2.5
2.0
1.5
-3
-4
80
60
-90
-130
1.0
0.5
0.0
-5
-6
40
20
0
REAL
-170
-210
-250
100
480
860
1240
1620
2000
2.7
3.2
3.7
4.2
4.7
5.2
0
0.5
1.0
1.5
2.0
2.5
3.0
FREQUENCY (MHz)
PA DRIVER OUTPUT IMPEDANCE
vs. FREQUENCY
SUPPLY VOLTAGE (V)
PA DRIVER GAIN vs. FREQUENCY
FREQUENCY (GHz)
PA DRIVER GAIN AND OUTPUT IP3
vs. GC VOLTAGE
200
175
150
125
TXEN = V CC
IMAGINARY
MAX2411A-13
50
0
-50
-100
30
25
20
USING EV KIT
MATCHING NETWORK
(OPTIMIZED FOR 1.9GHz)
TXEN = V CC
20
15
10
5
0
TXEN = V CC
IP3
100
75
-150
-200
15
10
-5
-10
-15
GAIN
50
25
0
REAL
-250
-300
-350
5
0
-20
-25
-30
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2
21
FREQUENCY (GHz)
PA DRIVER OUTPUT IP3
vs. TEMPERATURE
TXEN = V CC
18
FREQUENCY (GHz)
PA DRIVER GAIN vs. TEMPERATURE
TXEN = V CC
8
GC VOLTAGE (V)
PA DRIVER OUTPUT 1dB COMPRESSION
vs. SUPPLY VOLTAGE
20
19
V CC = 5.5V
17
16
V CC = 5.5V
6
4
V GC = 2.15 V
18
V CC = 4.0V
15
V CC = 4.0V
2
TXEN = V CC
17
16
15
V CC = 3.0V
V CC = 2.7V
14
13
V CC = 2.7V
V CC = 3.0V
0
-2
V GC = 1.0V
14
12
-4
-40
-20
0
20
40
60
80
100
-40
-15
10
35
60
85
2.7
3.2
3.7
4.2
4.7
5.2
5.7
TEMPERATURE (°C)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
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