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High-Dynamic-Range, Direct Up-/Downconversion
1500MHz to 2500MHz Quadrature Mod/Demod
Typical Operating Characteristics (continued)
(MAX2023 Typical Application Circuit, V CC = 4.75V to 5.25V, GND = 0V, I/Q differential inputs driven from a 100 Ω DC-coupled source
(modulator), V BBI = V BBQ = 2.6V P-P differential (modulator), P RF = +6dBm (demodulator), I/Q differential output drives 50 Ω differential load
(demodulator), 0V common-mode input/output, P LO = 0dBm, 1500MHz ≤ f LO ≤ 2300MHz, 50 Ω LO and RF system impedance, R1 = 432 Ω ,
R2 = 562 Ω , R3 = 301 Ω , T C = -40°C to +85°C. Typical values are at V CC = 5V, f LO = 1850MHz, T C = +25°C, unless otherwise noted.)
MODULATOR OUTPUT IP3
vs. LO FREQUENCY
MODULATOR OUTPUT IP3
vs. I/Q COMMON-MODE VOLTAGE
MODULATOR OUTPUT IP2
vs. LO FREQUENCY
30
28
26
P LO = 0dBm
f 1 = 1.8MHz
f 2 = 1.9MHz
26.0
25.5
f 1 = 1.8MHz
f 2 = 1.9MHz
80
75
T C = +85 ° C
T C = +25°C
24
22
P LO = +3dBm
25.0
24.5
70
20
18
16
14
12
10
P LO = -3dBm
24.0
23.5
23.0
22.5
22.0
65
60
55
50
T C = -40°C
f 1 = 1.8MHz
f 2 = 1.9MHz
1.5
1.6
1.7 1.8 1.9 2.0 2.1
2.2
2.3
-3.5
-2.5 -1.5 -0.5 0.5 1.5 2.5
3.5
1.5
1.6
1.7 1.8 1.9 2.0 2.1
2.2
2.3
80
LO FREQUENCY (GHz)
MODULATOR OUTPUT IP2
vs. LO FREQUENCY
80
I/Q COMMON-MODE VOLTAGE (V)
MODULATOR OUTPUT IP2
vs. LO FREQUENCY
68
LO FREQUENCY (GHz)
MODULATOR OUTPUT IP2
vs. I/Q COMMON-MODE VOLTAGE
75
V CC = 5.25V
75
P LO = 0dBm
67
P LO = -3dBm
66
70
65
V CC = 5V
70
65
65
64
60
V CC = 4.75V
60
P LO = +3dBm
63
62
55
50
f 1 = 1.8MHz
f 2 = 1.9MHz
55
50
f 1 = 1.8MHz
f 2 = 1.9MHz
61
60
f 1 = 1.8MHz
f 2 = 1.9MHz
1.5
1.6
1.7 1.8 1.9 2.0 2.1
2.2
2.3
1.5
1.6
1.7 1.8 1.9 2.0 2.1
2.2
2.3
-3.5
-2.5 -1.5 -0.5 0.5 1.5 2.5
3.5
LO FREQUENCY (GHz)
MODULATOR OUTPUT POWER
vs. INPUT POWER
LO FREQUENCY (GHz)
MODULATOR OUTPUT POWER
vs. INPUT POWER
I/Q COMMON-MODE VOLTAGE (V)
MODULATOR OUTPUT POWER
vs. LO FREQUENCY
20
18
16
14
V CC = 4.75V, 5V, 5.25V
20
18
16
14
P LO = +3dBm
P LO = 0dBm
8
7
6
T C = -40°C
12
12
10
8
6
10
8
6
P LO = -3dBm
5
4
T C = +25°C
4
2
0
4
2
0
3
2
T C = +85°C
10 12 14 16 18 20 22 24 26 28 30
10 12 14 16 18 20 22 24 26 28 30
1.5
1.6
1.7 1.8 1.9 2.0 2.1
2.2
2.3
INPUT POWER (dBm)
INPUT POWER (dBm)
LO FREQUENCY (GHz)
7
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