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MAX2021
High-Dynamic-Range, Direct Up-/Downconversion
650MHz to 1200MHz Quadrature Mod/Demod
Typical Operating Characteristics
(MAX2021 Typical Application Circuit, V CC = 4.75V to 5.25V, GND = 0V, I/Q outputs are recombined using network shown in Figure 5.
Losses of combining network not included in measurements. P RF = 5dBm, P LO = 0dBm, 750MHz ≤ f LO ≤ 1200MHz, 50 ? LO and RF sys-
tem impedance, R1 = 432 ? , R2 = 619 ? , R3 = 332 ? , T C = -40°C to +85°C. Typical values are at V CC = 5V, f LO = 900MHz, T C = +25°C,
unless otherwise noted.)
DEMODULATOR (VARIABLE LO)
DEMODULATOR CONVERSION LOSS
vs. LO FREQUENCY
DEMODULATOR INPUT IP3
vs. LO FREQUENCY
DEMODULATOR INPUT IP3
vs. LO FREQUENCY
12
P LO = 0dBm, V CC = 5.0V
40
P LO = 0dBm, T C = +25 ° C
40
P LO = 0dBm, V CC = 5.0V
11
T C = +85 ° C
T C = +25 ° C
38
V CC = 5.25V
38
T C = -40 ° C
T C = +25 ° C
10
36
36
9
34
V CC = 5.0V
34
8
T C = -40 ° C
32
V CC = 4.75V
32
T C = +85 ° C
7
30
30
750
825
900
975
1050
1125
1200
750
825
900
975
1050
1125
1200
750
825
900
975
1050
1125
1200
LO FREQUENCY (MHz)
DEMODULATOR INPUT IP2
vs. LO FREQUENCY
LO FREQUENCY (MHz)
DEMODULATOR PHASE IMBALANCE
vs. LO FREQUENCY
LO FREQUENCY (MHz)
DEMODULATOR AMPLITUDE IMBALANCE
vs. LO FREQUENCY
90
P LO = 0dBm, V CC = 5.0V
10
8
P LO = +3dBm
0.20
0.15
80
T C = +25 ° C
6
4
2
P LO = -3dBm
P LO = 0dBm
0.10
0.05
70
0
0
T C = +85 ° C
-2
-0.05
P LO = -6dBm, -3dBm, 0dBm, +3dBm
60
T C = -40 ° C
-4
-6
P LO = -6dBm
-0.10
-8
-0.15
50
-10
-0.20
750
825
900
975
1050
1125
1200
750
825
900
975
1050
1125
1200
750
825
900 975 1050 1125
1200
LO FREQUENCY (MHz)
LO PORT RETURN LOSS
vs. LO FREQUENCY
LO FREQUENCY (MHz)
RF PORT RETURN LOSS
vs. LO FREQUENCY
LO FREQUENCY (MHz)
IF FLATNESS
vs. BASEBAND FREQUENCY
0
P LO = +3dBm
0
+5
-4
-5
P LO = 0dBm
+5
+10
P LO = 0dBm
+10
+15
+20
-6
-7
-8
f LO = 900MHz
+15
+20
P LO = -6dBm, -3dBm
+25
+30
+35
P LO = -6dBm, -3dBm, 0dBm, +3dBm
-9
-10
f LO = 1000MHz
+40
-11
+25
+45
-12
750
825
900
975
1050
1125
1200
750
845
940
1035
1130
1225
0
10
20
30
40
50
60
70
80
Maxim Integrated
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
BASEBAND FREQUENCY (MHz)
9
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