Datasheet

MAX2021
High-Dynamic-Range, Direct Up-/Downconversion
650MHz to 1200MHz Quadrature Mod/Demod
9
Maxim Integrated
DEMODULATOR CONVERSION LOSS
vs. LO FREQUENCY
MAX2021 toc26
LO FREQUENCY (MHz)
DEMODULATOR CONVERSION LOSS (dB)
975900 11251050825
10
9
8
11
12
7
750 1200
P
LO
= 0dBm, V
CC
= 5.0V
T
C
= +85°C
T
C
= +25°C
T
C
= -40°C
DEMODULATOR INPUT IP3
vs. LO FREQUENCY
MAX2021 toc27
LO FREQUENCY (MHz)
DEMODULATOR INPUT IP3 (dBm)
975900 11251050825
36
34
32
38
40
30
750 1200
P
LO
= 0dBm, T
C
= +25°C
V
CC
= 4.75V
V
CC
= 5.25V
V
CC
= 5.0V
DEMODULATOR INPUT IP3
vs. LO FREQUENCY
MAX2021 toc28
LO FREQUENCY (MHz)
DEMODULATOR INPUT IP3 (dBm)
975900 11251050825
36
34
32
38
40
30
750 1200
P
LO
= 0dBm, V
CC
= 5.0V
T
C
= +85°C
T
C
= +25°C
T
C
= -40°C
DEMODULATOR INPUT IP2
vs. LO FREQUENCY
MAX2021 toc29
LO FREQUENCY (MHz)
DEMODULATOR INPUT IP2 (dBm)
11251050975900825
60
70
80
90
50
750 1200
T
C
= -40°C
T
C
= +85°C
T
C
= +25°C
P
LO
= 0dBm, V
CC
= 5.0V
DEMODULATOR PHASE IMBALANCE
vs. LO FREQUENCY
MAX2021 toc30
DEMODULATOR PHASE IMBALANCE (deg)
-8
-6
-4
-2
0
2
4
6
8
10
-10
LO FREQUENCY (MHz)
11251050975900825750 1200
P
LO
= -3dBm
P
LO
= 0dBm
P
LO
= +3dBm
P
LO
= -6dBm
MAX2021 toc31
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
-0.20
DEMODULATOR AMPLITUDE IMBALANCE
vs. LO FREQUENCY
DEMODULATOR AMPLITUDE IMBALANCE (dB)
LO FREQUENCY (MHz)
11251050975900825750 1200
P
LO
= -6dBm, -3dBm, 0dBm, +3dBm
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, 50Ω LO and RF sys-
tem impedance, R1 = 432Ω, R2 = 619Ω, R3 = 332Ω, T
C
= -40°C to +85°C. Typical values are at V
CC
= 5V, f
LO
= 900MHz, T
C
= +25°C,
unless otherwise noted.)
LO PORT RETURN LOSS
vs. LO FREQUENCY
MAX2021 toc32
LO FREQUENCY (MHz)
LO PORT RETURN LOSS (dB)
975900 11251050825
+10
+15
+20
+5
0
+25
750 1200
P
LO
= -6dBm, -3dBm
P
LO
= +3dBm
P
LO
= 0dBm
RF PORT RETURN LOSS
vs. LO FREQUENCY
MAX2021 toc33
LO FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
11301035940845
+40
+35
+30
+25
+20
+15
+10
+5
0
+45
750 1225
P
LO
= -6dBm, -3dBm, 0dBm, +3dBm
IF FLATNESS
vs. BASEBAND FREQUENCY
MAX2021 toc34
BASEBAND FREQUENCY (MHz)
IF OUTPUT POWER (dBm)
706010 20 30 40 50
-11
-10
-9
-8
-7
-6
-5
-4
-12
080
f
LO
= 1000MHz
f
LO
= 900MHz
P
LO
= 0dBm
DEMODULATOR (VARIABLE LO)