Datasheet
MAX2021
High-Dynamic-Range, Direct Up-/Downconversion
650MHz to 1200MHz Quadrature Mod/Demod
8
Maxim Integrated
MODULATOR OUTPUT POWER
vs. INPUT POWER
MAX2021 toc19
INPUT POWER (dBm)
OUTPUT POWER (dBm)
1916 252213
10
5
0
15
20
-5
10 28
INPUT SPLIT BETWEEN I AND Q,
f
IF
= 25MHz, f
LO
= 900MHz
P
LO
= -6dBm, -3dBm, 0dBm, +3dBm
MODULATOR OUTPUT POWER
vs. LO FREQUENCY
MAX2021 toc20
LO FREQUENCY (MHz)
OUTPUT POWER (dBm)
975900 11251050825
1
-1
-3
3
5
-5
750 1200
T
C
= -40°C
T
C
= +85°C
T
C
= +25°C
V
BBI
= V
BBQ
= 1.4V
P-P
DIFFERENTIAL
LO LEAKAGE vs. LO FREQUENCY
MAX2021 toc21
LO FREQUENCY (MHz)
LO LEAKAGE (dBm)
959948937926
-90
-80
-70
-60
-50
-40
-100
915 970
P
RF
= -40dBm
P
RF
= -7dBm
P
RF
= -1dBm
LO LEAKAGE NULLED AT P
RF
= -1dBm
P
RF
= +5dBm
LO LEAKAGE vs. LO FREQUENCY
MAX2021 toc22
LO FREQUENCY (MHz)
LO LEAKAGE (dBm)
959948937926
-90
-80
-70
-60
-50
-40
-100
915 970
T
C
= -40°C
T
C
= +85°C
T
C
= +25°C
P
RF
= -1dBm, LO LEAKAGE NULLED AT T
C
= +25°C
LO LEAKAGE vs. LO FREQUENCY
MAX2021 toc23
LO FREQUENCY (MHz)
LO LEAKAGE (dBm)
959948937926
-90
-80
-70
-60
-50
-40
-100
915 970
P
LO
= -6dBm
P
LO
= +3dBm
P
LO
= -3dBm
P
LO
= 0dBm
P
RF
= -1dBm, LO LEAKAGE NULLED AT P
LO
= 0dBm
OUTPUT NOISE vs. OUTPUT POWER
MAX2021 toc24
OUTPUT POWER (dBm)
OUTPUT NOISE (dBm/Hz)
1050-5-10
-175
-170
-165
-160
-155
-150
-180
-15 15
T
C
= +25°C, f
LO
= 900MHz
P
LO
= -6dBm
P
LO
= -3dBm
P
LO
= 0dBm
P
LO
= +3dBm
OUTPUT NOISE vs. OUTPUT POWER
MAX2021 toc25
OUTPUT POWER (dBm)
OUTPUT NOISE (dBm/Hz)
1050-5-10
-175
-170
-165
-160
-155
-150
-180
-15 15
P
LO
= 0dBm, f
LO
= 900MHz
T
C
= +85°C
T
C
= -40°C
T
C
= +25°C
Typical Operating Characteristics (continued)
(MAX2021
Typical Application Circuit
, V
CC
= 4.75V to 5.25V, GND = 0V, I/Q differential inputs driven from a 100Ω DC-coupled source,
0V common-mode input, P
LO
= 0dBm, 750MHz ≤ f
LO
≤ 1200MHz, 50Ω LO and RF system impedance, R1 = 432Ω, R2 = 619Ω, R3 =
332Ω, T
C
= -40°C to +85°C. Typical values are at V
CC
= 5V, V
BBI
= 1.4V
P-P
differential, V
BBQ
= 1.4V
P-P
differential, f
IQ
= 1MHz,
f
LO
= 900MHz, T
C
= +25°C, unless otherwise noted.)
MODULATOR