Datasheet

MAX2023
High-Dynamic-Range, Direct Up-/Downconversion
1500MHz to 2500MHz Quadrature Mod/Demod
9
Typical Operating Characteristics (continued)
(MAX2023 Typical Application Circuit , V
CC
= 4.75V to 5.25V, GND = 0V, I/Q differential inputs driven from a 100Ω DC-coupled source
(modulator), V
BBI
= V
BBQ
= 2.6V
P-P
differential (modulator), P
RF
= +6dBm (demodulator), I/Q differential output drives 50Ω differential load
(demodulator), 0V common-mode input/output, P
LO
= 0dBm, 1500MHz ≤ f
LO
≤ 2300MHz, 50Ω LO and RF system impedance, R1 = 432Ω,
R2 = 562Ω, R3 = 301Ω, T
C
= -40°C to +85°C. Typical values are at V
CC
= 5V, f
LO
= 1850MHz, T
C
= +25°C, unless otherwise noted.)
DEMODULATOR INPUT IP2
vs. LO FREQUENCY
LO FREQUENCY (GHz)
INPUT IP2 (dBm)
MAX2023 toc25
1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3
50
55
60
65
70
75
80
T
C
= +85°C
T
C
= +25°C
T
C
= -40°C
f
1
= f
LO
+ 25MHz
f
2
= f
LO
+ 26MHz
DEMODULATOR I/Q PHASE IMBALANCE
vs. LO FREQUENCY
LO FREQUENCY (GHz)
I/Q PHASE IMBALANCE (deg)
MAX2023 toc26
1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3
0
1
2
3
4
5
6
P
LO
= -3dBm
P
LO
= 0dBm
P
LO
= +3dBm
P
LO
= -6dBm
DEMODULATOR I/Q AMPLITUDE IMBALANCE
vs. LO FREQUENCY
LO FREQUENCY (GHz)
I/Q AMPLITUDE IMBALANCE (dB)
MAX2023 toc27
1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
P
LO
= -3dBm
P
LO
= 0dBm
P
LO
= +3dBm
P
LO
= -6dBm
LO PORT RETURN LOSS
LO FREQUENCY (GHz)
RETURN LOSS (dB)
MAX2023 toc28
1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3
30
28
26
24
22
20
18
16
14
12
10
P
LO
= -3dBm
P
LO
= 0dBm
P
LO
= +3dBm
P
LO
= -6dBm
RF PORT RETURN LOSS
RF FREQUENCY (GHz)
RETURN LOSS (dB)
MAX2023 toc29
1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3
40
35
30
25
20
15
10
P
LO
= -6dBm, -3dBm, 0dBm, +3dBm