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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.)
-5
MODULATOR OUTPUT POWER
vs. BASEBAND FREQUENCY
-40
MODULATOR LO LEAKAGE
vs. LO FREQUENCY
-40
MODULATOR LO LEAKAGE
vs. LO FREQUENCY
-6
-7
f LO + f BB
P I/Q-COMBINED = 0dBm
-50
P RF = -40dBm
P RF = +5dBm
-50
P RF = -1dBm,
LO LEAKAGE NULLED
AT T A = +25 ° C
-8
-60
-60
T C = -40°C
-9
-10
-11
-70
-70
-12
-80
P RF = -7dBm
-80
T C = +85°C
-13
-14
-15
f LO - f BB
-90
-100
P RF = -1dBm
LO LEAKAGE NULLED
AT P RF = -1dBm
-90
-100
T C = +25°C
0
10
20 30 40 50 60
70
1.80
1.82
1.84 1.86 1.88
1.90
1.80
1.82
1.84 1.86 1.88
1.90
BASEBAND FREQUENCY (MHz)
MODULATOR LO LEAKAGE
vs. LO FREQUENCY
LO FREQUENCY (GHz)
MODULATOR OUTPUT NOISE DENSITY
vs. OUTPUT POWER
LO FREQUENCY (GHz)
MODULATOR OUTPUT NOISE DENSITY
vs. OUTPUT POWER
-40
-50
-60
-70
-80
P LO = -3dBm
P RF = -1dBm,
LO LEAKAGE NULLED
AT P LO = 0dBm
-150
-155
-160
-165
-170
T C = +85°C
-150
-155
-160
-165
-170
P LO = -3dBm
P LO = 0dBm
P LO = +3dBm
P LO = +3dBm
-90
-175
-175
-100
P LO = 0dBm
-180
T C = -40°C
T C = +25°C
-180
1.80
1.82
1.84 1.86 1.88
1.90
-23
-18
-13 -8 -3 2
7
12
-23
-18
-13 -8 -3 2
7
12
12.0
LO FREQUENCY (GHz)
DEMODULATOR CONVERSION LOSS
vs. LO FREQUENCY
45
OUTPUT POWER (dBm)
DEMODULATOR INPUT IP3
vs. LO FREQUENCY
45
OUTPUT POWER (dBm)
DEMODULATOR INPUT IP3
vs. LO FREQUENCY
11.5
11.0
T C = +85°C
43
41
39
P LO = 0dBm
P LO = +3dBm
43
41
39
T C = +25°C
T C = +85°C
10.5
10.0
37
35
37
35
9.5
33
P LO = -3dBm
33
9.0
8.5
8.0
T C = +25°C
T C = -40°C
31
29
27
25
f 1 = f LO + 25MHz
f 2 = f LO + 26MHz
31
29
27
25
T C = -40°C
f 1 = f LO + 25MHz
f 2 = f LO + 26MHz
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
1.5
1.6
1.7 1.8 1.9 2.0 2.1
2.2
2.3
8
LO FREQUENCY (GHz)
LO FREQUENCY (GHz)
LO FREQUENCY (GHz)
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