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High-Dynamic-Range, Direct Up-/Downconversion
1500MHz to 2500MHz Quadrature Mod/Demod
AC ELECTRICAL CHARACTERISTICS (Demodulator, LO = 1850MHz)
(MAX2023 Typical Application Circuit when operated as a demodulator, V CC = 4.75V to 5.25V, GND = 0V, V DC for BBI+, BBI-, BBQ+,
BBQ- = 0V, 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, P RF = 0dBm, f BB = 1MHz, P LO = 0dBm, f LO = 1850MHz, T C = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RF INPUT
Conversion Loss
Noise Figure
Noise Figure Underblocking
Conditions
Input Third-Order Intercept
Point
Input Second-Order Intercept
Point
Input 1dB Compression Point
I/Q Gain Mismatch
I/Q Phase Mismatch
f BB = 25MHz
f BLOCKER = 1950MHz, P BLOCKER = +11dBm,
f RF = 1850MHz (Note 10)
f RF1 = 1875MHz, f RF2 = 1876MHz, f LO = 1850MHz,
P RF = P LO = 0dBm, f IM3 = 24MHz
f RF1 = 1875MHz, f RF2 = 1876MHz, f LO = 1850MHz,
P RF = P LO = 0dBm, f IM2 = 51MHz
f BB = 25MHz
f BB = 1MHz
f BB = 1MHz
9.5
9.6
20.3
38
59
29.7
0.025
0.56
dB
dB
dB
dBm
dBm
dBm
dB
Degrees
AC ELECTRICAL CHARACTERISTICS (Demodulator, LO = 2350MHz)
(MAX2023 Typical Application Circuit when operated as a demodulator. I/Q outputs are recombined using network shown in
Figure 5. Losses of combining network not included in measurements. RF and LO ports are driven from 50 Ω sources. Typical values
are for T C = +25°C, V CC = 5V, I/Q DC returns = 160 Ω resistors to GND, P RF = 0dBm, P LO = 0dBm, f RF = 2140MHz, f LO = 2350MHz,
f IF = 210MHz, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Conversion Loss
Noise Figure
L C
NF SSB
10.9
11
dB
dB
f RF1 = 2135MHz,
f RF2 = 2140MHz,
Input Third-Order Intercept Point
IIP3
P RF1 = P RF2 = 0dBm,
31.5
dBm
f IF1 = 215MHz,
f IF2 = 210MHz
f RF1 = 2135MHz,
f RF2 = 2140MHz,
Input Second-Order Intercept
Point
IIP2
P RF1 = P RF2 = 0dBm,
f IF1 = 215MHz,
65
dBm
f IF2 = 210MHz,
f IM2nd = 425MHz
LO Leakage at RF Port
LO Leakage at I/Q Ports
-50
-38
dBm
dBm
Gain Compression
I/Q Gain Mismatch
I/Q Phase Mismatch
RF Port Return Loss
P RF = 21dBm
C9 = 2pF
0.17
0.025
0.6
13
dB
dB
Degrees
dB
4
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