Datasheet
MAX2023
High-Dynamic-Range, Direct Up-/Downconversion
1500MHz to 2500MHz Quadrature Mod/Demod
5
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Real 74.7
RF Port Impedance (R+jX)
(At RF Pin)
RF = 2140MHz,
C9 = short
Imag +j46.3
LO Port Return Loss C3 = 3pF 23 dB
Real 38.0
LO Port Impedance (R+jX)
(At LO Pin)
LO = 2350MHz,
C3 = short
Imag +j20.7
IF Port Differential Return Loss 27 dB
Real 53.2
IF Port Differential Impedance
(At IF Pins) (R+jX)
IF = 210MHz,
LO = 2350MHz
Imag -j2.8
Minimum Demodulation 3dB
Bandwidth
> 1000 MHz
Minimum 1dB Gain Flatness > 800 MHz
AC ELECTRICAL CHARACTERISTICS (Demodulator, LO = 2350MHz) (continued)
(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 50Ω sources. Typical values
are for T
C
= +25°C, V
CC
= 5V, I/Q DC returns = 160Ω resistors to GND, P
RF
= 0dBm, P
LO
= 0dBm, f
RF
= 2140MHz, f
LO
= 2350MHz,
f
IF
= 210MHz, unless otherwise noted.)
Note 5: Guaranteed by production test.
Note 6: Recommended functional range. Not production tested. Operation outside this range is possible, but with degraded
performance of some parameters.
Note 7: V
I/Q
= 2.66V
P-P
differential CW input.
Note 8: No baseband drive input. Measured with the baseband inputs terminated in 50Ω. At low output power levels, the output
noise density is equal to the thermal noise floor. See Output Noise Density vs. Output Power plots in
Typical Operating
Characteristics
.
Note 9: The output noise vs. P
OUT
curve has the slope of LO noise (Ln dBc/Hz) due to reciprocal mixing. Measured at 10MHz off-
set from carrier.
Note 10: The LO noise (L = 10
(Ln/10)
), determined from the modulator measurements can be used to deduce the noise figure
under-blocking at operating temperature (T
P
in Kelvin), f
BLOCK
= 1 + (L
CN
- 1) T
P
/ T
O
+ LP
BLOCK
/ (1000kT
O
), where
T
O
= 290K, P
BLOCK
in mW, k is Boltzmann’s constant = 1.381 x 10
(-23)
J/K, and L
CN
= 10
(L
C
/10)
, L
C
is the conversion loss.
Noise figure underblocking in dB is NF
BLOCK
= 10 x log (f
BLOCK
). Refer to
Application Note 3632
.