MAX2021_13 Datasheet, PDF (5/20 Pages) Maxim Integrated Products – High-Dynamic-Range, Direct Up-/Downconversion 650MHz to 1200MHz Quadrature Mod/Demod

MAX2021
High-Dynamic-Range, Direct Up-/Downconversion
650MHz to 1200MHz Quadrature Mod/Demod
AC ELECTRICAL CHARACTERISTICS (Demodulator LO = 965MHz) (continued)
(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_A = +25°C,
V_CC = 5.0V, I/Q DC voltage return = 0V, P_RF = 0dBm, P_LO = 0dBm, f_RF = 780MHz, f_LO = 965MHz, f_IF = 185MHz, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Second-Order Intercept
Point
f_RF1 = 780MHz, f_RF2 = 781MHz,
P_RF1 = P_RF2 = 0dBm, f_IF1 = 185MHz,
f_IF2 = 184MHz, f_IF1+ f_IF2 term
IIP2
f_RF1 = 780MHz, f_RF2 = 735MHz,
P_RF1 = P_RF2 = 0dBm, f_IF1 = 185MHz,
f_IF2 = 230MHz, f_IF1+ f_IF2 term
Spurious Relative to a
Fundamental at 780MHz
Input Compression from Linear
I/Q Gain Mismatch
2LO - 2RF, f_RF = 872.5MHz, P_RF = -10dBm
3LO - 3RF, f_RF = 903.333MHz, P_RF = -10dBm
3RF - 2LO, f_RF = 705MHz, P_RF = -10dBm
4RF - 3LO, f_RF = 770MHz, P_RF = -10dBm
5RF - 4LO, f_RF = 809MHz, P_RF = -10dBm
P_RF = 0dBm to 21dBm
I/Q Phase Mismatch
1dB Conversion Loss Flatness
RF Return Loss
f_LO = 965MHz, f_LO > f_RF
LO Return Loss
70.1
dBm
70.2
84
99
105
dBc
114
115
0.17
dB
0.05
dB
0.4
Degrees
400
MHz
17
dB
12
dB
Note 5: Recommended functional range. Not production tested. Operation outside this range is possible, but with degraded
performance of some parameters.
Note 6: Guaranteed by design and characterization.
Note 7: Parameter also applies to demodulator topology.
Note 8: Single-carrier WCDMA with 10.5dB peak-to-average ratio at 0.1% complementary cumulative distribution function,
P_RF = -10dBm (P_RF is chosen to give -65dBc ACLR).
Note 9: No baseband drive input. Measured with the inputs terminated in 50Ω. At low output levels, the output noise is thermal.
Note 10: The output noise versus P_OUT curve has the slope of LO noise (Ln dBc/Hz) due to reciprocal mixing.
Note 11: Conversion loss is measured from the single-ended RF input to single-ended combined baseband output.
Note 12: 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 (Tp in Kelvin), F_BLOCK = 1 + (Lcn - 1) Tp / To + LP_BLOCK / (1000kTo), where
To = 290K, P_BLOCK in mW, k is Boltzmann’s constant = 1.381 x 10^(-23) J/K, and Lcn = 10^(Lc/10), Lc is the conversion loss.
Noise figure under-blocking in dB is NF_BLOCK = 10 x log (F_BLOCK). Refer to Application Note 3632: Wideband LO Noise in
Passive Transmit-Receive Mixer ICs.
Maxim Integrated
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