Datasheet

MAX2021
High-Dynamic-Range, Direct Up-/Downconversion
650MHz to 1200MHz Quadrature Mod/Demod
5
Maxim Integrated
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
f
RF1
= 780MHz, f
RF2
= 781MHz,
P
RF1
= P
RF2
= 0dBm, f
IF1
= 185MHz,
f
IF2
= 184MHz, f
IF1
+ f
IF2
term
70.1
Input Second-Order Intercept
Point
IIP2
f
RF1
= 780MHz, f
RF2
= 735MHz,
P
RF1
= P
RF2
= 0dBm, f
IF1
= 185MHz,
f
IF2
= 230MHz, f
IF1
+ f
IF2
term
70.2
dBm
2LO - 2RF, f
RF
= 872.5MHz, P
RF
= -10dBm 84
3LO - 3RF, f
RF
= 903.333MHz, P
RF
= -10dBm 99
3RF - 2LO, f
RF
= 705MHz, P
RF
= -10dBm
105
4RF - 3LO, f
RF
= 770MHz, P
RF
= -10dBm
114
Spurious Relative to a
Fundamental at 780MHz
5RF - 4LO, f
RF
= 809MHz, P
RF
= -10dBm
115
dBc
Input Compression from Linear
P
RF
= 0dBm to 21dBm
0.17
dB
I/Q Gain Mismatch
0.05
dB
I/Q Phase Mismatch 0.4
Degrees
1dB Conversion Loss Flatness
f
LO
= 965MHz, f
LO
> f
RF
400
MHz
RF Return Loss 17 dB
LO Return Loss 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
.
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.)