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SiGe High-Linearity, 815MHz to 995MHz
Downconversion Mixer with LO Buffer/Switch
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX9986 Typical Application Circuit , V CC = +4.75V to +5.25V, RF and LO ports are driven from 50 ? sources,
+3dBm, P RF = -5dBm, f RF = 815MHz to 995MHz, f LO = 960MHz to 1180MHz, f IF = 160MHz, f LO > f RF , T C = -40°C
otherwise noted. Typical values are at V CC = +5V, P RF = -5dBm, P LO = 0dBm, f RF = 910MHz, f LO = 1070MHz, f IF
+25°C, unless otherwise noted.) (Note 1)
P LO = -3dBm to
to +85°C, unless
= 160MHz, T C =
PARAMETER
Noise Figure
SYMBOL
NF
CONDITIONS
Single sideband, f IF = 190MHz
MIN
TYP
9.3
MAX
UNITS
dB
f RF = 900MHz (no signal)
f LO = 1090MHz
P BLOCKER =
+8dBm
19
Noise Figure Under-Blocking
f BLOCKER = 990MHz
dB
f IF = 190MHz
(Note 4)
P BLOCKER =
+11dBm
24
f BLOCKER = 911MHz
Small-Signal Compression
Under-Blocking Condition
LO Drive
P BLOCKER =
P FUNDAMENTAL = -5dBm +8dBm
f FUNDAMENTAL = 910MHz
P BLOCKER =
+11dBm
-3
0.3
2
+3
dB
dBm
Spurious Response at IF
2x2
3x3
2LO-2RF
3LO-3RF
P RF = -10dBm
P RF = -5dBm
P RF = -10dBm
P RF = -5dBm
67
62
87
77
dBc
LO1 to LO2 Isolation
LO Leakage at RF Port
LO Leakage at IF Port
P LO = +3dBm
T C = +25°C (Note 5)
P LO = +3dBm
P LO = +3dBm
LO2 selected
LO1 selected
42
42
49
50
-47
-30
dB
dBm
dBm
RF-to-IF Isolation
46
dB
LO Switching Time
RF Port Return Loss
50% of LOSEL to IF settled to within 2 °
50
20
ns
dB
LO Port Return Loss
LO1/2 port selected,
LO2/1 and IF terminated
LO1/2 port unselected,
LO2/1 and IF terminated
27
26
dB
IF Port Return Loss
LO driven at 0dBm, RF terminated into 50 ? ,
differential 200 ?
22
dB
Note 1:
Note 2:
Note 3:
Note 4:
All limits include external component losses. Output measurements taken at IF output of the Typical Application Circuit .
Operation outside this range is possible, but with degraded performance of some parameters.
Compression point characterized. It is advisable not to operate continuously the mixer RF input above +12dBm.
Measured with external LO source noise filtered so the noise floor is -174dBm/Hz. This specification reflects the effects of all
SNR degradations in the mixer, including the LO noise as defined in Maxim Application Note 2021.
Note 5: Guaranteed by design and characterization.
_______________________________________________________________________________________
3
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