SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION)
(Typical Application Circuit, RF and LO ports are driven from 50 Ω sources, f RF < f LO . Typical values are at V CC = +5.0V, P IF = 0dBm,
P LO = 0dBm, f RF = 1250MHz, f LO = 1600MHz, f IF = 350MHz, T C = +25°C, unless otherwise noted.) (Note 7)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Conversion Power Loss
L C
7.5
dB
Third-Order Input Intercept
Point
LO-2IF Spurious Rejection
LO+2IF Spurious Rejection
LO-3IF Spurious Rejection
LO+3IF Spurious Rejection
LO Leakage at RF Port
IF Leakage at RF Port
RF Return Loss
IF Input Return Loss
IIP3
f IF1 = 350MHz, f IF2 = 351MHz, P IF = 0dBm/tone
P LO = +3dBm
f LO = 1200MHz
33.4
61
63.3
78
79
-35.7
-52
12.3
18
dBm
dBc
dBc
dBc
dBc
dBm
dBm
dB
dB
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Operation outside this range is possible, but with degraded performance of some parameters. See the Typical Operating
Characteristics section.
Not production tested.
All values reflect losses of external components, including a 0.6dB loss at f IF = 350MHz and a 0.8dB loss at
f IF = 1000MHz due to the 1:1 transformer. Output measurements were taken at IF outputs of the Typical Application Circuit.
Guaranteed by design and characterization.
100% production tested for functionality.
Note 10: Additional improvements (of up to 4dB to 6dB) in spurious responses can be made by increasing the LO drive to +6dBm.
Note 11: The LO return loss can be improved by tuning C9 to offset any parasitics within the specific application circuit. Typical
range of C9 is 10pF to 50pF.
_______________________________________________________________________________________
5
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