SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION) (continued)
(Typical Application Circuit, V CC = +4.75V to +5.25V, RF and LO ports are driven from 50 Ω sources, P LO = -3dBm to +3dBm,
P RF = 0dBm, f RF = 1000MHz to 1250MHz, f LO = 1200MHz to 2250MHz, f IF = 50MHz to 1000MHz, f RF < f LO , T C = -40°C to +85°C.
Typical values are at V CC = +5.0V, P RF = 0dBm, P LO = 0dBm, f RF =1200MHz, f LO = 1700MHz, f IF = 500MHz, T C = +25°C, unless
otherwise noted.) (Note 7)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Single tone, f RF = 1200MHz,
P RF =
-14dBm
87.5
101
3LO-3RF Spurious Rejection
3x3
50MHz < f IF < 1000MHz,
1250MHz < f LO < 2200MHz
(Notes 8, 9)
P RF =
-10dBm
79.5
93
dBc
P RF = 0dBm
59.5
73
LO Leakage at RF Port
LO Leakage at IF Port
P LO = +3dBm (Notes 6, 8)
P LO = +3dBm (Notes 8, 9)
-33.5
-26.3
-27.5
-22.9
dBm
dBm
RF-to-IF Isolation
RF Input Impedance
RF Input Return Loss
LO Input Impedance
LO Input Return Loss
Z RF
Z LO
f RF = 1200MHz, P LO = +3dBm (Notes 8, 9)
LO on and IF terminated with a matched
impedance
RF and IF terminated with a matched
impedance (Note 11)
24
51
50
12
50
11
dB
Ω
dB
Ω
dB
IF Output Impedance
Z IF
Nominal differential impedance at the IC’s
IF outputs
50
Ω
RF terminated into 50 Ω , LO driven by 50 Ω
IF Output Return Loss
source, IF transformed to 50 Ω single-ended
using external components shown in the
15
dB
Typical Application Circuit
4
_______________________________________________________________________________________
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