Datasheet

MAX19985A
Dual, SiGe, High-Linearity, 700MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
6 _______________________________________________________________________________________
Note 5: Not production tested. Operation outside this range is possible, but with degraded performance of some parameters. See
the
Typical Operating Characteristics . Performance is optimized for RF frequencies of 824MHz to 915MHz.
Note 6: All limits reflect losses of external components. Output measurements taken at IF outputs of
Typical Application Circuit .
Note 7: 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 the Application Note 2021:
Specifications and
Measurement of Local Oscillator Noise in Integrated Circuit Base Station Mixers
.
Note 8: Measured at IF port at IF frequency. LOSEL may be in any logic state.
Note 9: Limited production testing.
Note 10: Guaranteed by production testing.
+3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued)
( Typical Application Circuit , RF and LO ports are driven from 50Ω sources. Typical values are at V
CC
= +3.3V, P
RF
= -5dBm,
P
LO
= 0dBm, f
RF
= 900MHz, f
LO
= 1100MHz, f
IF
= 200MHz, T
C
=+25°C, unless otherwise noted.) (Note 6)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
IF Terminal Output Impedance Z
IF
Nominal differential impedance at the IC’s
IF output
200
Ω
IF Output Return Loss
RF terminated in 50Ω; transformed to 50Ω
using external components shown in the
Typical Application Circuit
17 dB