Manual

SiGe, High-Linearity, 2300MHz to 4000MHz
Downconversion Mixer with LO Buffer
MAX19998
4 ______________________________________________________________________________________
3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS—f
RF
= 3100MHz to 3900MHz,
LOW-SIDE LO INJECTION
(Typical Application Circuit, with tuning elements outlined in Table 1, R1 = 845ω, R2 = 1.1kω, RF and LO ports are driven from 50I
sources, f
RF
> f
LO
. Typical values are for T
C
= +25NC, V
CC
= 3.3V, P
RF
= -5dBm, P
LO
= 0dBm, f
RF
= 3500MHz, f
LO
= 3200MHz, f
IF
= 300MHz, unless otherwise noted.) (Note 7)
5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS—f
RF
= 3100MHz to 3900MHz,
LOW-SIDE LO INJECTION (continued)
(Typical Application Circuit, with tuning elements outlined in Table 1, R1 = 698ω, R2 = 604ω, V
CC
= 4.75V to 5.25V, RF and LO ports
are driven from 50I sources, P
LO
= -3dBm to +3dBm, P
RF
= -5dBm, f
RF
= 3100MHz to 3900MHz, f
IF
= 300MHz, f
LO
= 2800MHz to
3600MHz, f
RF
> f
LO
, T
C
= -40NC to +85NC. Typical values are for T
C
= +25NC, V
CC
= 5.0V, P
RF
= -5dBm, P
LO
= 0dBm, f
RF
= 3500MHz,
f
LO
= 3200MHz, f
IF
= 300MHz. All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 7)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Small-Signal Conversion Gain G
C
8.4 dB
Gain Variation vs. Frequency
DG
C
f
RF
= 3100MHz to 3900MHz, any 100MHz
band
0.15 dB
Conversion Gain Temperature
Coefficient
TC
CG
f
RF
= 3100MHz to 3900MHz,
T
C
= -40NC to +85NC
-0.01
dB/NC
Input 1dB Compression Point IP
1dB
(Note 10) 7.7 dBm
Third-Order Input Intercept Point IIP3 f
RF1
- f
RF2
= 1MHz, P
RF1
= P
RF2
= -5dBm/tone 20.1 dBm
IIP3 Variation with T
C
f
RF1
- f
RF2
= 1MHz, P
RF1
= P
RF2
= -5dBm/tone,
T
C
= -40NC to +85NC
Q0.2
dB
Single-Sideband Noise Figure NF
SSB
No blockers present 9.3 dB
Noise Figure Temperature
Coefficient
TC
NF
Single sideband, no blockers present,
T
C
= -40NC to +85NC
0.018
dB/NC
2RF - 2LO Spur Rejection 2 x 2 f
SPUR
= f
LO
+ 150MHz
P
RF
= -10dBm 64
dBc
P
RF
= -5dBm 59
3RF - 3LO Spur Rejection 3 x 3 f
SPUR
= f
LO
+ 100MHz
P
RF
= -10dBm 74
dBc
P
RF
= -5dBm 64
RF Input Return Loss RL
RF
LO on and IF terminated into a matched
impedance
30 dB
LO Input Return Loss RL
LO
RF and IF terminated into a matched imped-
ance
20 dB
IF Output Impedance Z
IF
Nominal differential impedance at the IC’s IF
outputs
200
I
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RF-to-IF Isolation f
RF
= 3500MHz, P
LO
= +3dBm (Note 9) 27 29.5 dB
LO Leakage at RF Port
f
LO
= 2800MHz to 3600MHz, P
LO
= +3dBm
(Note 9)
-26 dBm
2LO Leakage at RF Port P
LO
= +3dBm -29 dBm
LO Leakage at IF Port P
LO
= +3dBm (Note 9) -22 dBm