Rainbow Electronics MAX19998 - Manual (Page 6)

SiGe, High-Linearity, 2300MHz to 4000MHz
Downconversion Mixer with LO Buffer
MAX19998
6 ______________________________________________________________________________________
5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS—fRF = 3100MHz to 3900MHz,
HIGH-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, PRF = -5dBm, f RF = 3100MHz to 3900MHz, f IF = 300MHz, f LO = 3400MHz
to 4200MHz, 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 = 3800MHz, f IF = 300MHz, unless otherwise noted.) (Note 7)
5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS—fRF = 2300MHz to 2900MHz,
HIGH-SIDE LO INJECTION
(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, PRF = -5dBm, f RF = 2300MHz to 2900MHz, f IF = 300MHz, f LO = 2600MHz
to 3200MHz, 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 =
2600MHz, f LO = 2900MHz, f IF = 300MHz, unless otherwise noted.) (Note 7)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RF Input Return Loss RL RF
LO on and IF terminated into a matched
impedance
24 dB
LO Input Return Loss RL LO
RF and IF terminated into a matched
impedance
18 dB
IF Output Impedance Z IF
Nominal differential impedance at the IC’s IF
outputs
200
I
IF Output Return Loss RL IF
RF terminated into
50I, LO driven by 50I
source, IF transformed
to 50I using external
components shown in
the Typical Application
Circuit. See the Typical
Operating Characteristics
for performance vs.
inductor values. f IF = 450MHz,
L1 = L2 = 120nH
20
dB
f
IF
= 350MHz,
L1 = L2 = 270nH
20
f IF = 300MHz,
L1 = L2 = 390nH
20
RF-to-IF Isolation P LO = +3dBm 30 dB
LO Leakage at RF Port P LO = +3dBm -30.3 dBm
2LO Leakage at RF Port P LO = +3dBm -19 dBm
LO Leakage at IF Port P LO = +3dBm -23 dBm
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Small-Signal Conversion Gain G C T C = +25NC 8.4 dB
Gain Variation vs. Frequency D G C
f RF = 2300MHz to 2900MHz, any 100MHz
band
0.15
dB
f RF = 2300MHz to 2900MHz, any 200MHz
band
0.3
Conversion Gain Temperature
Coefficient
TC CG
f RF = 2300MHz to 2900MHz,
T C = -40NC to +85NC
-0.01 dB/NC
Input 1dB Compression Point IP 1dB (Note 10) 11.4 dBm
Third-Order Input Intercept Point IIP3
f RF1 - f RF2 = 1MHz, P RF1 = P RF2 = -5dBm/tone,
T C = +25NC
25.0 dBm