Rainbow Electronics MAX2682 - Manual (Page 6)

MAX2680/MAX2681/MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Typical Operating Circuit, V CC = SHDN = +3.0V, P RFIN = -25dBm, P LO = -5dBm, T A = +25°C, unless otherwise noted.)
-10
-8
-9
-7
-6
-5
-14 -10 -8 -12 -6 -4 -2 0
MAX2680
INPUT IP3 vs. LO POWER
MAX2680/1/2-13
LO POWER (dBm)
INPUT IP3 (dBm)
f RF = 1950MHz, 1951MHz
f LO = 1880MHz
f IF = 70MHz
P RFIN = -25dBm PER TONE
-3
-1
-2
0
1
2
-14 -10 -8 -12 -6 -4 -2 0
MAX2681
INPUT IP3 vs. LO POWER
MAX2680/1/2-14
LO POWER (dBm)
INPUT IP3 (dBm)
f RF = 1950MHz, 1951MHz
f LO = 1880MHz
f IF = 70MHz
P RFIN = -25dBm PER TONE
0
3
2
4
1
5
6
7
-14 -10 -8 -12 -6 -4 -2 0
MAX2682
INPUT IP3 vs. LO POWER
MAX2680/1/2-15
LO POWER (dBm)
INPUT IP3 (dBm)
f RF = 1950MHz, 1951MHz
f
LO
= 1880MHz
f IF = 70MHz
P RFIN = -25dBm PER TONE
0
6
4
10
8
2
12
14
16
-14 -10 -8 -12 -6 -4 -2 0
MAX2680
NOISE FIGURE vs. LO POWER
MAX2680/1/2-16
LO POWER (dBm)
NOISE FIGURE (dB)
f
RF
= 900MHz
f RF = 1950MHz
f RF = 2450MHz
f RF
900MHz
1950MHz
2450MHz
f LO
970MHz
2020MHz
2210MHz
f IF
70MHz
70MHz
70MHz
0
150
100
50
200
250
300
0 1000 500 1500 2000 2500
MAX2680
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2680/1/2-19
RF FREQUENCY (MHz)
REAL IMPEDANCE (
Ω
)
-600
-300
-400
-500
-200
-100
0
IMAGINARY IMPEDANCE (
Ω
)
IMAGINARY
REAL
f LO = 970MHz
P LO = -5dBm
0
8
6
14
12
10
2
4
16
18
20
-14 -10 -8 -12 -6 -4 -2 0
MAX2681
NOISE FIGURE vs. LO POWER
MAX2680/1/2-17
LO POWER (dBm)
NOISE FIGURE (dB)
f RF = 900MHz
f RF = 1950MHz
f RF = 2450MHz
f RF
900MHz
1950MHz
2450MHz
f LO
970MHz
2020MHz
2210MHz
f IF
70MHz
70MHz
70MHz
0
10
5
15
20
25
-14 -10 -8 -12 -6 -4 -2 0
MAX2682
NOISE FIGURE vs. LO POWER
MAX2680/1/2-18
LO POWER (dBm)
NOISE FIGURE (dB)
f RF = 900MHz
f RF = 1950MHz
f RF = 2450MHz
f RF
900MHz
1950MHz
2450MHz
f LO
970MHz
2020MHz
2210MHz
f IF
70MHz
70MHz
70MHz
0
150
100
50
200
250
300
0 500 1000 1500 2000 2500
MAX2681
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2680/1/2-20
RF FREQUENCY (MHz)
REAL IMPEDANCE (
Ω
)
IMAGINARY
REAL
f LO = 970MHz
P LO = -5dBm
-600
-300
-400
-500
-200
-100
0
IMAGINARY IMPEDANCE (
Ω
)
0
150
100
50
200
250
300
0 1000 500 1500 2000 2500
MAX2682
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2680/1/2-21
RF FREQUENCY (MHz)
REAL IMPEDANCE (
Ω
)
-600
-300
-400
-500
-200
-100
0
IMAGINARY IMPEDANCE (
Ω
)
IMAGINARY
REAL f LO = 970MHz
P LO = -5dBm