Rainbow Electronics MAX2682 - Manual (Page 7)

MAX2680/MAX2681/MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
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0
600
400
200
800
1000
1200
0 200 100 300 400 500
MAX2680
IF PORT IMPEDANCE vs. IF FREQUENCY
MAX2680/1/2-22
IF FREQUENCY (MHz)
REAL IMPEDANCE (
Ω
)
-600
-300
-400
-500
-200
-100
0
IMAGINARY IMPEDANCE (
Ω
)
IMAGINARY
REAL
f LO = 970MHz
P LO = -5dBm
0
600
400
200
800
1000
1200
0 200 100 300 400 500
MAX2681
IF PORT IMPEDANCE vs. IF FREQUENCY
MAX2680/1/2-23
IF FREQUENCY (MHz)
REAL IMPEDANCE (
Ω
)
-600
-300
-400
-500
-200
-100
0
IMAGINARY IMPEDANCE (
Ω
)
IMAGINARY
REAL
f LO = 970MHz
P LO = -5dBm
0
300
200
100
500
400
600
700
800
0 200 100 300 400 500
MAX2682
IF PORT IMPEDANCE vs. IF FREQUENCY
MAX2680/1/2-24
IF FREQUENCY (MHz)
REAL IMPEDANCE (
Ω
)
-400
-350
-250
-200
-300
-150
-50
-100
0
IMAGINARY IMPEDANCE (
Ω
)
IMAGINARY
REAL
f LO = 970MHz
P LO = -5dBm
-40
-30
-35
-20
-25
-10
-15
-5
+5
0
+10
200 760 1320 1880 2440 3000
MAX2680
LO PORT RETURN LOSS
MAX2680/1/2-25
FREQUENCY (MHz)
RETURN LOSS (dB)
0
10
5
20
15
30
25
35
0 1000 500 1500 2000 2500
MAX2680
LO-to-IF AND LO-to-RF ISOLATION
MAX2680/1/2-28
LO FREQUENCY (MHz)
ISOLATION (dB)
LO-to-IF ISOLATION
LO-to-RF ISOLATION
-40
-30
-35
-20
-25
-10
-15
-5
+5
0
+10
200 760 1320 1880 2440 3000
MAX2681
LO PORT RETURN LOSS
MAX2680/1/2-26
FREQUENCY (MHz)
RETURN LOSS (dB)
-40
-30
-35
-20
-25
-10
-15
-5
+5
0
+10
200 760 1320 1880 2440 3000
MAX2682
LO PORT RETURN LOSS
MAX2680/1/2-27
FREQUENCY (MHz)
RETURN LOSS (dB)
0
10
5
25
20
15
35
30
40
0 1000 500 1500 2000 2500
MAX2681
LO-to-IF AND LO-to-RF ISOLATION
MAX2680/1/2-29
LO FREQUENCY (MHz)
ISOLATION (dB)
LO-to-IF ISOLATION
LO-to-RF ISOLATION
10
15
25
20
30
35
0 1000 500 1500 2000 2500
MAX2682
LO-to-IF AND LO-to-RF ISOLATION
MAX2680/1/2-30
LO FREQUENCY (MHz)
ISOLATION (dB)
LO-to-IF ISOLATION
LO-to-RF ISOLATION
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.)