MAX2680(1998) 查看數據表（PDF） - Maxim Integrated
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MAX2680 Datasheet PDF : 12 Pages
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400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Typical Operating Characteristics (continued)
(Typical Operating Circuit, VCC = SHDN = +3.0V, PRFIN = -25dBm, PLO = -5dBm, TA = +25°C, unless otherwise noted.)
MAX2680
IF PORT IMPEDANCE vs. IF FREQUENCY
1200
1000
MAX2680/1/2-22
fLO = 970MHz
PLO = -5dBm
0
-100
MAX2681
IF PORT IMPEDANCE vs. IF FREQUENCY
1200
1000
MAX2680/1/2-23
fLO = 970MHz
PLO = -5dBm
0
-100
800
IMAGINARY
-200
800
-200
IMAGINARY
600
-300
600
-300
400
-400
400
-400
200
REAL
-500
200
REAL
-500
0
-600
0
100 200 300 400 500
IF FREQUENCY (MHz)
0
-600
0
100 200 300 400 500
IF FREQUENCY (MHz)
+10
+5
0
-5
-10
-15
-20
-25
-30
-35
-40
200
MAX2680
LO PORT RETURN LOSS
760 1320 1880 2440 3000
FREQUENCY (MHz)
+10
+5
0
-5
-10
-15
-20
-25
-30
-35
-40
200
MAX2681
LO PORT RETURN LOSS
760 1320 1880 2440 3000
FREQUENCY (MHz)
MAX2680
LO-to-IF AND LO-to-RF ISOLATION
35
30
LO-to-IF ISOLATION
25
20
LO-to-RF ISOLATION
15
10
5
0
0
500 1000 1500 2000 2500
LO FREQUENCY (MHz)
MAX2681
LO-to-IF AND LO-to-RF ISOLATION
40
35
LO-to-IF ISOLATION
30
25
20
LO-to-RF ISOLATION
15
10
5
0
0
500 1000 1500 2000 2500
LO FREQUENCY (MHz)
MAX2682
IF PORT IMPEDANCE vs. IF FREQUENCY
800
0 MAX2680/1/2-24
fLO = 970MHz
700
PLO = -5dBm -50
600
-100
500
-150
IMAGINARY
400
-200
300
-250
200
-300
100
REAL
-350
0
-400
0
100 200 300 400 500
IF FREQUENCY (MHz)
+10
+5
0
-5
-10
-15
-20
-25
-30
-35
-40
200
MAX2682
LO PORT RETURN LOSS
760 1320 1880 2440 3000
FREQUENCY (MHz)
MAX2682
LO-to-IF AND LO-to-RF ISOLATION
35
30
LO-to-IF ISOLATION
25
20
LO-to-RF ISOLATION
15
10
0
500 1000 1500 2000 2500
LO FREQUENCY (MHz)
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