MAX2685 查看數據表（PDF） - Maxim Integrated
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MAX2685 Datasheet PDF : 10 Pages
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Low-Cost, 900MHz, Low-Noise Amplifier
and Downconverter Mixer
Typical Operating Characteristics (continued)
(MAX2685 EV kit, VCC = V SHDN = +3V, fLNAIN = fMIXIN = 880MHz, fLO = 960MHz, PLNAIN = -30dBm, PLO = -8dBm, PMIXIN = -25dBm,
differential IFOUT operation, Zo = 50Ω, TA = +25°C, unless otherwise noted.)
LNA INPUT IP3 vs. SUPPLY VOLTAGE
20
GAIN = LOW
TA = +25°C
15
TA = -40°C
10
TA = +85°C
5
0
GAIN = HIGH
TA = +25°C TA = +85°C
-5
-10
TA = -40°C
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
LNA GAIN vs. FREQUENCY
20
15 GAIN = HIGH
10
5
0
-5
-10
-15 GAIN = LOW
-20
800 825 850 875 900 925 950 975 1000
FREQUENCY (MHz)
LNA NOISE FIGURE vs. FREQUENCY
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
870 880 890 900 910 920 930 940 950 960
FREQUENCY (MHz)
LNA REVERSE ISOLATION vs. FREQUENCY
0
-5
-10
GAIN = LOW
-15
-20
-25
-30
-35
GAIN = HIGH
-40
800 825 850 875 900 925 950 975 1000
FREQUENCY (MHz)
LNA INPUT RETURN LOSS vs. FREQUENCY
-5
-6
-7
-8
-9
GAIN = HIGH
-10
-11
-12
GAIN = LOW
-13
-14
-15
800
840 880 920 960 1000
FREQUENCY (MHz)
LNA OUTPUT RETURN LOSS vs. FREQUENCY
0
-2
-4
-6
-8
-10
GAIN = LOW
-12
-14
-16
-18
-20
800
GAIN = HIGH
840 880 920 960 1000
FREQUENCY (MHz)
LNA S11 vs. FREQUENCY
(800MHz to 1000MHz UNMATCHED)
GAIN = LOW
1000 800
1000
GAIN = HIGH
800
LO
HI
MIXER GAIN vs. SUPPLY VOLTAGE
7.0
6.5 TA = -40°C
GAIN = HIGH
6.0
TA = +25°C
5.5
TA = +85°C
5.0
TA = -40°C
GAIN = LOW
4.5
4.0 TA = +25°C
3.5 TA = +85°C
3.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
MIXER INPUT IP3 vs. SUPPLY VOLTAGE
10
TA = +85°C
8
6
4
2
TA = +25°C
TA = +85°C TA = -40°C
GAIN = HIGH
0
-2
TA = +25°C
-4
GAIN = LOW
-6
TA = -40°C
-8
-10
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
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