300MHz to 2500MHz SiGe
Ultra-Low-Noise Amplifiers
RF ELECTRICAL CHARACTERISTICS (continued)
(V CC = +3.0V, P RFIN = -34dBm, Z O = 50 Ω , T A = +25°C, unless otherwise noted.) (Notes 2 and 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2641 (f RFIN = 1575MHz)
Gain
15.7
dB
Noise Figure
Input Return Loss
Output Return Loss
Reverse Isolation
Input 1dB Gain Compression Point
Input Third-Order Intercept Point
(Note 4)
(Note 7)
1.2
-8
-15
-31
-21
+1.4
dB
dB
dB
dB
dBm
dBm
MAX2641 (f RFIN = 2450MHz)
Gain
13.5
dB
Noise Figure
Input Return Loss
Output Return Loss
Reverse Isolation
Input 1dB Gain Compression Point
Input Third-Order Intercept Point
(Note 4)
(Note 8)
1.5
-10
-11
-24
-19
-2.5
dB
dB
dB
dB
dBm
dBm
Note 2: Guaranteed by design and characterization.
Note 3: Measured using typical operating circuit. Input and output impedance matching networks were optimized for best simulta-
neous gain and noise-figure performance.
Note 4: External component and circuit losses degrade noise-figure performance. Specification excludes external component and
circuit board losses.
Note 5: Measured with two input tones, f 1 = 899MHz, f 2 = 901MHz, both at -34dBm per tone.
Note 6: Measured with two input tones, f 1 = 1899MHz, f 2 = 1901MHz, both at -34dBm per tone.
Note 7: Measured with two input tones, f 1 = 1574MHz, f 2 = 1576MHz, both at -34dBm per tone.
Note 8: Measured with two input tones, f 1 = 2449MHz, f 2 = 2451MHz, both at -34dBm per tone.
Typical Operating Characteristics
(V CC = +3V, P RFIN = -34dBm, Typical Operating Circuits, T A = +25°C, unless otherwise noted.)
6
MAX2640
SUPPLY CURRENT vs. SUPPLY VOLTAGE
16
MAX2640 MATCHED AT 900MHz
GAIN vs. FREQUENCY
3
MAX2640 MATCHED AT 900MHz
NOISE FIGURE vs. FREQUENCY
T A = -40°C
5
4
3
T A = +85°C
T A = +25°C
T A = -40°C
15
14
T A = +25°C
T A = +85°C
2
T A = +85°C
T A = +25°C
2
1
13
1
T A = -40°C
0
12
0
2
3
4
5
6
800
840
880
920
960
1000
800
840
880
920
960
1000
V CC (V)
FREQUENCY (MHz)
FREQUENCY (MHz)
_______________________________________________________________________________________
3
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