Manual

MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
10 ______________________________________________________________________________________
0
16
14
12
10
8
6
4
2
1000 16001200 1400 20001800 2200
MAX2656
GAIN vs. FREQUENCY
MAX2654 toc46
FREQUENCY (MHz)
GAIN (dB)
HIGH-GAIN MODE
R
BIAS
= 392Ω ±1%
R
BIAS
= 698Ω ±1%
R
BIAS
= 511Ω ±1%
-4
4
3
2
1
0
-1
-2
-3
1000 1600 18001200 1400 2000 2200
MAX2656
GAIN vs. FREQUENCY
MAX2654 toc47
FREQUENCY (MHz)
GAIN (dB)
LOW-GAIN MODE
R
BIAS
= 392Ω ±1%
R
BIAS
= 715Ω ±1%
R
BIAS
= 511Ω ±1%
6
14
17
15
16
18
13
8
11
9
10
12
7
200 600 800400 1000 1200 1400 1600
MAX2656
GAIN vs. R
BIAS
MAX2654 toc48
R
BIAS
(Ω)
GAIN (dB)
f
IN
= 1960MHz
HIGH-GAIN MODE
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
-2
2
3
4
-1
0
1
200 600 800400 1000 1200 1400 1600
MAX2656
GAIN vs. R
BIAS
MAX2654 toc49
R
BIAS
(Ω)
GAIN (dB)
f
IN
= 1960MHz
LOW-GAIN MODE
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
0
1
2
3
2.5 4.0 4.53.0 3.5 5.0 5.5 6.0
MAX2656
GAIN vs. SUPPLY VOLTAGE
MAX2654 toc50
SUPPLY VOLTAGE (V)
GAIN (dB)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
R
BIAS
= 511Ω ±1%
f
IN
= 1960MHz
LOW-GAIN MODE
14.0
14.5
15.0
15.5
16.0
2.5 4.0 4.53.0 3.5 5.0 5.5 6.0
MAX2656
GAIN vs. SUPPLY VOLTAGE
MAX2654 toc51
SUPPLY VOLTAGE (V)
GAIN (dB)
R
BIAS
= 511Ω ±1%
f
1
= 1960MHz
HIGH-GAIN MODE
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
1.4
1.6
2.0
1.8
2.2
2.4
1500 1700 18001600 1900 2000 2100 2200 2300
MAX2656
NOISE FIGURE vs. FREQUENCY
MAX2654 toc52
FREQUENCY
(
MHz
)
NOISE FIGURE (dB)
R
BIAS
= 715Ω ±1%
R
BIAS
= 511Ω ±1%
R
BIAS
= 392Ω ±1%
2.2
2.0
2.4
1.8
1.6
1.4
1.2
1.0
-40 20
-20
0406080
MAX2656
NOISE FIGURE vs. TEMPERATURE
MAX2654 toc53
TEMPERATURE
(
°C
)
NOISE FIGURE (dB)
f
1
= 1960MHz
R
BIAS
= 511Ω ±1%
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
1000 1600 18001200 1400 2000 2200
MAX2656
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
MAX2654 toc54
FREQUENCY
(
MHz
)
INPUT/OUTPUT RETURN LOSS (dB)
LOW-GAIN MODE
INPUT
RETURN LOSS
OUTPUT
RETURN LOSS
Typical Operating Characteristics (continued)
(P
IN
= -30dBm, input and output are terminated to 50Ω, V
CC
= +3V, high-gain and low-gain modes are applicable only to the MAX2656,
T
A
= +25°C, unless otherwise noted.)