Manual
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
8 _______________________________________________________________________________________
-100
-90
-80
-70
-50
-60
-40
-20
-30
-10
0
0 2.01.0 4.03.0 6.0 7.05.0 8.0
MAX2655
SHUTDOWN TIME
MAX2655 toc31
TIME (us)
OUTPUT POWER (dBm)
5.8µs
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.)
-4
-8
-12
-16
0
4
8
12
-30 -22 -18-26 -14 -10 -6 -2 2
MAX2655
OUTPUT POWER vs. INPUT POWER
MAX2655 toc32
INPUT POWER (dBm)
OUTPUT POWER (dBm)
f
IN
= 1575MHz
R
BIAS
= 698Ω ±1%
R
BIAS
= 357Ω ±1%
R
BIAS
= 511Ω ±1%
-18
-15
-16
-17
-13
-14
-9
-10
-11
-12
-8
200 400 600 800 1000 1200 1400 1600
MAX2655
P
1dB
vs. R
BIAS
MAX2655 toc33
R
BIAS
(Ω)
P
1dB
(dBm)
f
IN
= 1575MHz
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
0
4
2
6
8
10
12
14
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc35
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
R
BIAS
= 511Ω ±1%
HIGH-GAIN MODE
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
6
4
2
8
10
12
14
16
18
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc36
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
R
BIAS
= 392Ω ±1%
HIGH-GAIN MODE
0
3
2
1
4
5
6
7
8
9
10
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc34
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
R
BIAS
= 715Ω ±1%
HIGH-GAIN MODE
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
-24
-20
-16
-12
-8
-4
0
1000 1200 1400 1600 1800 2000
MAX2655
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
MAX2655 toc29
FREQUENCY (MHz)
INPUT/OUTPUT RETURN LOSS (dB)
2200
INPUT RETURN LOSS
OUTPUT RETURN LOSS
MAX2655
REVERSE ISOLATION vs. FREQUENCY
MAX2655 toc30
-60
-55
-45
-50
-30
-25
-35
-40
-20
REVERSE ISOLATION (dB)
1000 1400 16001200
1800
2000 2200
FREQUENCY (MHz)
1.0
1.2
1.6
1.4
1.8
2.0
-40 0-20 20 40 60 80
MAX2655
NOISE FIGURE vs. TEMPERATURE
MAX2655 toc28
TEMPERATURE (°C)
NOISE FIGURE (dB)
f
IN
= 1575MHz
R
BIAS
= 511Ω ±1%