Manual

MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
______________________________________________________________________________________ 11
0
-2
-4
-6
-8
-10
-12
-14
1000 1600 18001200 1400 2000 2200
MAX2656
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
MAX2654 toc55
FREQUENCY (MHz)
INPUT/OUTPUT RETURN LOSS (dB)
HIGH-GAIN MODE
INPUT
RETURN LOSS
OUTPUT
RETURN LOSS
-45
-50
-55
-60
-25
-20
-30
-35
-40
1000 1600 18001200 1400 2000 2200
MAX2656
REVERSE ISOLATION vs. FREQUENCY
MAX2654 toc56
FREQUENCY (MHz)
REVERSE ISOLATION (dB)
HIGH-GAIN MODE
LOW-GAIN MODE
-40
-30
-35
-20
-25
-15
-10
0 2.01.0 3.0 4.0
MAX2656
GAIN STEP TIME FROM LOW TO HIGH
MAX2654 toc57
TIME (µs)
OUTPUT POWER (dBm)
2.0µs
-40
-30
-35
-20
-25
-15
-10
0 2.01.0 3.0 4.0
MAX2656
GAIN STEP TIME FROM HIGH TO LOW
MAX2654 toc58
TIME (µs)
OUTPUT POWER (dBm)
2.0µs
-20
10
8
6
4
2
0
-2
-4
-6
-8
-10
-12
-14
-18
-16
-30 -15 -10-25 -20 -5 0
MAX2656
OUTPUT POWER vs. INPUT POWER
MAX2654 toc59
INPUT POWER (dBm)
OUTPUT POWER (dBm)
f
IN
= 1960MHz
HIGH-GAIN MODE
R
BIAS
= 715Ω ±1%
R
BIAS
= 511Ω ±1%
R
BIAS
= 392Ω ±1%
-30
2
-2
-6
-10
-14
-18
-22
-26
-30 -15 -10-25 -20 -5 0
MAX2656
OUTPUT POWER vs. INPUT POWER
MAX2654 toc60
INPUT POWER (dBm)
OUTPUT POWER (dBm)
f
IN
= 1960MHz
LOW-GAIN MODE
R
BIAS
= 715Ω ±1%
R
BIAS
= 511Ω ±1%
R
BIAS
= 392Ω ±1%
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.)
-12
2
4
0
-4
-2
-6
-10
-8
200 600 800400 1000 1200 1400 1600
MAX2656
P
1dB
vs. R
BIAS
MAX2654 toc62
R
BIAS
(Ω)
P
1dB
(dBm)
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
f
IN
= 1960MHz
HIGH-GAIN MODE
-10
2
4
0
-4
-2
-6
-8
200 600 800400 1000 1200 1400 1600
MAX2656
P
1dB
vs. R
BIAS
MAX2654 toc61
R
BIAS
(Ω)
P
1dB
(dBm)
T
A
= +25°C
T
A
= +40°C
f
IN
= 1960MHz
LOW-GAIN MODE
T
A
= +85°C