Manual

MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
MAX2655
INPUT IP3 vs. R
BIAS
MAX2655 toc23
-10
-4
-6
-8
0
-2
6
8
4
2
10
INPUT IP3 (dBm)
200 600 800400
1000
1200 1400 1600
TEMPERATURE (°C)
T
A
= +85°C
P
IN
= -30dBm
f
1
= 1570MHz
f
2
= 1580MHz
T
A
= +25°C
T
A
= -40°C
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.)
-40 0 20-20 40 60 80
MAX2655
INPUT LOGIC VOLTAGE vs. TEMPERATURE
MAX2655 toc21
TEMPERATURE (°C)
INPUT LOGIC VOLTAGE (V)
0.5
1.0
1.5
2.0
INPUT LOGIC HIGH AT V
RFOUT
INPUT LOGIC LOW AT V
RFOUT
10
11
13
12
14
15
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
MAX2655 toc26
SUPPLY VOLTAGE (V)
GAIN (dB)
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
f
IN
= 1575MHz
R
BIAS
= 511Ω ±1%
MAX2655
GAIN vs. SUPPLY VOLTAGE
1.4
1.8
1.6
2.2
2.0
2.6
2.4
2.8
3.2
3.0
3.4
1000 1200 1400 1600 1800 2000
MAX2655
NOISE FIGURE vs. FREQUENCY
MAX2655 toc27
FREQUENCY (MHz)
NOISE FIGURE (dB)
R
BIAS
= 357Ω ±1%
R
BIAS
= 511Ω ±1%
R
BIAS
= 698Ω ±1%
8
11
10
9
13
12
17
16
15
14
18
200 400 600 800 1000 1200 1400 1600
MAX2655
GAIN vs. R
BIAS
MAX2655 toc25
R
BIAS
(Ω)
GAIN (dB)
f
IN
= 1575MHz
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
MAX2655
INPUT LOGIC CURRENT vs. TEMPERATURE
MAX2655 toc22
4
5
6
9
8
7
10
INPUT LOGIC CURRENT (µA)
-40 0 20-20
40
60 80
TEMPERATURE (°C)
INPUT LOGIC HIGH AT V
RFOUT
INPUT LOGIC LOW AT V
RFOUT
0
6
4
2
8
10
12
14
16
1000 1400 16001200 1800 2000 2200
MAX2655
GAIN vs. FREQUENCY
MAX2655 toc24
FREQUENCY (MHz)
GAIN (dB)
R
BIAS
= 511Ω ±1%
R
BIAS
= 357Ω ±1%
R
BIAS
= 698Ω ±1%
_______________________________________________________________________________________ 7
MAX2655
SUPPLY CURRENT vs. R
BIAS
MAX2655 toc19
0
2
6
4
12
14
10
8
16
SUPPLY CURRENT (mA)
200 600 800400
1000
1200 1400 1600
R
BIAS
(Ω)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
20
16
24
28
MAX2655
SHUTDOWN CURRENT vs. TEMPERATURE
MAX2655 toc20
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
0
4
8
12
-40 0 20-20 40 60 80
V
CC
= +6V
V
CC
= +3V