Datasheet

MAX2235
+3.6V, 1W Autoramping Power
Amplifier for 900MHz Applications
4 _______________________________________________________________________________________
Typical Operating Characteristics
(MAX2235 Evaluation Kit, GC = unconnected, f
RFIN
= 836MHz, V
CC
= V
SHDN
= +3.6V, T
A
= +25°C, unless otherwise noted.)
0
200
100
400
300
600
500
700
010155 20253035
SUPPLY CURRENT vs. OUTPUT POWER
MAX2235 toc01
OUTPUT POWER (dBm)
I
CC
(mA)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
-20
0
-10
20
10
30
40
0 1.00.5 1.5 2.0 2.5
OUTPUT POWER
vs. VOLTAGE AT GC PIN
MAX2235 toc02
V
GC
(V)
OUTPUT POWER (dBm)
P
RFIN
= 0dBm
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
0
10
5
20
15
30
25
35
-25 -15 -10-20 -5 0 5 10
OUTPUT POWER vs. INPUT POWER
MAX2235 toc03
INPUT POWER (dBm)
OUTPUT POWER (dBm)
V
CC
= +5.0V
V
CC
= +3.6V
V
CC
= +3.0V
V
CC
= +2.7V
0
10
5
20
15
30
25
35
-25 -15 -10-20 -5 0 5 10
OUTPUT POWER vs. INPUT POWER
AND TEMPERATURE
MAX2235 toc04
INPUT POWER (dBm)
OUTPUT POWER (dBm)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
0
20
10
40
30
50
60
015205 10 253035
EFFICIENCY vs. OUTPUT POWER
MAX2235 toc07
OUTPUT POWER (dBm)
EFFICIENCY (%)
V
CC
= +5.0V
V
CC
= +3.6V
V
CC
= +3.0V
V
CC
= +2.7V
-60
-40
-50
-20
-30
-10
0
-25 -10 -5-20 -15 0 5 10
SECOND AND THIRD HARMONICS
vs. INPUT POWER
MAX2235 toc05
INPUT POWER (dBm)
HARMONIC POWER (dBm)
2nd
3rd
0
10
5
20
15
30
25
35
820 830 835825 840 845 850 855
OUTPUT POWER vs. FREQUENCY
MAX2235 toc06
INPUT FREQUENCY (MHz)
OUTPUT POWER (dBm)
P
RFIN
= +3dBm
P
RFIN
= -5dBm
P
RFIN
= -13dBm
P
RFIN
= -21dBm
MATCHED AT
836MHz
0
10
5
20
15
30
25
35
010155 20253035
POWER GAIN vs. OUTPUT POWER
MAX2235 toc08
OUTPUT POWER (dBm)
POWER GAIN (dB)
V
CC
= +5.0V
V
CC
= +3.6V
V
CC
= +3.0V
40
V
CC
= +2.7V
0
10
5
20
15
35
30
25
40
0105 1520253035
POWER GAIN vs. OUTPUT POWER
AND TEMPERATURE
MAX2235 toc09
OUTPUT POWER (dBm)
POWER GAIN (dB)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C