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300MHz to 450MHz Frequency-Programmable
ASK/FSK Transmitter
_______________________________________________________________________________________   5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
9
10
11
12
13
14
15
16
17
18
8
2.1
3.6
f
RF
 = 315MHz
PA ON
T
A
 = +25癈
T
A
 = -40癈
T
A
 = +85癈
T
A
 = +125癈
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
6
7
8
9
10
11
12
5
2.1
3.6
f
RF
 = 315MHz
50% DUTY CYCLE
T
A
 = +25癈
T
A
 = -40癈
T
A
 = +85癈
T
A
 = +125癈
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
2.5
3.0
3.5
4.0
4.5
5.0
6.0
5.5
2.0
2.1
3.6
f
RF
 = 315MHz
PA OFF
T
A
 = +25癈
T
A
 = -40癈
T
A
 = +85癈
T
A
 = +125癈
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
9
10
11
12
13
14
15
16
17
18
8
2.1
3.6
f
RF
 = 433.92MHz
PA ON
T
A
 = +25癈
T
A
 = -40癈
T
A
 = +85癈
T
A
 = +125癈
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
6
7
8
9
10
11
12
5
2.1
3.6
f
RF
 = 433.92MHz
50% DUTY CYCLE
T
A
 = +25癈
T
A
 = -40癈
T
A
 = +85癈
T
A
 = +125癈
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
3.5
4.0
4.5
5.0
5.5
6.0
7.0
6.5
3.0
2.1
3.6
f
RF
 = 433.92MHz
PA OFF
T
A
 = -40癈
T
A
 = +85癈
T
A
 = +125癈
T
A
 = +25癈
Typical Operating Characteristics
(50& system impedance, V
AVDD
= V
DVDD
= V
PAVDD
= +2.1V to +3.6V, f
RF
= 300MHz to 450MHz, T
A
= -40癈 to +125癈, unless oth-
erwise noted. Typical values are at V
AVDD
= V
DVDD
= V
PAVDD
= +2.7V, T
A
= +25癈, unless otherwise noted.)
OUTPUT POWER
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
2
4
6
8
10
14
12
0
2.1
3.6
f
RF
 = 315MHz
PA ON
T
A
 = +85癈
T
A
 = +125癈
T
A
 = +25癈
T
A
 = -40癈
OUTPUT POWER
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.3
3.0
2.7
2.4
2
4
6
8
10
14
12
0
2.1
3.6
f
RF
 = 433.92MHz
PA ON
T
A
 = +85癈
T
A
 = +125癈
T
A
 = -40癈, +25癈
SUPPLY CURRENT AND OUTPUT POWER
vs. EXTERNAL RESISTOR
MAX7057 toc09
EXTERNAL RESISTOR (&)
1000
100
10
1
2
4
6
8
10
14
12
0
-15
-10
-5
0
5
15
10
-25
-20
0.1
10,000
f
RF
 = 315MHz
PA ON
SUPPLY CURRENT
OUTPUT POWER
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