
300MHz to 450MHz High-Efficiency,
Crystal-Based +13dBm ASK Transmitter
Typical Operating Characteristics
(Typical Application Circuit, V DD = +2.7V, T A = +25°C, unless otherwise noted.) (Note 1)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
23
21
19
17
15
13
f RF = 315MHz
PA ON
T A = +25 ° C
T A = -40 ° C
T A = +85 ° C
13
12
11
10
9
8
f RF = 315MHz
PA 50% DUTY CYCLE AT 10kHz
T A = +25 ° C
T A = -40 ° C
T A = +85 ° C
22
20
18
16
14
f RF = 433MHz
PA ON
T A = +25 ° C
T A = -40 ° C
T A = +85 ° C
11
9
T A = +125 ° C
7
6
T A = +125 ° C
12
10
T A = +125 ° C
7
5
8
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
OUTPUT POWER
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
OUTPUT POWER
vs. SUPPLY VOLTAGE
14
13
12
f RF = 433MHz
PA 50% DUTY CYCLE AT 10kHz
T A = -40 ° C
18
16
f RF = 315MHz
PA ON
T A = -40 ° C
18
16
f RF = 433MHz
PA ON
T A = -40 ° C
T A = +25 ° C
11
10
9
8
7
T A = +25 ° C
T A = +125 ° C
T A = +85 ° C
14
12
10
T A = +25 ° C
T A = +125 ° C
T A = +85 ° C
14
12
10
T A = +125 ° C
T A = +85 ° C
6
8
8
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
REFERENCE SPUR MAGNITUDE
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
FREQUENCY STABILITY
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
-70
REFERENCE SPUR = f RF ± f XTAL
3
70
f RF = 315MHz
-72
-74
f RF = 433MHz
2
1
0
f RF = 433MHz
f RF = 315MHz
65
60
55
50
PA ON
T A = +25 ° C
T A = -40 ° C
-76
-1
45
-78
f RF = 315MHz
-2
40
35
T A = +125 ° C
T A = +85 ° C
-80
-3
30
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
4
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