Typical operating characteristics – Rainbow Electronics MAX7044 User Manual
Page 4
MAX7044
300MHz to 450MHz High-Efficiency,
Crystal-Based +13dBm ASK Transmitter
4
_______________________________________________________________________________________
Typical Operating Characteristics
(Typical Application Circuit, V
DD
= +2.7V, T
A
= +25°C, unless otherwise noted.) (Note 1)
7
9
11
13
15
17
19
21
23
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX7044 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
f
RF
= 315MHz
PA ON
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
T
A
= +125°C
5
6
7
8
9
10
11
12
13
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX7044 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +25°C
f
RF
= 315MHz
PA 50% DUTY CYCLE AT 10kHz
T
A
= -40°C
T
A
= +85°C
T
A
= +125°C
8
12
10
16
14
20
18
22
2.1
2.7
2.4
3.0
3.3
3.6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX7044 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +25°C
f
RF
= 433MHz
PA ON
T
A
= -40°C
T
A
= +85°C
T
A
= +125°C
6
7
8
9
10
11
12
13
14
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX7044 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +25°C
f
RF
= 433MHz
PA 50% DUTY CYCLE AT 10kHz
T
A
= -40°C
T
A
= +85°C
T
A
= +125°C
8
10
14
12
16
18
2.1
2.7
2.4
3.0
3.3
3.6
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX7044 toc05
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
f
RF
= 315MHz
PA ON
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
T
A
= +125°C
8
10
14
12
16
18
2.1
2.7
2.4
3.0
3.3
3.6
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX7044 toc06
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
f
RF
= 433MHz
PA ON
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
T
A
= +125°C
-80
-78
-74
-76
-72
-70
2.1
2.7
2.4
3.0
3.3
3.6
REFERENCE SPUR MAGNITUDE
vs. SUPPLY VOLTAGE
MAX7044 toc07
SUPPLY VOLTAGE (V)
REFERENCE SPUR MAGNITUDE (dBc)
REFERENCE SPUR = f
RF
± f
XTAL
f
RF
= 433MHz
f
RF
= 315MHz
-3
-1
-2
1
0
2
3
2.1
2.7
2.4
3.0
3.3
3.6
FREQUENCY STABILITY
vs. SUPPLY VOLTAGE
MAX7044 toc08
SUPPLY VOLTAGE (V)
FREQUENCY STABILITY (ppm)
f
RF
= 433MHz
f
RF
= 315MHz
30
35
40
45
50
55
60
65
70
2.1
2.4
2.7
3.0
3.3
3.6
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
MAX7044 toc09
SUPPLY VOLTAGE (V)
TRANSMIT POWER EFFICIENCY (%)
f
RF
= 315MHz
PA ON
T
A
= -40°C
T
A
= +85°C
T
A
= +125°C
T
A
= +25°C