Typical operating characteristics (continued) – Rainbow Electronics MAX1479 User Manual
Page 5
MAX1479
300MHz to 450MHz Low-Power,
Crystal-Based +10dBm ASK/FSK Transmitter
_______________________________________________________________________________________
5
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX1479 toc10
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
3.3
3.0
2.7
2.4
6
8
10
12
14
16
4
2.1
3.6
f
RF
= 433MHz
PA ON
T
A
= +25
°C
T
A
= +125
°C
T
A
= +85
°C
T
A
= -40
°C
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX1479 toc11
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
3.3
3.0
2.7
2.4
6
8
10
12
14
16
4
2.1
3.6
f
RF
= 315MHz
PA ON
ENVELOPE SHAPING
DISABLED
T
A
= +25
°C
T
A
= +125
°C
T
A
= +85
°C
T
A
= -40
°C
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX1479 toc12
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
3.3
3.0
2.7
2.4
6
8
10
12
14
16
4
2.1
3.6
f
RF
= 433MHz
PA ON
ENVELOPE SHAPING
DISABLED
T
A
= +25
°C
T
A
= +125
°C
T
A
= +85
°C
T
A
= -40
°C
PHASE NOISE vs. OFFSET FREQUENCY
MAX1479 toc13
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
1M
100k
10k
1k
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-140
100
10M
f
RF
= 315MHz
f
RF
= 433MHz
CLOCK SPUR MAGNITUDE
vs. SUPPLY VOLTAGE
MAX1479 toc14
SUPPLY VOLTAGE (V)
CLKOUT SPUR MAGNITUDE (dBc)
3.3
3.0
2.7
2.4
-65
-60
-55
-50
-45
-40
-70
2.1
3.6
f
RF
= 315MHz
CLKOUT SPUR = f
RF
± f
CLKOUT
10pF LOAD CAPACITANCE
f
CLKOUT
= f
XTAL
/16
f
CLKOUT
= f
XTAL
/4
f
CLKOUT
= f
XTAL
/8
FREQUENCY STABILITY
vs. SUPPLY VOLTAGE
MAX1479 toc15
SUPPLY VOLTAGE (V)
FREQUENCY STABILITY (ppm)
3.3
3.0
2.7
2.4
-8
-6
-4
-2
0
2
4
6
8
10
-10
2.1
3.6
f
RF
= 315MHz
f
RF
= 433MHz
Typical Operating Characteristics (continued)
(Typical Application Circuit, V
DD
= +2.7V, T
A
= +25°C, unless otherwise noted.)
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX1479 toc09
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
3.3
3.0
2.7
2.4
6
8
10
12
14
16
4
2.1
3.6
f
RF
= 315MHz
PA ON
T
A
= +25
°C
T
A
= +125
°C
T
A
= +85
°C
T
A
= -40
°C