Rainbow Electronics MAX7057 - Manual (Page 6)

MAX7057
300MHz to 450MHz Frequency-Programmable
ASK/FSK Transmitter
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(50Ω system impedance, AVDD = DVDD = PAVDD = +2.1V to +3.6V, f RF = 300MHz to 450MHz, T A = -40°C to +125°C, unless other-
wise noted. Typical values are at AVDD = DVDD = PAVDD = +2.7V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT AND OUTPUT POWER
vs. EXTERNAL RESISTOR
MAX7057 toc10
EXTERNAL RESISTOR ( Ω)
SUPPLY CURRENT (mA) OUTPUT POWER (dBm)
1000 100 10 1
2
4
6
8
9
1
3
5
7
0
-15
-10
-5
0
5
10
-25
-20
0.1 10,000
f RF = 315MHz
50% DUTY CYCLE
SUPPLY CURRENT
OUTPUT POWER
SUPPLY CURRENT AND OUTPUT POWER
vs. EXTERNAL RESISTOR
MAX7057 toc11
EXTERNAL RESISTOR ( Ω)
SUPPLY CURRENT (mA) OUTPUT POWER (dBm)
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 = 433.92MHz
PA ON
SUPPLY CURRENT
OUTPUT POWER
SUPPLY CURRENT AND OUTPUT POWER
vs. EXTERNAL RESISTOR
MAX7057 toc12
EXTERNAL RESISTOR ( Ω)
SUPPLY CURRENT (mA) OUTPUT POWER (dBm)
1000 100 10 1
2
4
6
8
9
1
3
5
7
0
-15
-10
-5
0
5
10
-30
-20
0.1 10,000
f RF = 433.92MHz
50% DUTY CYCLE
SUPPLY CURRENT
OUTPUT POWER
-25
MAX7057 toc13
PHASE NOISE vs. OFFSET FREQUENCY
-60
-70
-80
-90
-100
-110
-120
-130
-140
100 10k 100k 1M 10M 1k
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
f RF = 315MHz
-50
-60
-70
-80
-90
-100
-110
-120
-130
100 10k 100k 1M 10M 1k
PHASE NOISE vs. OFFSET FREQUENCY
MAX7057 toc14
OFFSET FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
f RF = 433.92MHz
-60
-50
-55
-40
-45
-35
-30
2.1 3.6
REFERENCE SPUR MAGNITUDE
vs. SUPPLY VOLTAGE
MAX7057 toc15
SUPPLY VOLTAGE (V)
REFERENCE SPUR MAGNITUDE (dBc)
2.7 2.4 3.0 3.3
f RF = 433.92MHz
f RF = 315MHz