MAX7044(2004) 데이터 시트보기 (PDF) - Maxim Integrated
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MAX7044
(Rev.:2004)
(Rev.:2004)
Maxim Integrated
MAX7044 Datasheet PDF : 9 Pages
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300MHz to 450MHz High-Efficiency,
Crystal-Based +13dBm ASK Transmitter
Typical Operating Characteristics (continued)
(Typical Application Circuit, VDD = +2.7V, TA = +25°C, unless otherwise noted.) (Note 1)
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
60
fRF = 315MHz
55 PA 50% DUTY CYCLE AT 10kHz
50
TA = -40°C
TA = +25°C
45
40
35
TA = +85°C
30
25
TA = +125°C
20
2.1 2.4 2.7 3.0 3.3 3.6
SUPPLY VOLTAGE (V)
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
70
fRF = 433MHz
65 PA ON
TA = -40°C
60
TA = +25°C
55
50
45
TA = +85°C
40
TA = +125°C
35
30
2.1 2.4 2.7 3.0 3.3 3.6
SUPPLY VOLTAGE (V)
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
60
fRF = 433MHz
TA = +25°C
55 PA 50% DUTY CYCLE AT 10kHz
50 TA = -40°C
45
40
35
TA = +85°C
30
25
TA = +125°C
20
15
2.1 2.4 2.7 3.0 3.3 3.6
SUPPLY VOLTAGE (V)
PHASE NOISE vs. OFFSET FREQUENCY
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
0.01 0.1 1 10 100 1k 10k
OFFSET FREQUENCY (Hz)
FREQUENCY SETTLING TIME
SUPPLY CURRENT AND OUTPUT POWER
vs. EXTERNAL RESISTOR
18
16 MAX7044 toc14
16
POWER
12
14
8
12
CURRENT
4
10
0
8
-4
6
-8
4 fRF = 315MHz
PA ON
2
0
1
10
100 1000
EXTERNAL RESISTOR (Ω)
-12
-16
10,000
AM DEMODULATION OF PA OUTPUT
DATA RATE = 100kHz
SUPPLY CURRENT vs. OUTPUT POWER
18
fRF = 315MHz
15
12
PA ON
9
6
3
50% DUTY CYCLE
0
-10 -6 -2 2 6 10 14
OUTPUT POWER (dBm)
OUTPUT SPECTRUM
50kHz/div
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