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2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
Typical Operating Characteristics (continued)
(MAX2831 EV kit, V CC_ = 2.8V, V CCPA = V CCTXPA = 3.3V, T A = +25°C, f LO = 2.437GHz, f REF = 40MHz, SHDN = CS = high, RXHP =
SCLK = DIN = low.)
2.0
1.8
POWER DETECTOR OVER FREQUENCY
2.0
1.8
POWER DETECTOR OVER SUPPLY VOLTAGE
2.0
1.8
POWER DETECTOR OVER TEMPERATURE
1.6
f RF = 2.4GHz
1.6
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
f RF = 2.5GHz
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V CCPA = 2.7V, 3.0V
V CCPA = 3.3V, 4.2V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
T A = +85°C
T A = -40 ° C,
+25 ° C
0
2
4
6 8 10 12 14 16 18 20 22
0
2
4
6 8 10 12 14 16 18 20 22
0
2
4
6
8 10 12 14 16 18 20 22
OUTPUT POWER (dBm)
POWER-DETECTOR OUTPUT
OUTPUT POWER (dBm)
PA OUTPUT ENVELOPE RESPONSE
P OUT (dBm)
PA OUTPUT POWER HISTORGRAM
FOR 1.1V POWER DETECTOR OUTPUT
300mV
20dB GAIN STE P
PA ENVELOPE
50mV
12
10
MEAN = 18.5dBm
-50mV
8
-300mV
1V
POWER DETECTOR
20dBm
0
TX I/Q INPUT
6
4
0V
-20dBm
PA ENVELOPE
2
0
100ns/div
-10
-15
-20
-25
PA OUTPUT RETURN LOSS
vs. RF FREQUENCY
1 μ s/div
10
0
-10
-20
-30
-40
-50
-60
-70
-80
0.1dB/div
Tx OUTPUT SPURS
MAX2831/32 toc52
RBW = 1MHz
802.11g SIGNAL
-30
2300
2350
2400 2450 2500
2550
2600
-90
DC
26.5GHz
RF FREQUENCY (MHz)
16
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