2.3GHz to 2.7GHz Wireless
Broadband RF Transceiver
Typical Operating Characteristics
(MAX2837 evaluation kit: V CC_ = 2.8V, f LO = 2.5GHz, 10MHz channel 16E UL/DL WiMax signal, f REF = 40MHz, ENABLE =
CS = high, RXHP = SCLK = DIN = low, T A = +25°C, unless otherwise noted.)
NOISE FIGURE
Rx VOLTAGE GAIN
97
Rx CURRENT vs. SUPPLY VOLTAGE
40
vs. BASEBAND VGA GAIN SETTING
100
vs. BASEBAND GAIN SETTING
95
T A = +85°C
35
LNA = MAX - 32dB
80
LNA = MAX - 8dB
30
LNA = MAX
93
91
T A = -40°C
T A = +25°C
25
20
LNA = MAX - 16d B
60
89
87
15
10
5
LNA = MAX
LNA = MAX - 8dB
40
20
LNA = MAX - 16dB
LNA = MAX - 32d B
85
0
0
2.7
3.0 3.3
3.6
0
8
16 24
32
0
8
16 24
32
SUPPLY VOLTAGE (V)
Rx VOLTAGE GAIN VARIATION vs. RF FREQUENCY
2
1.5
1.2
BASEBAND VGA CODE
Rx IN-BAND OUTPUT V1dB
vs. BASEBAND GAIN SETTING
22
20
18
BASEBAND VGA CODE
Rx EVM vs. P IN
1
LNA = MAX - 32dB
0.9
16
14
0
0.6
12
10
8
-1
LNA = MAX
LNA = MAX - 8dB
LNA = MAX - 16dB
0.3
6
4
2
LNA = MAX
-2
2.3
2.4 2.5 2.6
2.7
0
0
8
16 24
32
0
-90 -80 -70 -60 -50 -40 -30 -20 -10
0
RF FREQUENCY (GHz)
WiMAX EVM WITH OFDM JAMMER
vs. OFFSET FREQUENCY
15
BASEBAND VGA CODE
-50
P IN (dBm)
Rx EMISSION SPECTRUM AT LNA INPUT
14
13
12
11
10
9
8
7
6
5
4
3
P IN = -60dBm
f OFFSET = 10MHz
-60
-70
-80
-90
-100
-110
-120
-130
2
1
0
f OFFSET = 20MHz
-140
-150
MIN LNA GAIN
RBW = 300kHz
-65
-55
-45
-35
-25
DC
26.5GHz
P JAMMER (dBm)
10
______________________________________________________________________________________
相关PDF资料
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