
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.)
EVM vs. Tx OUTPUT POWER
(MAX2832 ONLY)
11g SPECTRAL MASK
(MAX2832 ONLY)
Tx OUTPUT SPURS
(MAX2832 ONLY)
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
-9
-19
-29
-39
-49
-59
-69
-79
-89
-99
P OUT = -2.17dBm
EVM = 2.12%
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
MAX2831/32 toc38
RBW = 1MHz
802.11g SIGNAL
1.00
-30
-24
-18 -12 -6
0
-109
2387
2407
2427
2447
2467
2487
-110
DC
26.5GHz
OUTPUT POWER (dBm)
FREQUENCY (MHz)
Tx GAIN VARIATION vs. FREQUENCY
Tx EVM vs. P OUT
PA SUPPLY CURRENT vs. P OUT
(B6:B1 = 101001)
8
V CCPA = 4.2V
280
T A = -40°C
7
V CCPA = 3.3V
250
6
5
4
3
V CCPA = 3.0V
V CCPA = 2.7V
220
190
160
V CCPA = 4.2V
T A = +85°C
T A = +25°C
2
0
2
4
6
8 10 12 14 16 18 20 22
130
0
2
4
6
V CCPA = 2.7V, 3.0V, 3.3V
8 10 12 14 16 18 20 22 24
2.40
2.42
2.44 2.46
2.48
2.50
20
P OUT (dBm)
Tx OUTPUT POWER vs. FREQUENCY
-9
P OUT (dBm)
11g SPECTRAL MASK
22
FREQUENCY (GHz)
802.11g P OUT vs. GAIN SETTING
(UPPER GAIN CONTROL RANGE)
GAIN ADJUSTED TO ACHIEVE 5.6% EVM
-19
P OUT = 18.64dBm
EVM = 5.6%
19
18
T A = +25°C
-29
-39
-49
-59
-69
20
18
16
-79
17
-89
14
T A = +85°C
T A = -40°C
-99
16
-109
12
2.40
2.42
2.44 2.46
2.48
2.50
2387
2407
2427
2447
2467
2487
40
44
48 52 56
60
64
FREQUENCY (GHz)
FREQUENCY (MHz)
GAIN SETTINGS
______________________________________________________________________________________
15