
MAX2830
2.4GHz to 2.5GHz 802.11g/b RF Transceiver, PA,
and Rx/Tx/Antenna Diversity Switch
Typical Operating Characteristics (continued)
(MAX2830 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.)
Tx GAIN VARIATION vs. FREQUENCY
(B6:B1 = 101001)
18.0
Tx OUTPUT POWER vs. FREQUENCY
TRANSMIT EMISSION MASK
T A = -40 ° C
17.5
GAIN ADJUSTED TO ACHIEVE 5.6% EVM
P OUT = +17.1dBm
EVM = 5.6%
T A = +25 ° C
17.0
T A = +85 ° C
T A = +25 ° C
16.5
T A = +85 ° C
16.0
15.5
15.0
T A = -40 ° C
2.4
2.42
2.44 2.46
2.48
2.5
2.40
2.42
2.44 2.46
2.48
2.50
2387
2407
2427
2447
2467
2487
22
FREQUENCY (GHz)
802.11g P OUT vs. GAIN SETTING
(UPPER GAIN CONTROL RANGE)
2.5
FREQUENCY (GHz)
POWER DETECTOR OVER FREQUENCY
2.0
FREQUENCY/MHz
POWER DETECTOR OVER SUPPLY VOLTAGE
V CCPA = 2.7V, 3.0V
20
2.0
f RF = 2.4GHz
1.5
1.5
18
1.0
1.0
16
14
0.5
0
f RF = 2.5GHz
0.5
0
V CCPA = 3.3V, 4.2V
40
44
48 52 56
60
64
0
5
10 15
20
25
0
5
10 15
20
25
2.5
GAIN SETTINGS
POWER DETECTOR OVER TEMPERATURE
P OUT (dBm)
POWER-DETECTOR OUTPUT
P OUT (dBm)
PA OUTPUT ENVELOPE RESPONSE
300mV
20dB GAIN STE P
PA ENVELOPE
50mV
2.0
1.5
1.0
T A = +85 ° C
T A = +25 ° C,
-40 ° C
-300mV
1V
-50mV
20dBm
TX I/Q INPUT
0.5
0V
POWER DETECTOR
0
-20dBm
PA ENVELOPE
0
0
5
10 15
20
25
100ns/div
1 μ s/div
P OUT (dBm)
Maxim Integrated
15