Datasheet

MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
______________________________________________________________________________________ 15
11g SPECTRAL MASK
(MAX2832 ONLY)
FREQUENCY (MHz)
246724472407 2427
-99
-89
-79
-69
dBm
-59
-49
-39
-29
-19
-9
-109
2387 2487
MAX2831/32 toc37
P
OUT
= -2.17dBm
EVM = 2.12%
PA SUPPLY CURRENT vs. P
OUT
P
OUT
(dBm)
PA SUPPLY CURRENT (mA)
MAX2831/32 toc40
02468101214161820 2422
130
160
190
220
250
280
V
CCPA
= 2.7V, 3.0V, 3.3V
V
CCPA
= 4.2V
Tx GAIN VARIATION vs. FREQUENCY
(B6:B1 = 101001)
FREQUENCY (GHz)
1dB/div
MAX2831/32 toc41
2.40 2.42 2.44 2.46 2.48 2.50
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
Tx OUTPUT POWER vs. FREQUENCY
FREQUENCY (GHz)
P
OUT
(dBm)
MAX2831/32 toc42
2.40 2.42 2.44 2.46 2.48 2.50
16
17
18
19
20
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
GAIN ADJUSTED TO ACHIEVE 5.6% EVM
11g SPECTRAL MASK
FREQUENCY (MHz)
P
OUT
= 18.64dBm
EVM = 5.6%
246724472407 2427
-99
-89
-79
-69
-59
-49
dBm
-39
-29
-19
-9
-109
2387 2487
MAX2831/32 toc43
-80
-90
-10
-70
-60
-50
-40
dBm
-30
-20
-100
-110
Tx OUTPUT SPURS
(MAX2832 ONLY)
MAX2831/32 toc38
DC 26.5GHz
RF
VCO
2x RF
2x VCO
3x VCO
4x VCO
RBW = 1MHz
802.11g SIGNAL
Tx EVM vs. P
OUT
P
OUT
(dBm)
EVM (%)
MAX2831/32 toc39a
0246810121416182022
2
3
4
5
6
7
8
V
CCPA
= 2.7V
V
CCPA
= 3.0V
V
CCPA
= 3.3V
V
CCPA
= 4.2V
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)
OUTPUT POWER (dBm)
EVM (%)
MAX2831/32 toc36a
-30 -24 -18 -12 -6 0
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
802.11g P
OUT
vs. GAIN SETTING
(UPPER GAIN CONTROL RANGE)
GAIN SETTINGS
P
OUT
(dBm)
MAX2831/32 toc44
40 44 48 52 56 60 64
12
14
16
18
20
22