Datasheet

MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
16 ______________________________________________________________________________________
POWER DETECTOR OVER FREQUENCY
OUTPUT POWER (dBm)
POWER DETECTOR (V)
MAX2831/32 toc45
0 2 4 6 8 10 12 14 16 18 20 22
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
f
RF
= 2.4GHz
f
RF
= 2.5GHz
POWER DETECTOR OVER SUPPLY VOLTAGE
OUTPUT POWER (dBm)
POWER DETECTOR (V)
MAX2831/32 toc46
0 2 4 6 8 10 12 14 16 18 20 22
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
V
CCPA
= 2.7V, 3.0V
V
CCPA
= 3.3V, 4.2V
0
6
4
2
8
10
12
PA OUTPUT POWER HISTORGRAM
FOR 1.1V POWER DETECTOR OUTPUT
MAX2831/32 toc50
0.1dB/div
MEAN = 18.5dBm
PA OUTPUT ENVELOPE RESPONSE
1µs/div
MAX2831/32 toc49
-20dBm
0
20dBm
-50mV
50mV
PA ENVELOPE
TX I/Q INPUT
Tx OUTPUT SPURS
MAX2831/32 toc52
0
-80
-90
10
-70
-60
-50
-40
-30
-20
-10
26.5GHzDC
RF
VCO
2x RF
2x VCO
3x RF
4x RF
RBW = 1MHz
802.11g SIGNAL
POWER-DETECTOR OUTPUT
100ns/div
MAX2831/32 toc48
300mV
-300mV
0V
1V
20dB GAIN STEP
PA ENVELOPE
POWER DETECTOR
POWER DETECTOR OVER TEMPERATURE
P
OUT
(dBm)
POWER DETECTOR (V)
MAX2831/32 toc47
0 2 4 6 8 10 12 14 16 18 20 22
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
T
A
= +85°C
T
A
= -40°C,
+25°C
PA OUTPUT RETURN LOSS
vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT RETURN LOSS (dB)
MAX2831/32 toc51
2300 2350 2400 2450 2500 2550 2600
-30
-25
-20
-15
-10
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.)