
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS — Frequency Synthesis
(MAX2828/MAX2829 evaluation kits: V CC = +2.7V, f RF = 2.437GHz (802.11g) or f RF = 5.25GHz (802.11a), f REFOSC = 40MHz, SHDN =
CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, R BIAS = 11k ? , T A = +25 ° C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FREQUENCY SYNTHESIZER
802.11g mode
2412
2500
RF Channel Center Frequency
802.11a low-band mode
4900
5350
MHz
Charge-Pump Comparison
Frequency
802.11a high-band mode
5470
20
5875
MHz
f REFOSC Input Frequency
Reference-Divider Ratio
20
1
44
4
MHz
f REFOSC Input Levels
f REFOSC Input Impedance
AC-coupled
802.11g
f OFFSET = 1kHz
f OFFSET = 10kHz
f OFFSET = 100kHz
f OFFSET = 1MHz
800
10
-87
-103
-99
-112
mV P-P
k ?
Closed-Loop Phase Noise
802.11a
f OFFSET = 10MHz
f OFFSET = 1kHz
f OFFSET = 10kHz
f OFFSET = 100kHz
f OFFSET = 1MHz
f OFFSET = 10MHz
-125
-84
-95
-92
-108
-124
dBc/Hz
Closed-Loop Integrated Phase
Noise
Charge-Pump Output Current
Charge-Pump Output Voltage
Reference Spurs
RMS phase jitter,
integrate from 10kHz
to 10MHz offset
>70% of I CP
20MHz offset
802.11g
802.11a
802.11g
802.11a
0.5
0.6
1
4
-65
-58
V CC - 0.5V
degrees
mA
V
dBc
VOLTAGE-CONTROLLED OSCILLATOR
VCO Tuning Voltage Range
802.11g
V TUNE = 0.4V
V TUNE = 2.3V
0.4
135
62
2.3
V
LO Tuning Gain
802.11a
Low band
High band
V TUNE = 0.3V
V TUNE = 2.2V
V TUNE = 0.3V
V TUNE = 2.2V
324
167
330
175
MHz/V
Maxim Integrated
11