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2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Frequency Synthesis
(MAX2831 EV kit: V CC_ = 2.7V, V CCPA = V CCTXPA = 3.3V, T A = +25°C, f LO = 2.437GHz, f REF = 40MHz, SHDN = CS = high, SCLK =
DIN = low, PLL loop bandwidth = 150kHz, and T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FREQUENCY SYNTHESIZER
RF Channel Center Frequency
Channel Center Frequency
Programming Minimum Step Size
Charge-Pump Comparison
Frequency
Reference Frequency Range
2.4
20
20
20
2.5
44
GHz
Hz
MHz
MHz
Reference Frequency Input
Levels
Reference Frequency Input
Impedance (R || C)
Closed-Loop Phase Noise
Closed-Loop Integrated Phase
Noise
Charge-Pump Output Current
Reference Spurs
AC-coupled to XTAL pin
Resistance (XTAL)
Capacitance (XTAL)
f OFFSET = 1kHz
f OFFSET = 10kHz
f OFFSET = 100kHz
f OFFSET = 1MHz
f OFFSET = 10MHz
RMS phase jitter; integrate from 10kHz to 10MHz offset
20MHz offset
800
5
4
-86
-94
-94
-110
-120
0.9
1
-55
mV P-P
k ?
pF
dBc/Hz
Degrees
mA
dBc
VCO Frequency Error
Measured from Tx-Rx or Rx-Tx
transition
3μs to 9μs
> 9μs
50
1
kHz
VOLTAGE-CONTROLLED OSCILLATOR
Pushing
VCO Tuning Voltage Range
LO Tuning Gain
Referred to 2400MHz LO, V CC varies by 0.3V
V TUNE = 0.5V
V TUNE = 2.2V
0.5
210
103
86
2.2
kHz
V
MHz/V
8
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