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2.3GHz to 2.7GHz MIMO Wireless
BroadbandRF Transceiver
AC ELECTRICAL CHARACTERISTICS—FREQUENCY SYNTHESIS
(MAX2839AS Evaluation Kit. Unless otherwise noted, V CC_ = 2.8V, T A = +25°C, f LO = 2.5GHz, f REF = 40MHz, CS = high, SCLK = DIN
= low, PLL closed-loop unity gain bandwidth = 120kHz. VCO and RF synthesis enabled.) (Note 2)
PARAMETER
RF Channel Center Frequency
Range
CONDITIONS
MIN
2.3
TYP
MAX
2.7
UNITS
GHz
Channel Center Frequency
Programming Minimum Step Size
Charge-Pump Comparison
Frequency
28.61
40
Hz
MHz
Reference Frequency Range
15
40
80
MHz
Reference Frequency Input
Levels
Reference Frequency Input
Impedance (R||C)
AC-coupled to REFCLK pin
Resistance (REFCLK pin)
Capacitance (REFCLK pin)
0.6
10
1
V P-P
k ?
pF
Programmable Reference Divider
Values
Closed-Loop Integrated Phase
Noise
Charge-Pump Output Current
Close-In Spur Level
Reference Spur Level
Integrate phase noise from 200Hz to 5MHz; charge-
pump comparison frequency = 40MHz
On each differential side
f OFFSET = 0 to 1.8MHz
f OFFSET = 1.8MHz to 7MHz
f OFFSET > 7MHz
1
2
-39
0.8
-40
-70
-80
-85
4
dBc
mA
dBc
dBc
Relative to steady state; measured 35μs after Tx-Rx or
Turnaround LO Frequency Error
Rx-Tx switching instant, and 4μs after any receiver gain
±50
Hz
changes
Temperature Range Over Which
VCO Maintains Lock
Reference Output Clock Divider
Values
Output Clock Drive Level
Output Clock Load Impedance
(R||C)
Relative to the ambient temperature T A at initial lock
CLKOUT_DIV pin = 0
CLKOUT_DIV pin = 1
20MHz output, A[4:0] = 10100, D5 = 0
Resistance
Capacitance
T A ±40
1
2
2.4
10
2
°C
V P-P
k ?
pF
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