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2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
AC ELECTRICAL CHARACTERISTICS TABLE—FREQUENCY SYNTHESIS
(MAX2839 Evaluation Kit, V CC_ = 2.8V, T A = +25°C, f LO = 2.5GHz, f REF = 40MHz, CS = high, SCLK = DIN = low, PLL 3dB loop noise
bandwidth = 120kHz. VCO and RF synthesis enabled, unless otherwise noted.) (Note 1)
PARAMETER
RF Channel Center Frequency
Range
CONDITIONS
MIN
2.3
TYP
MAX
2.7
UNITS
GHz
Channel Center Frequency
Programming Minimum Step Size
39
Hz
Charge-Pump Comparison
Frequency
11
40
MHz
Reference Frequency Range
11
40
80
MHz
Reference Frequency Input
Levels
Reference Frequency Input
Impedance (R||C)
AC-coupled to REFCLK pin
Resistance (REFCLK pin)
Capacitance (REFCLK pin)
0.8
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 , as long as the
VCO lock temperature range is within operating
temperature range
20MHz output, 1x drive setting
Resistance
Capacitance
T A ±40
2
1.5
10
2
°C
V P-P
k
pF
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