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2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS—Tx MODE
(MAX2839AS Evaluation Kit. Unless otherwise noted, V CC_ = 2.8V, T A = +25°C, f RF = 2.501GHz, f LO = 2.5GHz, f REF = 40MHz,
ENABLE = CS = high, TXRX = SCLK = DIN = low, with power matching for the differential RF pins using the Typical Operating Circuit
and registers set to default settings. Lowpass filter is set to 10MHz RF channel BW. 1MHz 90mV RMS cosine and sine signals applied
to I/Q baseband inputs of transmitter (differential DC-coupled)). (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Tx BASEBAND I/Q INPUTS TO R F OUTPUTS
RF Output Frequency Range
Peak-to-Peak Peak Gain Variation
over RF Band
2.3
1
2.7
2
GHz
dB
Total Voltage Gain
Max Output Power over
Frequency
RF Output Return Loss
RF Gain Control Range
Unwanted Sideband Suppression
Max gain - 3dB; at unbalanced 50 ? matched output
64 QAM OFDM signal conforming to spectral emission
mask and -36dB EVM after I/Q imbalance calibration by
modem (Note 5)
B6:B1 = 000000 to 111111
Without calibration by modem, and excludes modem I/Q
imbalance; P OUT = 0dBm
3.5
8
0
8
62
40
dB
dBm
dB
dB
dB
B1
B2
1
2
RF Gain Control Binary Weights
Carrier Leakage
Tx I/Q Input Impedance (R||C)
Baseband Frequency Response
for 5MHz RF Channel BW
Baseband Frequency Response
for 10MHz RF Channel BW
Baseband Group Delay Ripple
B3
B4
B5
B6
Relative to 0dBm output power; without calibration by
modem
Differential resistance
Differential capacitance
0 to 3.333MHz
At > 9.45MHz
0 to 6.667MHz
At > 18.9MHz
0 to 3.333MHz (RF BW = 5MHz)
0 to 6.667MHz (RF BW = 10MHz)
4
8
16
32
-30
100
0.5
0.9
43
0.9
43
20
12
dB
dBc
k ?
pF
dB
dB
ns
6
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