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2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)
(MAX2839AS Evaluation Kit. Unless otherwise noted, V CC_ = 2.8V, T A = +25°C, f RF = 2.4999GHz, f LO = 2.5GHz; baseband output
signal frequency = 100kHz, f REF = 40MHz, ENABLE = TXRX = CS = high, 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.
Unmodulated single-tone RF input signal is used.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Out-of-Band Input IP3 (Note 4)
AGC set for -65dBm wanted signal, max RF gain
(B7:B6 = 00)
AGC set for -55dBm wanted signal, max RF gain - 8dB
(B7:B6 = 01)
AGC set for -40dBm wanted signal, max RF gain - 16dB
(B7:B6 = 10)
AGC set for -30dBm wanted signal, max RF gain - 32dB
(B7:B6 = 11)
Max RF gain (B7:B6 = 00)
-13
-9
-7
+16
-37
dBm
Inband Input P-1dB
Maximum Output Signal Level
I/Q Gain Imbalance
I/Q Phase Error
Rx I/Q Output Load Impedance
(R || C)
Max RF gain - 8dB (B7:B6 = 01)
Max RF gain - 16dB (B7:B6 = 01)
Max RF gain - 32dB (B7:B6 = 11)
Over passband frequency range at VGA gain between
max and max - 54dB; 1dB compression point
100kHz IQ baseband output; 1 σ variation
100kHz IQ baseband output; 1 σ variation
Minimum differential resistance
Maximum differential capacitance
10
-29
-21
-4
1.15
0.05
0.25
5
dBm
V P-P
dB
Degrees
k ?
pF
Loopback Gain (for Receiver I/Q
Calibration)
Transmitter I/Q input to receiver I/Q output; transmitter
B6:B1 = 000011, receiver B5:B0 = 101010 programmed
through SPI
-6
-1
+4.5
dB
After switching RXHP to 0; average over 1μs after any
I/Q Output DC Droop
gain change, or 2μs after receive enabled with 100Hz
1
V/s
AC-coupling
I/Q Static DC Offset
Isolation Between Rx Channels A
and B
No RF input signal; measure at 3μs after receive enable;
RXHP = 1 for 0 to 2μs and set to 0 after 2μs, 1 σ variation
Any RF gain settings
1
40
mV
dB
RECEIVER BASEBAND FILTERS
At 15MHz
57
Baseband Filter Rejection
At 20MHz
At > 40MHz
RXHP = 1 (used before AGC completion)
D[5:4] = 00
75
75
650
0.1
dB
Baseband Highpass Filter Corner
Frequency
RXHP = 0 (used after AGC
completion) address A[4:0] = 01110
D[5:4] = 01
D[5:4] = 10
1
30
kHz
D[5:4] = 11
100
4
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