5GHz, 4-Channel MIMO Transmitter
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Typical Operating Characteristics (continued)
(V
CC
= 2.8V, f
LO
= 5.35GHz, f
REF
= 40MHz, CS = high, SCLK = DIN = low, RF BW = 20MHz, Tx output at 50I unbalanced output of
balun, T
A
= +25NC, using the MAX2850 Evaluation Kit.)
Rx LNA SETTLING RESPONSE
(MAX - 16dB TO MAX GAIN STEP)
MAX2850 toc37
0.1V/div
0V
100ns/div
Rx BASEBAND
OUTPUT
D: 130mv
@: 132mv
GAIN-CONTROL
TOGGLE
CH1 RMS: 176mV
Rx LNA SETTLING RESPONSE
(MAX - 24dB TO MAX GAIN STEP)
MAX2850 toc38
0.1V/div
0V
100ns/div
Rx BASEBAND
OUTPUT
D: 130mv
@: 132mv
CH1 RMS: 174mV
GAIN-CONTROL
TOGGLE
Rx LNA SETTLING RESPONSE
(MAX - 32dB TO MAX GAIN STEP)
MAX2850 toc39
0.1V/div
0V
200ns/div
Rx BASEBAND
OUTPUT
D: 130mv
@: 132mv
CH1 RMS: 155mV
GAIN-CONTROL
TOGGLE
Rx LNA SETTLING RESPONSE
(MAX - 40dB TO MAX GAIN STEP)
MAX2850 toc40
0.1V/div
0V
200ns/div
Rx BASEBAND
OUTPUT
D: 130mv
@: 132mv
CH1 RMS: 154mV
GAIN-CONTROL
TOGGLE
HISTOGRAM: Rx I/Q GAIN IMBALANCE
SAMPLES = 3413, AVG = -0.015dB,
STDEV = 0.042dB
MAX2850 toc41
-800.00m
800.00m
0
648
540
432
324
216
108
0
HISTOGRAM: Rx I/Q PHASE IMBALANCE
SAMPLES = 3413, AVG = -0.15deg,
STDEV = 0.18deg
MAX2850 toc42
180
150
120
90
60
30
0
-2.0000
0
2.0000
HISTOGRAM: Rx STATIC DC OFFSET
SAMPLES = 3413, AVG = -0.5mV,
STDEV = 2.14mV
MAX2850 toc43
132
110
88
66
44
0
22
-15.000m
0
15.000m
POWER-ON DC OFFSET CANCELLATION
WITH INPUT SIGNAL
MAX2850 toc44
2V/div
0.1V/div
0V
0V
1祍/div
Rx ENABLE
ENGAGE 600kHz
HIGHPASS CORNER
D: 2.14祍
@: 2.12祍
D: 112mV
@: 104mV
Rx BASEBAND OUTPUT
POWER-ON DC OFFSET CANCELLATION
WITHOUT INPUT SIGNAL
MAX2850 toc45
50mV/div
RXBB_I
500mV/div
RXBB_Q
400ns/div
Rx ENABLE
TURN-ON
TRANSIENT