5GHz, 4-Channel MIMO Transmitter
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AC ELECTRICAL CHARACTERISTICSRx MODE (continued)
(Operating conditions, unless otherwise specified: V
CC
= 2.7V~3.6V, RF frequency = 5.351GHz, T
A
= -25NC to +85NC. LO frequency
= 5.35GHz. Reference frequency = 40MHz, ENABLE = high, CS = high, SCLK = DIN = low, with power matching at RXRF+ and
RXRF- differential ports using the Typical Operating Circuit. Receiver I/Q output at 100mV
RMS
loaded with 10kI differential load
resistance and 10pF load capacitance. The RSSI pin is loaded with 10kI load resistance to ground. Typical values measured at V
CC
= 2.85V, channel bandwidths of 40MHz, T
A
= +25NC.) (Note 1)
AC ELECTRICAL CHARACTERISTICSTx MODE
(Operating conditions, unless otherwise specified: V
CC
= 2.7V~3.6V, RF frequency = 5.351GHz, T
A
= -25NC to +85NC. LO frequency
= 5.35GHz. Reference frequency = 40MHz, ENABLE = high, CS = high, SCLK = DIN = low, with power matching at TXRF+ and
TXRF- differential ports using the Typical Operating Circuit. 100mV
RMS
sine and cosine signal applied to I/Q baseband inputs of
transmitter (differential DC-coupled). Typical values measured at V
CC
= 2.85V, channel bandwidths of 40MHz, T
A
= +25NC.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Baseband -3dB Lowpass Corner
Frequency
Main address 0 D1 = 0
9.5
MHz
Main address 0 D1 = 1
19
Baseband Filter Stopband
Rejection
Rejection at 30MHz offset frequency for 20MHz channel
57
70
dB
Rejection at 60MHz offset frequency for 40MHz channel
57
70
Baseband -3dB Highpass Corner
Frequency
Main address 5 D1 = 1
600
kHz
Main address 5 D1 = 0
10
Steady-State I/Q Output DC Error
with AC-Coupling
50Fs after enabling receive mode and toggling RxHP
from 1 to 0, averaged over many measurements if I/Q
noise voltage exceeds 1mV
RMS
, at any given gain set-
ting, no input signal, 1-sigma value
2
mV
I/Q Gain Imbalance
1MHz baseband output, 1-sigma value
0.1
dB
I/Q Phase Imbalance
1MHz baseband output, 1-sigma value
0.2
degrees
Sideband Suppression
1MHz baseband output (Note 2)
40
dB
Receiver Spurious Signal
Emissions
LO frequency
-75
dBm/
MHz
2 x LO frequency
-62
3 x LO frequency
-75
4 x LO frequency
-60
RF RSSI Output Voltage
-20dBm input power
1.75
V
Baseband RSSI Slope
19.5
26.5
35.5
mV/dB
Baseband RSSI Maximum Output
Voltage
2.3
V
Baseband RSSI Minimum Output
Voltage
0.5
V
RF Loopback Conversion Gain
Tx VGA gain at maximum (Main address 9 D9:D4
= 111111); Rx VGA gain at maximum - 24dB (Main
address 1 D3:D0 = 0101)
-6
+2
+10
dB
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS (Includes Matching and Balun Loss)
RF Output Frequency Range
4.9
5.9
GHz
Peak-to-Peak Gain Variation over
RF Band
At one temperature
3
6.4
dB