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2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Tx Mode (continued)
(MAX2831 EV kit: V CC_ = 2.8V, V CCPA = V CCTXPA = 3.3V, T A = +25°C, f RF = 2.439GHz , f LO = 2.437GHz. f REF = 40MHz, SHDN =
RXTX = CS = high, and SCLK = DIN = low, with power matching for the differential RF pins using the typical applications circuit.
100mV RMS sine and cosine signal (or 100mV RMS 54Mbps IEEE 802.11g I/Q signals wherever OFDM is mentioned) applied to base-
band I/Q inputs of transmitter (differential DC-coupled). Registers set to recommend settings and corresponding test mode, unless
otherwise noted. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB, balun,
and SMA connectors.) (Note 1)
PARAMETER
RF Output Return Loss
Tx I/Q Input Load Impedance
(R || C)
Baseband -3dB Corner
Frequency
CONDITIONS
Off-chip balun + match, single-
ended
Minimum differential resistance
Maximum differential capacitance
D1:D0 = 01, Register 8
(A3:A0 = 1000)
MAX2831
MAX2832
Nominal mode
MIN
TYP
-20
-10
20
0.7
11
MAX
UNITS
dB
k ?
pF
MHz
Baseband Filter Rejection
Minimum Power Detector Output
Voltage
Maximum Power Detector Output
Voltage
RF Power Detector Response Time
At 30MHz, in nominal mode
Short sequence transmitter power = +9dBm
Short sequence transmitter power = +19dBm
62
0.3
1.2
0.3
dB
V
V
μs
TRANSMITTER LO LEAKAGE AND I/Q CALIBRATION USING LO LEAKAGE AND SIDEBAND DETECTOR (see the Tx/Rx
Calibration Mode section)
Tx BASEBAND I/Q INPUTS TO RECEIVER OUTPUTS
Output at 1 x f TONE
LO Leakage and Sideband
Detector Output
Calibration register,
D12:D11 = 00,
A3:A0 = 0110
(for LO leakage = -29dBc),
f TONE = 2MHz, 100mV RMS
Output at 2 x f TONE
(for LO leakage = -240dBc),
-34
-44
dBV RMS
f TONE = 2MHz, 100mV RMS
Amplifier Gain Range
Lower -3dB Corner Frequency
D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110
30
1
dB
MHz
_______________________________________________________________________________________
7
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