MAX2831 查看數據表（PDF） - Maxim Integrated
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MAX2831 Datasheet PDF : 34 Pages
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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: VCC_ = 2.8V, VCCPA = VCCTXPA = 3.3V, TA = +25°C, fRF = 2.439GHz , fLO = 2.437GHz. fREF = 40MHz, SHDN =
RXTX = CS = high, and SCLK = DIN = low, with power matching for the differential RF pins using the typical applications circuit.
100mVRMS sine and cosine signal (or 100mVRMS 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)
CONDITIONS
Off-chip balun + match, single-
end ed
MAX2831
MAX2832
Minimum differential resistance
Maximum differential capacitance
MIN TYP MAX UNITS
-20
dB
-10
20
kΩ
0.7
pF
Baseband -3dB Corner
Frequency
D1:D0 = 01, Register 8
(A3:A0 = 1000)
Nominal mode
11
MHz
Baseband Filter Rejection
At 30MHz, in nominal mode
62
dB
Minimum Power Detector Output Short sequence transmitter power = +9dBm
Voltage
0.3
V
Maximum Power Detector Output Short sequence transmitter power = +19dBm
Voltage
1.2
V
RF Power Detector Response Time
0.3
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
LO Leakage and Sideband
Detector Output
Amplifier Gain Range
Lower -3dB Corner Frequency
Calibration register,
D12:D11 = 00,
A3:A0 = 0110
Output at 1 x fTONE
(for LO leakage = -29dBc),
fTONE = 2MHz, 100mVRMS
Output at 2 x fTONE
(for LO leakage = -240dBc),
fTONE = 2MHz, 100mVRMS
D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110
-34
dBVRMS
-44
30
dB
1
MHz
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