Datasheet

MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
_______________________________________________________________________________________ 7
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 CONDITIONS MIN TYP MAX UNITS
MAX2831 -20
RF Output Return Loss
O ff- chi p b al un + m atch, si ng l e-
end ed
MAX2832 -10
dB
Minimum differential resistance 20 kΩ
Tx I/Q Input Load Impedance
(R || C)
Maximum differential capacitance 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
Voltage
Short sequence transmitter power = +9dBm 0.3 V
Maximum Power Detector Output
Voltage
Short sequence transmitter power = +19dBm 1.2 V
RF P ow er D etector Resp onse Ti m e 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
Output at 1 x f
TONE
(for LO leakage = -29dBc),
f
TONE
= 2MHz, 100mV
RMS
-34
LO Leakage and Sideband
Detector Output
Calibration register,
D12:D11 = 00,
A3:A0 = 0110
Output at 2 x f
TONE
(for LO leakage = -240dBc),
f
TONE
= 2MHz, 100mV
RMS
-44
d BV
RM S
Amplifier Gain Range D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110 30 dB
Lower -3dB Corner Frequency 1 MHz