Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11a Tx Mode (MAX2828/MAX2829)
(MAX2828/MAX2829 evaluation kits: V
CC
= +2.7V, f
OUT
= 5.25GHz, f
REFOSC
= 40MHz, SHDN = TXENA = CS = high, RXENA = SCLK
= DIN = low, R
BIAS
= 11kΩ, 100mV
RMS
sine and cosine signal (or 100mV
RMS
, 54Mbps IEEE 802.11a I/Q signals wherever OFDM is
mentioned) applied to baseband I/Q inputs of transmitter, registers set to default settings and corresponding test mode, T
A
= +25°C,
unless otherwise noted.) (Table 4)
MIN
MAX
TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS
802.11a low-band mode
4.900 5.350
RF Output Frequency Range, f
RF
5.470 5.875
2% EVM -5
Output Power
54Mbps 802.11a OFDM
signal
B6:B1 = 111100 -6.5
Output Power (CW)
V
IN
= 100mV
RMS
at 1MHz I/Q CW signal, B6:B1 =
111111
-4.5
f
RF
= 4.9GHz -6
f
RF
= 5.35GHz -0.5
Output Power Variation Relative
to 5.25GHz
f
RF
= 5.875GHz -1
dB
Output Power Range B6:B1 = 111111 to B6:B1 = 000000 30 dB
Carrier Leakage Without DC offset cancellation -27
Unwanted Sideband Suppression
Uncalibrated -51 dBc
Tx Output ACP
Measured with 1MHz resolution bandwidth at 30MHz
offset from channel center (B6:B1 = 111100), OFDM
signal
-80
RF Output Return Loss With external 50Ω match -16 dB
4/5 x f
RF
-55
6/5 x f
RF
-64
7/5 x f
RF
-65
RF Spurious Signal Emissions
B6:B1 = 111100,
OFDM signal
8/5 x f
RF
-49
Nominal mode 12
Turbo mode 1 18
Baseband -3dB Corner
Frequency
(see the Lowpass
Filter Register
Definition section)
Turbo mode 2 24
Baseband Filter Rejection
At 30MHz, in nominal mode (see the Lowpass Filter
Register Definition section)
60 dB
Minimum differential resistance 60 kΩ
Tx Baseband Input Impedance
Maximum differential capacitance 0.7 pF
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
-4.5
LO Leakage and Sideband-
Detector Output
Calibration register,
D12:D11 = 1, A3:A0
= 0110
Output at 2 x f
TONE
(for sideband
suppression = -40dBc), f
TONE
=
2MHz, 100mV
RMS
-14.5
Amplifier Gain Range D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110 26 dB
Lower -3dB Corner Frequency 1
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