Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11a Rx Mode (MAX2828/MAX2829)
(MAX2828/MAX2829 evaluation kits: V
CC
= +2.7V, f
IN
= 5.25GHz; receiver baseband I/Q outputs at 112mV
RMS
(-19dBV), f
REFOSC
=
40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, R
BIAS
= 11kΩ, registers set to default settings and cor-
responding test mode, T
A
= +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indi-
cated.) (Tables 1, 2, 3)
MIN
MAX
RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS
802.11a low-band mode
4.900 5.350
RF Input Frequency Range
802.11a high-band mode
5.470 5.875
LNA high-gain mode (B7:B6 = 11)
-15
LNA medium-gain mode
(B7:B6 = 10)
-11
RF Input Return Loss
With 50Ω external
match
LNA low-gain mode (B7:B6 = 0X)
-7
dB
T
A
= +25° C9197
Maximum gain,
B7:B1 = 1111111
T
A
= -40°C to +85°C (Note 1) 88
Total Voltage Gain
Minimum gain,
B7:B1 = 0000000
T
A
= +25° C03
dB
From high-gain mode (B7:B6 = 11) to medium-gain
mode (B7:B6 = 10) (Note 3)
-19
RF Gain Steps
From high-gain mode (B7:B6 = 11) to low-gain mode
(B7:B6 = 0X) (Note 3)
-34.5
dB
f
RF
= 4.9GHz -0.3
f
RF
= 5.35GHz 0.4
Gain Variation Relative to
5.25GHz
f
RF
= 5.875GHz -4
dB
Baseband Gain Range
From maximum baseband gain (B5:B1 = 11111) to
minimum baseband gain (B5:B1 = 00000)
62 dB
Voltage gain ≥ 65dB, with B7:B6 = 11 4.5
Voltage gain = 50dB, with B7:B6 = 11 4.8
Voltage gain = 45dB, with B7:B6 = 10 15
DSB Noise Figure
Voltage gain = 15dB, with B7:B6 = 0X 36
dB
Output P-1
dB
Voltage gain = 90dB, with B7:B6 = 11 3.2
Voltage gain = 60dB,
with B7:B6 = 11
-15
Voltage gain = 45dB,
with B7:B6 = 10
0.5
Out-of-Band Input IP3
-35dBm jammers at
40MHz and 78MHz
offset; based on IM3
at 2MHz
Voltage gain = 40dB,
with B7:B6 = 0X
20
Voltage gain = 35dB, with B7:B6 = 11 -32
Voltage gain = 20dB, with B7:B6 = 10 -12In-Band Input P-1
dB
Voltage gain = 5dB, with B7:B6 = 0X 3
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