Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11g Rx Mode (MAX2829)
(MAX2829 evaluation kit: V
CC
= +2.7V, f
IN
= 2.437GHz; 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 correspond-
ing test mode, T
A
= +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.)
(Tables 1, 2, 3)
RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS
RF Input Frequency Range
2.412 2.500
LNA high-gain mode (B7:B6 = 11)
-22
LNA medium-gain mode
(B7:B6 = 10)
-24
RF Input Return Loss
With 50Ω external
match
LNA low-gain mode (B7:B6 = 0X)
-12
dB
T
A
= +25° C8794
Maximum gain,
B7:B1 = 1111111
T
A
= -40°C to +85°C (Note 1) 85
Total Voltage Gain
Minimum gain,
B7:B1 = 0000000
T
A
= +25° C1
5.5
dB
From high-gain mode (B7:B6 = 11) to medium-gain
mode (B7:B6 = 10) (Note 3)
-15.5
RF Gain Steps
From high-gain mode (B7:B6 = 11) to low-gain mode
(B7:B6 = 0X) (Note 3)
-30.5
dB
Gain Variation Over RF Band f
RF
= 2.412GHz to 2.5GHz 3 dB
Baseband Gain Range
From maximum baseband gain (B5:B1 = 11111) to
minimum baseband gain (B5:B1 = 00000)
62 dB
DC ELECTRICAL CHARACTERISTICS (continued)
(MAX2828/MAX2829 evaluation kits: V
CC
= 2.7V to 3.6V, Rx/Tx set to maximum gain, R
BIAS
= 11kΩ, no signal at RF inputs, all RF
inputs and outputs terminated into 50Ω, receiver baseband outputs are open, no signal applied to Tx I/Q BB inputs in Tx mode,
f
REFOSC
= 40MHz, registers set to default settings and corresponding test mode, T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are at V
CC
= +2.7V and T
A
= +25°C, unless otherwise noted.) (Note 1)
T
A
= -40°C (relative to +25°C) -25
Rx I/Q Output Common-Mode
Voltage Variation
T
A
= +85° C (relative to +25°C) 20
mV
Tx Baseband Input Common-
Mode Voltage Operating Range
0.9 1.3 V
Tx Baseband Input Bias Current 13 µA
Reference Voltage Output -1mA < I
OUT
< +1mA 1.2 V
Digital Input-Voltage High, V
IH
V
CC
-
0.4
V
Digital Input-Voltage Low, V
IL
0.4 V
Digital Input-Current High, I
IH
-1 +1 µA
Digital Input-Current Low, I
IL
-1 +1 µA
LD Output-Voltage High, V
OH
Sourcing 100µA
V
CC
-
0.4
V
LD Output-Voltage Low, V
OL
Sinking 100µA 0.4 V
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