Datasheet
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Detailed Description
The MAX2828/MAX2829 single-chip, RF transceiver ICs
are designed for WLAN applications. The MAX2828 is
designed for 5GHz 802.11a (OFDM), and the MAX2829
is designed for dual-band 2.4GHz 802.11b/g and 5GHz
802.11a. The ICs include all circuitry required to imple-
ment the RF transceiver function, fully integrating the
receive path, transmit path, VCO, frequency synthesiz-
er, and baseband/control interface.
Modes of Operation
The MAX2828/MAX2829 have seven primary modes of
operation: shutdown, SPI reset, standby, transmit,
receive, transmitter calibration, and receiver calibration
(see Table 5).
Pin Description (continued)
PIN
MAX2828
MAX2829
NAME FUNCTION
50 50 B2 Rx/Tx Gain-Control Digital Input Bit 2
51 51 GND
Rx IF Ground. Make connections to ground vias as short as possible. Do not share
ground vias with any other branches.
52 52 V
CC
Rx IF Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not
share the bypass-capacitor ground vias with any other branches.
53 53 B3 Rx/Tx Gain-Control Digital Input Bit 3
54 54 B4 Rx/Tx Gain-Control Digital Input Bit 4
55 55 V
CC
Rx Downconverter Supply Voltage. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass-capacitor ground vias with any other branches.
56 56 B5 Rx/Tx Gain-Control Digital Input Bit 5
— 4 RXRFL 2.4GHz Single-Ended LNA Input. Requires AC-coupling and external matching network.
— 11
TXRFL+
— 12 TXRFL-
2.4GHz Tx PA Driver Differential Outputs. Requires AC-coupling and external matching
network (and balun) to the external PA input.
EP EP
EXPOSED
PADDLE
Exposed Paddle. Connect to the ground plane with multiple vias for proper operation and
heat dissipation.
LOGIC PINS
MODE
SHDN TXENA RXENA
REGISTER
SETTINGS
SPI™ Reset 0 1 1 X
Shutdown 0 0 0 X
Standby 1 0 0 X
Rx 1 0 1 X
Tx 1 1 0 X
Tx Calibration 1 1 0
Calibration
register D1 = 1
Rx Calibration 1 0 1
Calibration
register D0 = 1
Table 5. Mode Table
X = Don’t care or do not apply.
SPI is a trademark of Motorola, Inc.
MAX2828/MAX2829
28
Maxim Integrated