19-0774; Rev 2; 3/11
KIT
ATION
EVALU
BLE
AVAILA
2.4GHz to 2.5GHz 802.11g/b RF Transceiver, PA,
and Rx/Tx/Antenna Diversity Switch
General Description
The MAX2830 direct conversion, zero-IF, RF transceiver
is designed specifically for 2.4GHz to 2.5GHz 802.11g/b
WLAN applications. The MAX2830 completely integrates
all circuitry required to implement the RF transceiver
function, providing an RF power amplifier (PA), an Rx/Tx
and antenna diversity switch, RF-to-baseband receive
path, baseband-to-RF transmit path, voltage-controlled
oscillator (VCO), frequency synthesizer, crystal oscillator,
and baseband/control interface. The MAX2830 includes
a fast-settling sigma-delta RF synthesizer with smaller
than 20Hz frequency steps and a digitally tuned crystal
oscillator allowing use of a low-cost crystal. No I/Q cali-
bration is required; however, the device also integrates
on-chip DC-offset cancellation and I/Q errors and carrier
leakage-detection circuits for improved performance.
Only an RF bandpass filter (BPF), crystal, a pair of
baluns, and a small number of passive components are
needed to form a complete 802.11g/b WLAN RF front-
end solution.
The MAX2830 completely eliminates the need for an
external SAW filter by implementing on-chip monolithic fil-
ters for both the receiver and transmitter. The baseband
filters are optimized to meet the IEEE 802.11g standard
and proprietary turbo modes up to 40MHz channel band-
width. These devices are suitable for the full range of
802.11g OFDM data rates (6Mbps to 54Mbps) and
802.11b QPSK and CCK data rates (1Mbps to 11Mbps).
The ICs are available in a small, 48-pin TQFN package
measuring only 7mm x 7mm x 0.8mm.
Features
o
2.4GHz to 2.5GHz ISM Band Operation
o
IEEE 802.11g/b Compatible (54Mbps OFDM and
11Mbps CCK)
o
Complete RF Transceiver, PA, Rx/Tx and Antenna
Diversity Switch, and Crystal Oscillator
Best-in-Class Transceiver Performance
62mA Receiver Current
3.3dB Rx Noise Figure
-75dBm Rx Sensitivity (54Mbps OFDM)
No I/Q Calibration Required
0.1dB/0.35° Rx I/Q Gain/Phase Imbalance
33dB RF and 62dB Baseband Gain Control
Range
60dB Range Analog RSSI per RF Gain Setting
Fast Rx I/Q DC-Offset Settling
Programmable Baseband Lowpass Filter
20-Bit Sigma-Delta Fractional-N PLL with
< 20Hz Step Size
Digitally Tuned Crystal Oscillator
+17.1dBm Transmit Power (5.6% EVM with
54Mbps OFDM)
31dB Tx Gain Control Range
Integrated Power Detector
Fully Integrated RF Input and Output
Matching and DC Blocking
Serial or Parallel Gain-Control Interface
> 40dB Tx Sideband Suppression Without
Calibration
Rx/Tx I/Q Error Detection
o
Transceiver Operates from +2.7V to +3.6V
o
PA Operates from +2.7V to +4.2V
o
Low-Power Shutdown Mode
o
Small 48-Pin TQFN Package
(7mm x 7mm x 0.8mm)
MAX2830
Applications
Wi-Fi, PDA, VOIP, and Cellular Handsets
Wireless Speakers and Headphones
General 2.4GHz ISM Radios
Selector Guide
PART
MAX2830
MAX2831
MAX2832
INTEGRATED PA
Yes
Yes
No
INTEGRATED SWITCH
Yes
No
No
PART
MAX2830ETM+T
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
48 TQFN-EP*
*EP
= Exposed paddle.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Pin Configuration appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
