MAX2831 Datasheet, PDF (1/34 Pages) Maxim Integrated Products – 2.4GHz to 2.5GHz 802.11g/b RF Transceivers with Integrated PA

19-0363; Rev 1; 3/10
EVAALVUAAILTAIOBNLEKIT
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
General Description
The MAX2831/MAX2832 direct conversion, zero-IF, RF
transceivers are designed specifically for 2.4GHz to
2.5GHz 802.11g/b WLAN applications. The MAX2831
completely integrates all circuitry required to implement
the RF transceiver function, providing an RF power
amplifier (PA), RF-to-baseband receive path, baseband-
to-RF transmit path, VCO, frequency synthesizer, crystal
oscillator, and baseband/control interface. The MAX2832
integrates the same functional blocks except for the PA.
Both devices include a fast-settling sigma-delta RF syn-
thesizer with smaller than 20Hz frequency steps and a
digitally tuned crystal oscillator allowing use of a low-cost
crystal. The devices also integrate on-chip DC-offset
cancellation and I/Q errors and carrier leakage-detection
circuits. Only an RF bandpass filter (BPF), crystal, RF
switch, and a small number of passive components are
needed to form a complete 802.11g/b WLAN RF front-
end solution.
The MAX2831/MAX2832 completely eliminate the need
for an external SAW filter by implementing on-chip mono-
lithic filters 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 bandwidth. 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 thin
QFN package measuring only 7mm x 7mm x 0.8mm.
Applications
Wi-Fi, PDA, VOIP, and Cellular Handsets
Wireless Speakers and Headphones
General 2.4GHz ISM Radios
Features
♦ 2.4GHz to 2.5GHz ISM Band Operation
♦ IEEE 802.11g/b Compatible (54Mbps OFDM and
11Mbps CCK)
♦ Complete RF Transceiver, PA, and Crystal
Oscillator (MAX2831)
Best-in-Class Transceiver Performance
62mA Receiver Current
2.6dB Rx Noise Figure
-76dBm 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
+18.5dBm Transmit Power (5.6% EVM with
54Mbps OFDM)
31dB Tx Gain Control Range
Integrated Power Detector (MAX2831)
Serial or Parallel Gain-Control Interface
> 40dB Tx Sideband Suppression without
Calibration
Tx/Rx I/Q Error Detection
♦ Transceiver Operates from +2.7V to +3.6V
♦ PA Operates from +2.7V to +4.2V (MAX2831)
♦ Low-Power Shutdown Mode
♦ Small 48-Pin Thin QFN Package
(7mm x 7mm x 0.8mm)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX2831ETM+T
-40°C to +85°C 48 Thin QFN-EP*
MAX2832ETM+T
-40°C to +85°C 48 Thin QFN-EP*
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.