MAX2839EVKIT+【PDF 1/26 页】KIT EVAL FOR MAX2839

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19-3218; Rev 1; 3/08

2.3GHz to 2.7GHz MIMO Wireless Broadband

RF Transceiver

General Description

The MAX2839 direct conversion, zero-IF, RF transceiver

is designed specifically for 2GHz 802.16e MIMO mobile

WiMAX systems. The device incorporates one transmit-

ter and two receivers, with >40dB isolation between

each receiver. The MAX2839 completely integrates all

circuitry required to implement the RF transceiver func-

tion, providing RF to baseband receive path, and base-

band to RF transmit path, VCO, frequency synthesizer,

crystal oscillator, and baseband/control interface. The

device includes a fast-settling sigma-delta RF synthe-

sizer with smaller than 40Hz frequency steps and a

crystal oscillator that allows the use of a low-cost crystal

in place of a TCXO. The transceiver IC also integrates

circuits for on-chip DC-offset cancellation, I/Q error,

and carrier leakage detection circuits. An internal trans-

mit to receive loopback mode allows for receiver I/Q

imbalance calibration. The local oscillator I/Q quadra-

ture phase error can be digitally corrected in approxi-

mately 0.125° steps. Only an RF bandpass filter (BPF),

crystal, RF switch, PA, and a small number of passive

components are needed to form a complete wireless

broadband RF radio solution.

The MAX2839 completely eliminates the need for an

external SAW filter by implementing on-chip program-

mable monolithic filters for both the receiver and trans-

mitter, for all 2GHz and 802.16e profiles and WIBRO.

The baseband filters along with the Rx and Tx signal

paths are optimized to meet the stringent noise figure

and linearity specifications. The device supports up to

2048 FFT OFDM and implements programmable chan-

nel filters for 3.5MHz to 20MHz RF channel bandwidths.

The transceiver requires only 2μs Tx-Rx switching time.

The IC is available in a small 56-pin TQFN package

measuring 8mm x 8mm x 0.8mm.

Applications

802.16e Mobile WiMAX? Systems

Korean WIBRO Systems

Features

? 2.3GHz to 2.7GHz Wideband Operation

? Dual Receivers for MIMO, Single Transmitter

? Complete RF Transceiver, PA Driver, and Crystal

Oscillator

2.3dB Rx Noise Figure on Each Receiver

-35dB Rx EVM for 64QAM Signal

0dBm Linear OFDM Transmit Power (64QAM)

-70dBr Tx Spectral Emission Mask

-35dBc LO Leakage

Automatic Rx DC Offset Correction

Monolithic Low-Noise VCO with -39dBc

Integrated Phase Noise

Programmable Rx I/Q Lowpass Channel Filters

Programmable Tx I/Q Lowpass Anti-Aliasing

Filters

Sigma-Delta Fractional-N PLL with < 40Hz Step

62dB Tx Gain Control Range with 1dB Step

Size, Digitally Controlled

95dB Rx Gain Control Range with 1dB Step

Size, Digitally Controlled

60dB Analog RSSI Instantaneous Dynamic

Range

4-Wire SPI? Digital Interface

I/Q Analog Baseband Interface

Digital Tx/Rx Mode Control

Digitally Tuned Crystal Oscillator

On-Chip Digital Temperature Sensor Readout

? +2.7V to +3.6V Transceiver Supply

? Low-Power Shutdown Current

? Small, 56-Pin TQFN Package (8mm x 8mm x

0.8mm)

Ordering Information

Proprietary Wireless Broadband Systems

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

802.11g or n WLAN with MRC or MIMO Down Link

MAX2839ETN+TD -40°C to +85°C 56 TQFN-EP*

T5688+2

+Denotes a lead-free package.

T = Tape and reel.

*EP = Exposed paddle.

D = Dry pack.

WiMAX is a trademark of the WiMAX Forum.

SPI is a trademark of Motorola, Inc.

Pin Configuration and Block Diagram/Typical Operating

Circuit appear at end of data sheet.

________________________________________________________________ Maxim Integrated Products

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.

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