MAX2838EVKIT+【PDF 1/22 页】KIT EVAL FOR MAX2838

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19-1049; Rev 1; 8/08

3.3GHz to 3.9GHz

Wireless Broadband RF Transceiver

General Description

The MAX2838 direct-conversion, zero-IF, RF transceiv-

er is designed specifically for 3.3GHz to 3.9GHz wire-

less broadband systems. The MAX2838 completely

integrates all circuitry required to implement the RF

transceiver function, providing RF-to-baseband receive

path, baseband-to-RF transmit path, VCO, frequency

synthesizer, and baseband/control interface. The

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

sizer with smaller than 29Hz frequency steps. The

MAX2838 supports 2Tx, 2Rx MIMO applications with a

master device providing coherent LO to the slave

device. The transceiver IC also integrates circuits for

on-chip DC-offset cancellation, I/Q error, and carrier-

leakage detection circuits. Only an RF bandpass filter

(BPF), TCXO, RF switch, PA, and a small number of

passive components are needed to form a complete

wireless broadband RF radio solution.

The MAX2838 completely eliminates the need for an

external SAW filter by implementing on-chip monolithic

filters for both the receiver and transmitter. The base-

band filters along with the Rx and Tx signal paths are

optimized to meet the stringent noise figure and lineari-

ty specifications. The device supports up to 2048-FFT

OFDM and implements programmable channel filters

for 1.5MHz to 28MHz RF channel bandwidths. The

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

IC is available in a small 48-pin thin QFN package mea-

suring only 6mm x 6mm x 0.8mm.

Applications

802.16-2004/802.16d Fixed WiMAX?

802.16e MIMO Mobile WiMAX

Features

? 3.3GHz to 3.9GHz Wide-Band Operation

? Master-Slave Modes with Coherent LO for MIMO

? Complete RF Transceiver, and PA Driver

0dBm Linear OFDM Transmit Power

-70dBr Tx Spectral Emission Mask

2.8dB Rx Noise Figure

Tx/Rx I/Q Error and LO Leakage Detection and

Adjustment

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 Filter

Sigma-Delta Fractional-N PLL with 29Hz Step Size

60dB Tx Gain Control Range with 1dB Step Size,

Digitally Controlled

94dB Rx Gain Control Range with 2dB Step Size,

Digitally Controlled

60dB Analog RSSI Instantaneous Dynamic Range

4-Wire SPI? Digital Interface

I/Q Analog Baseband Interface

Digital Tx/Rx/Shutdown Mode Control

Low-Power CLOCKOUT Mode

On-Chip Digital Temperature Sensor Readout

? +2.7V to +3.6V Transceiver Supply

? Low-Power Shutdown Mode

? Small 48-Pin Thin QFN Package (6mm x 6mm x 0.8mm)

Pin Configuration

WiMAX Pico and Femto Basestations

NLOS Wireless Broadband Systems

WiMAX is a trademark of the WiMAX Forum.

SPI is a trademark of Motorola, Inc.

Ordering Information

VCCRXLNA 1

GNDRXLNA 2

B5 3

RXRF+ 4

RXRF- 5

B4 6

VCCTXPAD 7

B3 8

B2 9

MAX2838

36 RXBBQ+

35 RXBBQ-

34 B6

33 B7

32 RSSI

31 DIN

30 DOUT

29 EXTVCO+

28 EXTVCO-

PART

MAX2838ETM+T

*EP = Exposed paddle.

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

48 TQFN-EP*

TXRF+ 10

TXRF- 11

B1 12

27 VCCLO

26 VCCVCO

25 VCOBYP

+Denotes a lead-free package.

T = Tape and reel.

48 THIN QFN

________________________________________________________________ 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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