MAX2850ITK+【PDF 1/33 页】TRANSMITTER MIMO 5GHZ 4CH 68TQFN

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_______________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxims website at www.maxim-ic.com.

5GHz, 4-Channel MIMO Transmitter

19-5009; Rev 1; 3/10

Ordering Information

General Description

The MAX2850 is a single-chip, 4-channel RF transmitter

IC designed for 5GHz wireless HDMI applications. The

IC includes all circuitry required to implement the com-

plete 4-channel MIMO RF transmitter function and crys-

tal oscillator, providing a fully integrated transmit path,

VCO, frequency synthesis, and baseband/control inter-

face. It includes a fast-settling, sigma-delta RF fractional

synthesizer with 76Hz frequency programming step

size. The IC also integrates on-chip I/Q amplitude and

phase-error calibration circuits. Dynamic on/off control

of four external PAs is implemented with programmable

precision voltages. A 4-to-1 analog mux routes external

PA power-detect voltages to the RSSI pin.

On-chip monolithic filters are included for transmitter I/Q

baseband signal reconstruction to support both 20MHz

and 40MHz RF channels. The baseband filtering and

Tx signal paths are optimized to meet stringent WHDI

requirements. The upconverter local oscillator is coher-

ent among all the transmitter channels.

The reverse-link control channel uses an on-chip 5GHz

OFDM receiver. It shares the RF synthesizer and LO gen-

eration circuit with the MIMO transmitters. The receiver

includes both an in-channel RSSI and an RF RSSI.

The MIMO transmitter chip is housed in a small, 68-pin

thin QFN leadless plastic package with exposed pad.

Applications

5GHz Wireless HDMI (WHDI)

5GHz FDD Backhaul and WiMax"

5GHz MIMO Transmitter Up to Four Spatial

Streams

5GHz Beam Steering Transmitter

Features

S 5GHz 4x MIMO Downlink Transmitters, Single

Uplink IEEE 802.11a Receiver

4900MHz to 5900MHz Frequency Range

-5dBm Transmit Power (54Mbps OFDM)

Coherent LO Among Transmitters

31dB Tx Gain-Control Range with 0.5dB Step

Size, Digitally Controlled

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

Adjustment

Programmable 20MHz/40MHz Tx I/Q Lowpass

Anti-Aliasing Filter

4-to-1 Analog Mux for PA Power Detect

4-Channel PA On/Off Control

4.5dB Rx Noise Figure

70dB Rx Gain-Control Range with 2dB Step

Size, Digitally Controlled

60dB Dynamic Range Receiver RSSI

RF Wideband Receiver RSSI

Programmable 20MHz/40MHz Rx I/Q Lowpass

Channel Filters

Sigma-Delta Fractional-N PLL with 76Hz

Resolution

Monolithic Low-Noise VCO with -35dBc

Integrated Phase Noise

4-Wire SPI"

Digital Interface

I/Q Analog Baseband Interface

Digital Tx/Rx Mode Control

On-Chip Digital Temperature Sensor Readout

Complete Baseband Interface

Digital Tx/Rx Mode Control

S +2.7V to +3.6V Supply Voltage

S Small, 68-Pin Thin QFN Package (10mm x 10mm)

*EP = Exposed pad.

+Denotes a lead(Pb)-free/RoHS-compliant package.

WiMax is a trademark of WiMax Forum.

SPI is a trademark of Motorola, Inc.

Typical Operating Circuit appears at end of data sheet.

PART

TEMP RANGE

PIN-PACKAGE

MAX2850ITK+

-25NC to +85NC 68 Thin QFN-EP*

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