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ADF4602

Rev. 0 | Page 3 of 36

GENERAL DESCRIPTION

The ADF4602 is a 3G transceiver integrated circuit (IC)

offering unparalleled integration and feature set. The IC is

ideally suited to high performance 3G femtocells providing

cellular fixed mobile converged (FMC) services. With only a

handful of external components, a full multiband transceiver is

implemented.

UMTS Band 1 through Band 6 and Band 8 through Band 10 are

supported in a single device.

The receiver is based on a direct conversion architecture. This

architecture is the ideal choice for highly integrated wideband

CDMA (WCDMA) receivers, reducing the bill of materials by

fully integrating all interstage filtering. The front end includes

three high performance, single-ended low noise amplifiers

(LNAs), allowing the device to support tri-band applications.

The single-ended input structure eases interface and reduces

the matching components required for small footprint single-

ended duplexers. The excellent device linearity achieves good

performance with a large range of SAW and ceramic filter

duplexers.

The integrated receive baseband filters offer selectable

bandwidth, enabling the device to receive both WCDMA and

GSM-EDGE radio signals. The selectable bandwidth filter,

coupled with the multiband LNA input structure, allows

GSM-EDGE signals to be monitored as part of a UMTS home

basestation.

The transmitter uses an innovative direct conversion modulator

that achieves high modulation accuracy with exceptionally low

noise, eliminating the need for external transmit SAW filters.

The fully integrated phase lock loops (PLLs) provide high

performance and low power fractional-N frequency synthesis

for both receive and transmit sections. Special precautions have

been taken to provide the isolation demanded by frequency

division duplex (FDD) systems. All VCO and loop filter

components are fully integrated.

The ADF4602 also contains on-chip low dropout voltage

regulators (LDOs) to deliver regulated supply voltages to the

functions on chip, with an input voltage of between 3.1 V

and 3.6 V.

The IC is controlled via a standard 3-wire serial interface with

advanced internal features allowing simple software programming.

Comprehensive power-down modes are included to minimize

power consumption in normal use.

ADF4602 Datenblatt(PDF) 3 Page - Analog Devices

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