AFE2124

®

Dual HDSL /SDSL ANALOG FRONT END

FEATURES

q SERIAL DIGITAL INTERFACE

q 48-LEAD SSOP PACKAGE

q E1, T1 AND SDSL OPERATION

q 64kbps TO 1168kbps OPERATION

q SCALEABLE DATA RATE

q 250mW POWER DISSIPATION PER

CHANNEL

q TWO COMPLETE HDSL ANALOG INTER-

FACES

q +5V POWER (5V or 3.3V Digital)

DESCRIPTION

Burr-Brown’s dual Analog Front End chip greatly re-

duces the size and cost of a DSL (Digital Subscriber

Line) system by providing all of the active analog

circuitry needed to connect two digital signal processors

to external compromise hybrids and line transformers.

The AFE2124 is optimized for HDSL (High bit rate

DSL) and for SDSL (symmetrical DSL) applications.

Because the transmit and receive filter responses auto-

matically change with clock frequency, the AFE2124 is

particularly suitable for multiple rate DSL systems. The

device operates over a wide range of data rates from

64kbps to 1168kbps.

Functionally, each half of this unit consists of a transmit

and a receive section. The transmit section generates

analog signals from 2-bit digital symbol data and filters

the analog signals to create 2B1Q symbols. The on-

board differential line driver provides a 13.5dBm signal

to the telephone line. The receive section filters and

digitizes the symbol data received on the telephone line.

This IC operates on a single 5V supply. The digital

circuitry in the unit can be connected to a supply from

3.3V to 5V. It is housed in a 48-lead SSOP package.

PDS-1538A

Printed in U.S.A. April, 1999

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

∆Σ

Modulator

Pulse Former

Programmable

Gain Amp

Difference

Amplifier

Patents Pending

1/2 of AFE2124

Line Driver

txLINE

txLINE

rxHYB

rxHYB

rxLINE

rxLINE

tx and rx

Control

Registers

tx and rx

Interface

Lines

Decimation

Filter

For most current data sheet and other product

information, visit www.burr-brown.com

AFE2124