AFE2126

更新时间： 2024-09-17 22:05:27

品牌	Logo	应用领域
BB		/
页数	文件大小	规格书
11页	150K
描述
Dual HDSL/SDSL ANALOG FRONT END

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数据手册

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AFE2126 数据手册

AFE2126

For most current data sheet and other product

information, visit www.burr-brown.com

Dual HDSL/SDSL ANALOG FRONT END

FEATURES

● SERIAL DIGITAL INTERFACE

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 AFE2126 is optimized for HDSL (High bit rate

DSL) and for SDSL (symmetrical DSL) applications.

The AFE2126 is particularly suitable for multiple rate

DSL systems because the transmit and receive filter

responses automatically change with clock frequency.

The device operates over a wide range of data rates from

64kbps to 1168kbps.

● 48-LEAD SSOP PACKAGE

● E1, T1 AND SDSL OPERATION

● 64kbps TO 1168kbps OPERATION

● SCALEABLE DATA RATE

● 280mW POWER DISSIPATION PER

CHANNEL

● TWO COMPLETE HDSL ANALOG INTER-

FACES

● +5V POWER (5V or 3.3V Digital)

● WIDE Rx GAIN RANGE: 0dB TO 18dB

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.

txLINE+

Pulse Former

txLINE–

Line Driver

tx and rx

Control

Registers

tx and rx

Interface

Lines

Difference

Amplifier

rxHYB+

rxHYB–

rxLINE+

Decimation

Filter

∆Σ

Modulator

rxLINE–

Programmable

Gain Amp

1/2 of AFE2126

Patents Pending

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

•

PDS-1561A

Printed in U.S.A. December, 1999

AFE2126

12 3 4 5 6 7...11

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