AFE2124 Datasheet, PDF (1/14 Pages) Burr-Brown (TI) – Dual HDSL/SDSL ANALOG FRONT END

®
AFE2124
AFE2124
For most current data sheet and other product
information, visit www.burr-brown.com
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.
SBWS010
Pulse Former
Line Driver
txLINE
txLINE
tx and rx
Interface
Lines
tx and rx
Control
Registers
Decimation
Filter
1/2 of AFE2124
∆Σ
Modulator
Difference
Amplifier
rxHYB
rxHYB
Programmable
Gain Amp
rxLINE
rxLINE
Patents Pending
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone]
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1999 Burr-Brown Corporation}
PDS-1538A
Printed in U.S.A. April, 1999