1
®
AFE1103
AFE1103
®
AFE1103
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1996 Burr-Brown Corporation PDS-1330A Printed in U.S.A. August, 1996
HDSL/MDSL ANALOG FRONT END
FEATURES
l COMPLETE ANALOG INTERFACE
l T1, E1, AND MDSL OPERATION
l CLOCK SCALEABLE SPEED
l SINGLE CHIP SOLUTION
l +5V ONLY (5V OR 3.3V DIGITAL)
l 250mW POWER DISSIPATION
l 48-PIN SSOP
l –40°C TO +85°C OPERATION
l SECOND SOURCED BY BROOKTREE
Bt8921
DESCRIPTION
Burr-Brown’s Analog Front End greatly reduces the
size and cost of an HDSL or MDSL system by provid-
ing all of the active analog circuitry needed to connect
the Brooktree Bt8952 HDSL digital signal processor
to an external compromise hybrid and a 1:2 HDSL line
transformer. All internal filter responses as well as the
pulse former output scale with clock frequency—
allowing the AFE1103 to operate over a range of bit
rates from 196kbps to 1.168Mbps.
Functionally, this unit is separated into a transmit and
a receive section. The transmit section generates, fil-
ters, and buffers outgoing 2B1Q data. The receive
section filters and digitizes the symbol data received
on the telephone line and passes it to the Bt8952. The
HDSL Analog Interface is a monolithic device fabri-
cated on 0.6µCMOS. It operates on a single +5V
supply. It is housed in a 48-pin SSOP package. This
unit is second sourced by Brooktree’s Bt8921.
Pulse
Former
PLL
OUT
PLL
IN
txDAT
P
txDAT
N
txCLK
rxSYNC
rxLOOP
rxGAIN
rxD13 - rxD0
Line
Driver
Voltage
Reference
Delta-Sigma
Modulator
Transmit
Control
Receive
Control
Decimation
Filter
14
2
txLINE
N
txLINE
P
REF
P
V
CM
REF
N
rxLINE
P
rxLINE
N
rxHYB
P
rxHYB
N
Patents Pending