AFE2126
器件描述：Dual HDSL/SDSL ANALOG FRONT END
器件厂商：BURR-BROWN [Burr-Brown Corporation]
文件大小：148.74KB，共11页
Sponsor by e络盟器件资料摘要：
1
®
AFE2126
AFE2126
®
Dual HDSL/SDSL ANALOG FRONT END
FEATURES
l SERIAL DIGITAL INTERFACE
l 48-LEAD SSOP PACKAGE
l E1, T1 AND SDSL OPERATION
l 64kbps TO 1168kbps OPERATION
l SCALEABLE DATA RATE
l 280mW POWER DISSIPATION PER
CHANNEL
l TWO COMPLETE HDSL ANALOG INTER-
FACES
l +5V POWER (5V or 3.3V Digital)
l WIDE Rx GAIN RANGE: 0dB TO 18dB
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.
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.
©
1999 Burr-Brown Corporation PDS-1561A Printed in U.S.A. December, 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
For most current data sheet and other product
information, visit www.burr-brown.com
∆Σ
Modulator
Pulse Former
Programmable
Gain Amp
Difference
Amplifier
Patents Pending1/2 of AFE2126
Line Driver
txLINE+
txLINE–
rxHYB+
rxHYB–
rxLINE+
rxLINE–
tx and rx
Control
Registers
tx and rx
Interface
Lines
Decimation
Filter
AFE2126
®
AFE2126
AFE2126
®
Dual HDSL/SDSL ANALOG FRONT END
FEATURES
l SERIAL DIGITAL INTERFACE
l 48-LEAD SSOP PACKAGE
l E1, T1 AND SDSL OPERATION
l 64kbps TO 1168kbps OPERATION
l SCALEABLE DATA RATE
l 280mW POWER DISSIPATION PER
CHANNEL
l TWO COMPLETE HDSL ANALOG INTER-
FACES
l +5V POWER (5V or 3.3V Digital)
l WIDE Rx GAIN RANGE: 0dB TO 18dB
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.
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.
©
1999 Burr-Brown Corporation PDS-1561A Printed in U.S.A. December, 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
For most current data sheet and other product
information, visit www.burr-brown.com
∆Σ
Modulator
Pulse Former
Programmable
Gain Amp
Difference
Amplifier
Patents Pending1/2 of AFE2126
Line Driver
txLINE+
txLINE–
rxHYB+
rxHYB–
rxLINE+
rxLINE–
tx and rx
Control
Registers
tx and rx
Interface
Lines
Decimation
Filter
AFE2126