EEWorld咨询电话：82357002，82350740－8068 邮件咨询：datasheet@eeworld.com.cn
器件描述：HDSL/MDSL ANALOG FRONT END WITH VCXO
器件厂商：BURR-BROWN [Burr-Brown Corporation]
厂商主页：http://www.burr-brown.com/
文件大小：219.57KB
文件页数：12
PDF阅读：AFE1115E.pdf (点击阅读器件资料)
摘要：
1
?
AFE1115
AFE1115
?
?
1997 Burr-Brown Corporation PDS-1384 Printed in U.S.A. July, 1997
HDSL/MDSL ANALOG FRONT END WITH VCXO
DESCRIPTION
Burr-Brown’s Analog Front End greatly reduces the
size and cost of an HDSL (High bit rate Digital
Subscriber Line) system by providing all of the active
analog circuitry needed to connect an HDSL digital
signal processor to an external compromise hybrid and
a HDSL line transformer. The transmit and receive
filter responses automatically change with clock fre-
quency—allowing the AFE1115 to operate over a
range of data rates from 196kbps to 1.168Mbps.
Functionally, this unit consists of a transmit and a
receive section with a VCXO (Voltage Controlled
Crystal Oscillator) control DAC and VCXO circuitry.
The transmit section generates, filters, and buffers
outgoing 2B1Q data. The receive section filters and
digitizes the symbol data received on the telephone
line. Data to the VCXO and symbol data are sent to the
AFE1115 via two serial interfaces; the receive data is
available as a 14-bit parallel word. 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 small 56-pin SSOP package.
Pulse
Former
Filter
PLL
OUT
PLL
IN
txDATA+
txSCLK
txCLK
rxSYNC
rxLOOP
rxGAIN
rxDATA
Output
Buffer
Voltage
Reference
Delta-Sigma
Modulator
Transmit
Control
Receive
Control
Decimation
Filter
14
2
vcDATA
vcSCLK
vcLE
VCXO
DAC
txLINE–
txLINE+
vcDAC
REF
P
V
CM
REF
N
Oscillator
VCXO Output
VCXO Input
VCXO Output Clock
rxLINE+
rxLINE–
rxHYB+
rxHYB–
?
AFE1115
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
l +5V ONLY (5V or 3.3V Digital)
l SCALEABLE DATA RATE
l 300mW POWER DISSIPATION
l 56-PIN SSOP
FEATURES
l COMPLETE HDSL ANALOG INTERFACE
l E1, T1 AND MDSL OPERATION
l VCXO AND VCXO CONTROL CIRCUITRY
相关器件：AFE1115
|
