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ST70138B Folha de dados(PDF) 4 Page - STMicroelectronics

Nome de Peças ST70138B
Descrição Electrónicos  PCI/USB ADSL CHIPSET
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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ST70138B Folha de dados(HTML) 4 Page - STMicroelectronics

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MTC20174
September 2004
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
6
FEATURES
Fully Integrated AFE and Line Driver for ADSL
Overall 12 bit resolution, 1.1MHz signal
bandwidth
8.8 MS/s ADC
8.8 MS/s DAC
Differential analog I/O
Accurate continuous-time channel filtering
5th & 4th order tunable continuous-time receive
and transmit filters respectively
Support for multiple ADSL standards:
– ANSI T1.413 Issue 2
– ITU G.992.1 (G.dmt)
– Annex A
– Annex B (ADSL over ISDN)
– Annex C (ADSL over ISDN SBM/DBM/
G.dmt)
– ITU G.992.2 (G.lite)
Highest performance:
– Operation up to 18 kft (26 AWG)
– More than 8 Mbps downstream and 832 Kbps
upstream up to 8 kft (26 AWG)
– More than 3 Mbps downstream and 760 kbps
upstream up to 12 kft (26 AWG)
100 pin TQFP package allows high-density
board design
Power dissipation of 900mW at 25°C, typical
7
APPLICATIONS
The MTC20174 is an ADSL Analog Front-End
(AFE) with integrated Line-Driver for ATU-R appli-
cations offering Annex A, B and C.
8
GENERAL DESCRIPTION
The MTC20174 Analog Front End (AFE) with inte-
grated line driver is designed for DMT based
ADSL CPE modems compliant with ANSI T1.413
issue 2, ITU G.992.1 (G.dmt) and ITU G.992.2
(G.lite), for Annex A, B and C.
It is intended to be used with the MTC20166 DMT
modem and ATM framer as part of the MTK20170
chipset, but may also be used to support other
ADSL signal processors. It includes the following
parts:
A 12-bit 8.8Msamples/s DAC
A 13-bit 8.8Msamples/s ADC
Tunable low-pass and high-pass filters
Low-noise PGAs
A TX Pre-Amplifier
A TX Line-Driver
A fully integrated DCXO
A PLL-based frequency doubler
A filter tuning circuit
A dying gasp circuit
A digital module for control, test and interface
The following figure provides a graphical repre-
sentation of the MTC20174 functional blocks with
an additional separation in RX and TX path.
The analog and digital part have separated 3.3V
power supplies. In addition some part of the ana-
log section of the MTC20174 has a power supply
of 5V.
The typical total power consumption of the
MTC20174 is 900mW for 12dBm of line power (full
operation) at 250°C.
The package is a 100 pin TQFP.
DATA BRIEF
ADSL ANALOG FRONT END WITH INTEGRATED LINE
DRIVER FOR CPE APPLICATIONS
Figure 3. Package
Table 2. Order Codes
Part Number
Package
Temperature
MTC20174-TQ-C1
TQFP100
0 to 70°C
MTC20174-TQ-C1TR
Tape & Reel
0 to 70°C
TQFP100


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