GENERAL DESCRIPTION

The MTC20174 Analog Front End (AFE) with integrated 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.

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

APPLICATIONS

The MTC20174 is an ADSL Analog Front-End (AFE) with integrated Line-Driver for ATU-R applications offering Annex A, B and C.