Description
The MTC20154 is the fifth generation Analog Front End (AFE) designed for DMT based ADSL (Asynchronous Digital Subscriber Line) modems compliant with ANSI T1.413 category 2 standard. It includes one 12 bit DAC and one 13 bit ADC.It is intended to be used with the MTC20156/ MTC20147 DMT/ATM processors as part of the MTK20150/MTK20141 chipsets, but may also be used to support other xDSL signal processors. The MTC20154 provides programmable low pass filters for each of the two channels and automatic gain control. A configuration pin allows the filters to be switched from ATU-R mode to ATU-C mode. The pipeline ADC architecture provides 13 bit dynamic range and a signal bandwith of 1.1 MHz. The device consumes only 0.35 Watt in full operation and has a power down mode for standby. It is housed in a compact 64 pin thin plastic quad flat

Features
■ ■Fully integrated AFE for ADSL ■Overall 12 bit resolution, 1.1MHz signal bandwidth ■8.8 MS/s ADC ■8.8 MS/s DAC ■THD: -60 dB @ full scale ■1V full scale input ■Differential analog I/O ■Accurate continuous-time channel filtering ■3rd & 4th order tunable continuous time LP Filters ■64 pin TQFP package ■350mW power consumption

Applications
■ ■ADSL Front-end for all full rate and Lite standards