A 3 V CMOS quad-spectrum ADSL CPE analog front-end with 5 V integrated line driver

The analog front-end (AFE) for ADSL customer premise equipment (CPE) permits quad-spectrum down-stream (138 kHz to 3.75 MHz). The AFE includes a 5 V line driver in a standard 0.18 /spl mu/m 3 V CMOS process. The receive path contains an ADC with an 80 dB SNDR over 3.75 MHz bandwidth. Down-stream data rates of more than 50 Mb/s are measured on short loops.