A CMOS HDSL2 analog front-end

A 5-V 0.5-mum CMOS analog front-end (AFE) IC for HDSL2 incorporates transmi t digital-to-analog converter (DAC), transmit filters, output buffer, recei ve AGC, and receive ADC, The AFE consumes 525 mW and provides better than 8 2-dB signal-to-noise-and distortion ratio (SNDR) in both transmit and recei ve paths. It supports variable data rates from 64 kb/s up to 2.32 Mb/s, and enables an HDSL2 system to achieve better than 14 kft of noise-free reach ton 26-gauge mire) at 1.544 Mb/s.