The receive channel is designed around a fourth-order deltasigma analog-to-digital converter. It includes a difference amplifier designed to be used with an external compromise hybrid for first-order analog echo cancellation. A programmable gain amplifier with gains 0dB to +9dB is also included. The deltasigma modulator, operating at a 24X oversampling ratio, produces a 14-bit output at symbol rates up to 1168kHz (for 2.3Mbps operation).