Digital subscriber line (DSL) applications require high resolution and wide bandwidth A/D converters. The dynamic range requirement typically results in 14-bits and 13-bits over an analog signal bandwidth of 300kHz and 1.1MHz, respectively. A robust and low-cost design is necessary since the ADC is targeted for high volume production. Therefore, an SC modulator was chosen instead of a time-continuous approach. As far as is known to the authors, the achieved power efficiency (8mW) is the best compared to similar SC converters reported in the open literature. To not compromise the maximum data rate, the harmonic distortion may not exceed -80dBc for a -6dB full-scale sinusoidal test signal.

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