CS5317 is a 16-bit, 20 kHz oversampling A/D converter from Cirrus Logic that provides a complete voiceband DSP front-end, including a 16-bit A/D converter, internal track-and-hold amplifier, on-chip voltage reference, linear-phase digital filter, and on-chip phase-lock loop (PLL) for simplified output phase locking in modem applications. The CS5317 features DSP-compatible serial interface and offers output word rates up to 20 kHz. It is also characterized by low power dissipation (220 mW).