The CS5504/5/6/7/8/9 are a series of A/D converters all derived from a high performance DS architecture. The CS5504 family members are based on a core architecture including both an analog modulator and a digital filter, with only subtle differences between the individual products. The digital filter has been optimized to attenuate ac line interference (50/60 Hz and their harmonics) when the devices are operated from a low-cost 32.768kHz crystal.