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The CS5101A and CS5102A are 16-bit, monolithic CMOS A/D converters capable of 100 kHz (5101A) and 20 kHz (5102A) throughput. The low power consumption of 44 mW, coupled with a power-down mode, makes the CS5102A particularly suitable for battery-powered operation. On-chip, self-calibration circuitry achieves nonlinearity of ±0.001% of FS and guarantees 16-bit no missing codes over the entire specified temperature range. Superior linearity also leads to 92 dB S/(N+D) with harmonics below -100 dB. Offset and full-scale errors are minimized during the calibration cycle, eliminating the need for external trimming. The CS5101A and CS5102A each consist of a 2-channel input multiplexer, D/A converter, conversion and calibration micro-controller, clock generator, comparator, and serial communications port. The inherent sampling architecture of the device eliminates the need for an external track and hold amplifier. Each converter's 16-bit data is output in serial form with either binary or 2's complement coding. Three output timing modes are available for easy interfacing to micro-controllers and shift registers. Unipolar and bipolar input ranges are digitally selectable.
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