AD7871

Data Sheet LC2MOS Complete 14-Bit, Sampling ADCs AD7871/AD7872 FEATURES Complete monolithic 14-bit ADC Twos complement coding Parallel, byte, and serial digital interface 80 dB SNR at 10 kHz input frequency 57 ns data access time Low power: 50 mW typ 83 kSPS throughput rate APPLICATIONS Digital signal processing High speed modems Speech recognition and synthesis Spectrum analysis DSP servo control GENERAL DESCRIPTION The AD7871/AD7872 are fast, complete, 14-bit analog-todigital converters (ADC). They consist of a track-and-hold amplifier, successive approximation ADC, 3 V buried Zener reference, and versatile interface logic. The ADC features a selfcontained, laser trimmed internal clock, so no external clock timing components are required. The on-chip clock may be overridden to synchronize ADC operation to the digital system for minimum noise. The AD7871 offers a choice of three data output formats: a single, parallel, 14-bit word; two 8-bit bytes or a 14-bit serial data stream. The...