GENERAL DESCRIPTION

The AD7871/AD7872 are fast, complete, 14-bit analog-to-digital 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.

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