AD7871KN

Overview

The AD7871KN is a complete monolithic 14-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from ±5 V power supplies and accepts bipolar input signals within the ±3 V range. The device features an internal laser-trimmed clock, eliminating the need for external timing components. It provides three data output formats: a single 14-bit parallel word, two 8-bit bytes, or a 14-bit serial stream. Key performance specifications include an 80 dB signal-to-noise ratio at a 10 kHz input frequency, a maximum conversion time of 10.5 µs using the internal clock, and a typical power dissipation of 50 mW.

Feature Summary

• Complete monolithic integration including track-and-hold amplifier, SAR ADC, and buried Zener reference
• Versatile digital interface supporting parallel, byte, and serial data output formats
• Self-contained laser-trimmed internal clock with override capability for system synchronization

Applications

• Digital signal processing
• High speed modems
• Speech recognition and synthesis
• Spectrum analysis
• DSP servo control

Procurement Notes

Verify the specific suffix KN against the manufacturer's current ordering guide to confirm package type and temperature range availability. Ensure compatibility with ±5 V supply requirements and bipolar input voltage ranges during procurement planning.

Selection Notes

Select this component when a high-resolution 14-bit conversion is required with flexible digital interfacing options. Consider the internal clock feature if external clock generation is undesirable. Verify that the ±3 V input range aligns with the application signal levels.

Part Context

The AD7871KN belongs to the AD7871/AD7872 family of LC2MOS sampling ADCs. This series is designed for applications requiring fast, complete 14-bit conversion capabilities with low power consumption and versatile microprocessor interfaces.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.