AD7872AN

Overview

The AD7872AN is a complete monolithic 14-bit analog-to-digital converter (ADC) fabricated in LC2MOS technology. It features a successive approximation architecture with an integrated track-and-hold amplifier, a 3 V buried Zener reference, and a laser-trimmed internal clock. The device operates from ±5 V power supplies and accepts bipolar input signals within a ±3 V range. It provides a throughput rate of 83 kSPS with a typical power dissipation of 50 mW. The AD7872 supports serial data output formats compatible with modern microprocessors and digital signal processors.

Feature Summary

• Integrated 3 V buried Zener voltage reference requiring minimal external decoupling
• Self-contained laser-trimmed internal clock eliminates external timing components
• Serial interface optimized for direct connection to microprocessors and DSPs
• High-speed track-and-hold amplifier ensures accurate conversion of full-power signals

Applications

• Digital signal processing systems
• High speed modem implementations
• Speech recognition and synthesis equipment
• Spectrum analysis instrumentation
• DSP servo control loops

Procurement Notes

Verify the specific suffix AN against the manufacturer's current ordering guide to confirm package type and temperature range specifications. Ensure compatibility with existing system power rails and logic levels before finalizing procurement orders.

Selection Notes

Select this component when a dedicated serial interface ADC is required without external clock generation circuitry. Consider the AD7871 if parallel or byte-mode data access is necessary instead of serial-only transmission. Evaluate thermal performance requirements against the specified maximum power dissipation limits.

Part Context

This part belongs to the AD7871/AD7872 family of complete 14-bit sampling ADCs. While the AD7871 offers multiple data output formats including parallel and byte modes, the AD7872 variant is restricted to serial output only. Both devices share identical core analog performance characteristics and internal reference structures.

Replacement Considerations

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