AD7872KN

Overview

The AD7872KN is a complete monolithic 14-bit analog-to-digital converter (ADC) fabricated in LC2MOS technology. It operates from ±5 V power supplies and accepts bipolar input signals within the ±3 V range. The device integrates a track-and-hold amplifier, successive approximation ADC, and a 3 V buried Zener reference. It provides an 83 kSPS throughput rate with a typical power dissipation of 50 mW. The AD7872 features a serial digital interface only, utilizing SSTRB, SCLK, and SDATA pins for data transmission.

Feature Summary

• Serial output architecture optimized for microprocessor interfacing
• Integrated laser-trimmed internal clock eliminates external timing components
• Self-contained design includes track-and-hold amplifier and voltage reference

Applications

• Digital signal processing systems
• High speed modem applications
• Speech recognition and synthesis equipment
• DSP servo control loops

Procurement Notes

Verify the specific ordering suffix KN against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure the procurement documentation matches the exact part number to avoid confusion with parallel interface variants like the AD7871. Confirm RoHS compliance status through official distributor channels prior to finalizing orders.

Selection Notes

Select this component when a serial interface is required for space-constrained designs. The AD7872 differs from the AD7871 by offering serial output exclusively, whereas the AD7871 supports parallel and byte modes. Verify that the system logic levels are compatible with the specified TTL-compatible inputs and outputs before integration into the circuit design.

Part Context

This component belongs to the AD7871/AD7872 family of 14-bit sampling ADCs. While the AD7871 offers multiple data output formats including parallel and byte options, the AD7872 variant is strictly limited to serial data transmission. Both devices share identical core conversion specifications and internal architectures.

Replacement Considerations

The AD7871 serves as a functional alternative if parallel or byte-mode data access is required instead of serial communication. Other members of the AD787x series may offer different resolution or channel counts but require verification of pin compatibility and electrical specifications.