AD7872BR-REEL

Overview

The AD7872BR-REEL 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 features an internal track-and-hold amplifier, successive approximation register architecture, and a laser-trimmed 3 V buried Zener reference. It provides a serial digital interface with an 83 kSPS throughput rate and a typical data access time of 57 ns. Power dissipation is typically 50 mW.

Feature Summary

• Serial-only data output format for simplified microprocessor interfacing
• Integrated on-chip clock oscillator eliminating external timing components
• Internal temperature-compensated 3 V buried Zener voltage reference
• High dynamic performance including 80 dB signal-to-noise ratio

Applications

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

Procurement Notes

Verify that the ordering suffix 'REEL' corresponds to tape-and-reel packaging rather than tube packaging when sourcing this specific variant. Confirm the 'B' version designation indicates the industrial temperature range of −40°C to +85°C. Ensure the component matches the 16-pin SOIC outline dimensions specified in the datasheet.

Selection Notes

Select the AD7872 over the AD7871 if a serial interface is required, as the AD7871 offers parallel or byte outputs. Verify that the system can accommodate the ±5 V supply rails and the ±3 V input voltage range. Consider the 57 ns data access time for bus synchronization requirements and ensure the serial clock polarity aligns with the host controller logic.

Part Context

This component belongs to the AD7871/AD7872 family of complete 14-bit sampling ADCs. Both parts share identical core specifications and pinouts but differ in their digital interface capabilities. The AD7872 is specifically designed for applications requiring a serial data stream, whereas the AD7871 supports parallel and byte formats.

Replacement Considerations

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