AD7872KRZ-REEL

Overview

The AD7872KRZ-REEL is a complete monolithic 14-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It utilizes a successive approximation register (SAR) architecture and operates from ±5 V power supplies, accepting bipolar input signals within a ±3 V range. The device features an internal laser-trimmed clock and a 3 V buried Zener reference, eliminating the need for external timing components. It provides a serial digital interface with an 83 kSPS throughput rate and achieves an 80 dB signal-to-noise ratio at a 10 kHz input frequency.

Feature Summary

• Serial data output interface compatible with modern microprocessors and DSPs
• Integrated track-and-hold amplifier for accurate signal acquisition
• Internal temperature-compensated 3 V buried Zener voltage reference
• Self-contained laser-trimmed internal clock oscillator

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 indicates tape-and-reel packaging rather than tube packaging when sourcing this specific part number. Confirm the K version temperature rating of 0°C to +70°C matches the design requirements. Ensure the serial-only interface aligns with the system bus architecture before procurement.

Selection Notes

Select the AD7872 variant specifically when a serial interface is required, as the AD7871 offers parallel options. Verify that the ±5 V supply rails are available in the target design. Consider the 83 kSPS throughput rate against the Nyquist requirement of the input signal bandwidth to ensure adequate sampling performance.

Part Context

This component belongs to the AD7871/AD7872 family of fast, complete 14-bit ADCs. Both devices share identical core specifications but differ in their digital interface configurations. The AD7872 is distinguished by its exclusive serial output capability, whereas the AD7871 supports parallel and byte formats alongside serial.

Replacement Considerations

The AD7872JRZ serves as a direct pin-compatible alternative within the same series. Verify that the J version meets the required commercial temperature range if the K version's specifications are insufficient for the operating environment.