AD7875KR-REEL

Overview

The AD7875KR-REEL is a complete monolithic 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It integrates a track-and-hold amplifier, an 8 μs ADC core, and a laser-trimmed internal clock, eliminating the need for external timing components. The device operates from ±5 V power supplies and accepts a unipolar analog input range of 0 V to +5 V. It features versatile digital interface options including parallel, byte, and serial data formats with a typical data access time of 57 ns. Power consumption is typically 60 mW, supporting efficient system design.

Feature Summary

• Integrates a 3 V buried Zener reference and laser-trimmed internal clock on a single chip
• Supports multiple data output formats: 12-bit parallel, two 8-bit bytes, or serial transfer
• Features a fast 2 μs track-and-hold amplifier for accurate signal acquisition
• Provides low power operation suitable for battery-powered applications

Applications

• Data acquisition systems requiring 12-bit resolution
• Industrial process control monitoring
• Portable instrumentation and test equipment

Procurement Notes

Verify that the ordering suffix 'KR' corresponds to the commercial temperature range (0°C to +70°C) and SOIC-24 package as specified in the manufacturer's documentation. Confirm that the '-REEL' suffix indicates tape and reel packaging rather than tube packaging when placing orders. Ensure compatibility with standard ±5 V supply rails before procurement.

Selection Notes

Select this component when a unipolar 0 V to +5 V input range is required, distinguishing it from the bipolar AD7870 or AD7876 variants. Consider the integrated reference and clock if board space is limited. Verify that the 57 ns access time meets the microprocessor bus requirements. Check if the commercial temperature grade suffices for the operating environment.

Part Context

This part belongs to the AD7870/AD7875/AD7876 family of 12-bit sampling ADCs. While sharing the same core architecture and pinout, the AD7875 is specifically defined by its unipolar input range. Other family members like the AD7870 handle bipolar signals, offering designers flexibility within the same footprint for different voltage requirements.

Replacement Considerations

Publicly confirmed substitutes include the AD7875KNZ (DIP package) and AD7875BRZ (industrial temperature range). Verify pin compatibility and ensure the replacement matches the required temperature grade and package style.