AD7856KR-REEL

Overview

The AD7856KR-REEL is a high-speed, low-power 14-bit analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 5 V supply and supports an 8-channel input configuration, accommodating either eight single-ended or four pseudo-differential signals. The device achieves a throughput rate of 285 kSPS with a maximum conversion time of 5.25 ms for the K version. It features self-calibration and system calibration options to maintain accuracy over temperature variations. The component utilizes a flexible serial interface compatible with SPI, QSPI, and microprocessor systems, housed in a 24-lead package.

Feature Summary

• Supports eight single-ended or four pseudo-differential analog inputs via internal multiplexer.
• Includes on-chip self-calibration and system calibration logic to ensure long-term accuracy.
• Features automatic power-down modes to minimize energy consumption during idle periods.
• Provides versatile serial communication interfaces compatible with standard digital protocols.

Applications

• Battery-powered portable instrumentation systems
• Medical diagnostic instruments requiring precise signal acquisition
• Industrial control and data acquisition networks

Procurement Notes

Verify that the specific ordering suffix corresponds to the required temperature grade and packaging format. Confirm the presence of the REEL designation indicates tape-and-reel packaging suitable for automated assembly processes. Ensure compatibility with existing board layouts regarding pin configurations and voltage levels before finalizing procurement orders.

Selection Notes

Select this component when a 14-bit resolution is required alongside multi-channel input capabilities within a single integrated circuit. Consider the K version specifications if the operating environment remains within commercial temperature limits. Evaluate the power management features against system standby requirements to optimize overall energy efficiency during operation.

Part Context

This part belongs to the AD7856 family of 5 V single-supply ADCs. It shares architectural similarities with other members like the AD7856ANZ but differs in package type and temperature rating. The KR variant specifically denotes the SOIC package option with commercial temperature grading, distinguishing it from industrial or wider temperature range alternatives within the same product line.

Replacement Considerations

Direct substitutes include other AD7856 variants such as AD7856ARZ or AD7856ANZ, provided the package style and temperature range meet design constraints. Verify pinout compatibility and electrical specifications before implementing any cross-model replacements in existing hardware designs.