AD7856ARZ-REEL7

Overview

The AD7856ARZ-REEL7 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 input throughput rate of 285 kSPS. The device features eight single-ended or four pseudo-differential input channels with a sampling scheme that acquires signals in 500 ns. It utilizes a successive approximation register (SAR) architecture and includes self-calibration and system calibration options to maintain accuracy over time and temperature variations. Power consumption is typically 60 mW during normal operation and drops to 5.1 mW in power-down mode at 10 kSPS. The component is housed in a 24-lead SOIC package.

Feature Summary

• Supports flexible serial I/O interfaces compatible with SPI, QSPI, 8051, and microprocessor systems.
• Includes automatic power-down capabilities after conversion for optimized energy efficiency.
• Features on-chip self-calibration and system calibration logic to ensure long-term precision.

Applications

• Battery-powered personal digital assistants
• Medical instrumentation devices
• Mobile communication equipment
• Pen computers
• High-speed modem systems

Procurement Notes

Verify the REEL7 suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the specific grade version matches the required operating temperature range, as A-grade parts support -40°C to +105°C while K-grade parts are limited to 0°C to +105°C. Ensure the ordering documentation explicitly lists the AD7856ARZ-REEL7 part number to avoid confusion with standard tube-packaged variants.

Selection Notes

Select this component for designs requiring a single 5 V supply and multi-channel data acquisition. The 14-bit resolution and 285 kSPS throughput make it suitable for moderate-speed applications. Consider the available channel configurations, which allow for either eight single-ended or four pseudo-differential inputs. Verify that the external reference voltage requirements align with the internal reference capabilities ranging from 1.2 V to VDD.

Part Context

This component belongs to the AD7856 family of 14-bit ADCs designed for low-power, high-speed applications. It shares architectural similarities with other members of the series but differs in packaging and reel specifications. The AD7856ARZ variant specifically denotes the SOIC package form factor. The REEL7 suffix identifies the specific bulk packaging method used for automated assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.