AD7854ARZ-REEL

Overview

The AD7854ARZ-REEL is a high-speed, low-power 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It operates from a single 3 V to 5.5 V supply and features a throughput rate of 200 kSPS with a conversion time of 4.6 µs. The device utilizes a charge redistribution Successive Approximation Register (SAR) architecture and includes an internal track-and-hold amplifier with a 500 ns acquisition time. It supports flexible parallel I/O interfaces and offers system and self-calibration capabilities to maintain accuracy over temperature variations.

Feature Summary

• Integrated self-calibration and system calibration functions for enhanced long-term accuracy
• Flexible power management options including automatic power-down after conversion
• Pseudo-differential analog input scheme supporting unipolar and bipolar signal ranges

Applications

• Battery-powered systems such as personal digital assistants and mobile communications
• Medical instruments requiring precise data acquisition
• Instrumentation and control systems
• High-speed modems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Ensure compatibility with existing board layouts regarding pin configurations and voltage levels before procurement.

Selection Notes

Select this component for applications requiring high-speed sampling at 200 kSPS with low power consumption. Consider the AD7854L variant if lower power dissipation is prioritized over maximum speed. Verify interface requirements for the flexible parallel bus configuration.

Part Context

This part belongs to the AD7854/AD7854L family of 12-bit sampling ADCs. The standard AD7854 variant is optimized for higher speed performance compared to the AD7854L, which focuses on reduced power consumption while maintaining 12-bit resolution.

Replacement Considerations

Check for direct substitutes within the AD7854 series or other 12-bit SAR ADCs from Analog Devices. Ensure functional equivalence in terms of interface protocol, pinout, and calibration features.