AD7820LRZ-REEL

Overview

The AD7820LRZ-REEL is a monolithic, high-speed, 12-bit analog-to-digital converter manufactured by Analog Devices Inc. It features a sampling rate of 500 kSPS and utilizes a successive approximation architecture to achieve accurate signal conversion. The device incorporates an internal high-speed track-and-hold amplifier and a reference input buffer, which simplifies system design by reducing the number of external components required. It operates from a single +5 V power supply and includes a serial output interface compatible with standard microprocessors. The component is housed in a 20-pin narrow SOIC package and is designed for applications requiring low power consumption and high accuracy.

Feature Summary

• Integrated track-and-hold amplifier and reference buffer for simplified circuit design
• Serial output interface compatible with standard microprocessor systems
• Single +5 V power supply operation with low power consumption characteristics

Applications

• Industrial process control systems
• Portable instrumentation
• Data acquisition systems

Procurement Notes

Verify the specific suffix 'REEL' indicates tape and reel packaging when ordering. Confirm the 'L' variant meets temperature range requirements for your application environment. Ensure compatibility with existing PCB footprints for the 20-pin SOIC package. Cross-reference the datasheet revision date to confirm pinout consistency with current designs.

Selection Notes

Select this component when a 12-bit resolution at 500 kSPS is required with minimal external support circuitry. Consider the single-supply operation if power constraints limit voltage options. Evaluate the serial interface speed against microprocessor capabilities to ensure adequate throughput. Compare power dissipation specifications against thermal management capabilities of the target enclosure.

Part Context

This part belongs to the AD7820 family of 12-bit ADCs. It shares architectural similarities with other members but differs in packaging and specific electrical tolerances. The LRZ designation specifies the lead-free, RoHS-compliant narrow SOIC package variant. Understanding its position within the broader ADC portfolio helps in identifying alternative parts with different pin counts or speeds if system requirements change.

Replacement Considerations

Direct replacements include other AD7820 variants such as the AD7820ARZ or AD7820KNZ, provided pinouts and electrical specifications match the original design constraints. Verify that substitute parts maintain the same serial interface timing and power supply requirements to avoid redesigning the host system.