AD7820KR

Overview

The AD7820KR is an 8-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It utilizes a half-flash architecture and features a single-ended input configuration with a parallel digital interface. The device operates on a single 5 V supply, supporting both analog and digital power domains at this voltage level. It is housed in a 20-PLCC surface-mount package and is rated for an industrial operating temperature range from -40°C to +85°C. The component requires an external voltage reference, typically set near 4.75 V, and consumes approximately 40 mW of power during operation.

Feature Summary

• Integrates a track-and-hold circuit with the ADC core for accurate signal sampling.
• Employs a half-flash architecture to achieve high-speed conversion performance.
• Features a parallel data output interface compatible with standard microprocessors.
• Designed for single-supply 5 V operation to simplify power distribution.

Applications

• Industrial process control systems requiring fast analog signal digitization.
• Data acquisition modules for monitoring sensor outputs.
• Test and measurement equipment utilizing parallel bus architectures.

Procurement Notes

Verify current availability status directly with authorized distributors or the manufacturer, as lifecycle changes may affect supply. Confirm that the specific suffix matches the required package type and temperature grade for your design. Ensure compliance with RoHS directives if applicable to your region. Cross-reference the datasheet revision date to confirm technical specifications align with your system requirements before finalizing procurement.

Selection Notes

Select this component when an 8-bit resolution and parallel interface are required for moderate-speed applications. Consider the PLCC package constraints for PCB layout and thermal management. Verify that the external reference voltage capability meets the precision needs of the application. Compare against SAR ADC alternatives if lower power consumption or serial interfaces are preferred over speed.

Part Context

The AD7820KR belongs to the AD7820 family of high-speed ADCs from Analog Devices. This series is characterized by its combination of speed and resolution suitable for general-purpose data conversion tasks. The KR suffix specifically denotes the plastic leaded chip carrier package variant within this product line, distinguishing it from DIP or other package options available in the same functional family.

Replacement Considerations

Publicly confirmed substitute part numbers for the AD7820KR are not available in the provided source material. Evaluate similar 8-bit flash ADCs with parallel interfaces from Analog Devices or other manufacturers, ensuring pin compatibility and electrical parameter alignment.