AD7819YRZ

Overview

The AD7819YRZ is an 8-bit successive approximation analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 2.7 V to 5.5 V supply and supports throughput rates up to 200 kSPS with a maximum conversion time of 4.5 µs. The device features an on-chip track-and-hold circuit, internal clock oscillator, and an 8-bit parallel interface compatible with microprocessors and DSPs. It is housed in a 16-lead Small Outline IC (SOIC) package. DC accuracy specifications include ±0.5 LSB differential nonlinearity, integral nonlinearity, and gain error. Power consumption is 17.5 mW max at 5 V normal operation, reducing significantly via automatic power-down modes.

Feature Summary

• Automatic power-down mode reduces average power consumption at lower throughput rates by powering down after each conversion.
• Integrated track-and-hold amplifier and charge redistribution DAC architecture enable high-speed sampling without external timing components.
• 8-bit wide parallel interface allows direct connection to microprocessors and DSPs using minimal address decoding logic.
• Single-supply operation simplifies system design by eliminating the need for dual voltage rails.

Applications

• Microprocessor-based data acquisition systems
• Battery-powered instrumentation requiring low power consumption
• Industrial process control monitoring
• DSP front-end signal conditioning

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Check for RoHS compliance status as indicated in official documentation. Confirm package integrity upon receipt. Note that specific ordering suffixes may denote package variations; ensure the selected variant matches the required footprint. Review datasheet revisions for any parameter updates before final integration.

Selection Notes

Select this component when an 8-bit resolution and 200 kSPS speed are sufficient for the application. Consider the SOIC-16 package for surface-mount assembly requirements. Evaluate power constraints to determine if automatic power-down mode meets efficiency targets. Ensure the input signal range aligns with the available reference voltage options between 1.2 V and VDD.

Part Context

The AD7819 belongs to the AD7819 series of 8-bit sampling ADCs from Analog Devices. It shares architectural similarities with other SAR ADCs in the portfolio but is distinct in its parallel interface configuration. The YRZ suffix indicates the SOIC-16 package variant with lead-free soldering and RoHS compliance, differentiating it from DIP or TSSOP versions within the same functional family.

Replacement Considerations

Direct pin-compatible replacements within the same package should be verified against the latest Analog Devices product selector guide. Cross-referencing electrical parameters such as input voltage range and interface type is essential. No specific substitute part numbers are confirmed in the provided source material.