AD7820LNZ

Overview

The AD7820LNZ 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 type with parallel data interface. The device operates on a typical single supply voltage of 5 V, with digital and analog power supplies both rated at 5 V. It supports an external reference voltage of 4.75 V and has a maximum power dissipation of 40 mW. The component is housed in a 20-pin PDIP package designed for through-hole mounting. It functions within a temperature range of -40°C to +85°C.

Feature Summary

• Half-flash architecture provides high-speed conversion capabilities suitable for demanding applications.
• Parallel output interface allows direct connection to microprocessors and digital logic systems.
• Single-supply operation simplifies power distribution requirements in embedded designs.

Applications

• Industrial control systems requiring precise signal acquisition
• Medical equipment utilizing analog sensor data digitization
• Test and measurement instruments needing fast ADC response

Procurement Notes

Verify the specific suffix 'LNZ' against the manufacturer's current datasheet to confirm pinout compatibility and RoHS compliance status. Ensure that the ordering documentation explicitly lists the PDIP-20 package variant, as other suffixes may indicate different physical footprints or performance grades. Cross-reference the part number with official distributor catalogs to validate availability and authenticity before finalizing procurement plans.

Selection Notes

Select this component when an 8-bit resolution and parallel interface are required for cost-effective data acquisition. Consider the 40 mW power dissipation limit during thermal design. Verify that the system can accommodate the 5 V supply requirement and external reference configuration. Evaluate the through-hole mounting constraint against PCB layout capabilities and mechanical assembly processes.

Part Context

The AD7820LNZ belongs to the AD7820 series of analog-to-digital converters from Analog Devices. This series is characterized by its half-flash architecture, balancing speed and power consumption. The LNZ suffix typically denotes a lead-free, RoHS-compliant version in the PDIP package. It serves as a foundational component for systems requiring moderate resolution and fast conversion rates without the complexity of serial interfaces.

Replacement Considerations

TLC0820AIFN is documented as a similar alternative part number.