AD779KNZ

Overview

The AD779KNZ is a 14-bit resolution Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It utilizes a flash architecture and features a parallel digital interface for data output. The device supports single-ended voltage input signals and includes an internal sample-and-hold configuration with a 1:1 ratio. It operates within a commercial temperature range of 0°C to +70°C and requires dual power supplies, specifically ±12V for analog circuits and 5V for digital logic. The component is housed in a 28-pin Plastic Dual In-line Package (PDIP) designed for through-hole mounting.

Feature Summary

• Integrates a 14-bit flash conversion architecture with a built-in sample-and-hold circuit for direct signal acquisition.
• Provides a parallel data interface for high-speed digital communication with host processors.
• Supports single-ended voltage inputs without requiring external differential conditioning.

Applications

• Industrial process control systems requiring moderate precision analog signal digitization.
• General-purpose data acquisition modules utilizing parallel bus architectures.
• Test and measurement equipment interfacing with single-ended sensor outputs.

Procurement Notes

Verify the current manufacturing status before procurement, as public records indicate this specific part number may be obsolete or discontinued. Confirm that the required 28-pin PDIP package and parallel interface are compatible with the target PCB layout and controller capabilities. Ensure supply chain sources provide genuine Analog Devices components to guarantee electrical specifications and reliability standards are met.

Selection Notes

Select this component only if the application design mandates a parallel interface and a 14-bit resolution level. Evaluate whether the ±12V analog supply requirement aligns with the system's available power rails. Consider alternative modern ADCs with serial interfaces if pin count reduction or lower power consumption is a priority for the final design.

Part Context

This component belongs to the AD779 family of analog-to-digital converters produced by Analog Devices. While other members of this series, such as the AD7790 and AD7792, utilize sigma-delta modulation and serial interfaces, the AD779KNZ specifically employs a flash architecture. This distinction results in different performance characteristics regarding speed versus noise and power consumption compared to the delta-sigma variants.

Replacement Considerations

Public documentation identifies the AD779JNZ as a direct substitute for the AD779KNZ. Verify functional equivalence and availability through official manufacturer channels before implementing any substitution in existing designs.