AD779JDZ

Overview

The AD779JDZ is a monolithic 14-bit analog-to-digital converter (ADC) from Analog Devices, belonging to the AD779 family. It integrates a sample-hold amplifier, microprocessor-compatible bus interface, voltage reference, and clock generation circuitry into a single chip. The device operates at a sampling rate of 128 kSPS with a full power bandwidth of 1 MHz. It features a 16-bit parallel data interface and supports both bipolar (two's complement) and unipolar (straight binary) input modes. The component is housed in a 28-pin PDIP package and is characterized for operation within a temperature range of 0°C to +70°C.

Feature Summary

• Integrates complete signal chain including sample-hold amplifier, reference, and clock generation
• Supports high-speed 128 kSPS conversion rates with wide bandwidth capabilities
• Provides flexible digital interface compatibility via 16-bit parallel bus architecture
• Offers selectable input coding formats for both bipolar and unipolar signal ranges

Applications

• High-speed data acquisition systems requiring precise analog-to-digital conversion
• Industrial process control applications utilizing parallel microprocessor interfaces
• Test and measurement equipment demanding low latency and high resolution
• Automated inspection systems processing fast-changing analog sensor signals

Procurement Notes

Verify the specific suffix JDZ against official Analog Devices documentation to confirm pinout, temperature grade, and packaging details. Ensure the design-in process accounts for the 16-bit parallel interface requirements and external power supply specifications. Confirm availability status as legacy components may have limited production runs or require alternative sourcing strategies.

Selection Notes

Select this component when a high-speed 14-bit resolution is required alongside a parallel interface for direct microprocessor connection. Consider the integrated reference and clock features to simplify board layout compared to discrete solutions. Evaluate the 128 kSPS throughput against system bandwidth needs and ensure the 28-pin PDIP package fits the mechanical constraints of the target enclosure.

Part Context

The AD779JDZ is part of the AD779 series of complete sampling ADCs. This family is designed for applications needing rapid conversion speeds without sacrificing resolution. The device serves as a bridge between high-speed analog signals and digital processing systems, offering a compact solution that reduces component count by integrating essential support circuits directly onto the silicon die.

Replacement Considerations

The AD679JNZ is documented as a direct substitute within the same performance class. Verify electrical compatibility and pin alignment before substitution. Other members of the AD779 family may offer different interface widths or resolutions.