AD7777ARZ

Overview

The AD7777ARZ is a quad-channel, 10-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 28-lead SOIC package. The device features a parallel data interface and accepts single-ended inputs with a nominal supply voltage of 5 V. Key electrical specifications include a maximum differential nonlinearity of ±1 LSB, a signal-to-noise ratio of 56 dB minimum, and a power dissipation of 75 mW in normal mode.

Feature Summary

• Simultaneous sampling capability for two channels via control register configuration
• Integrated track-and-hold amplifiers supporting high-frequency input signals
• Configurable BUSY/INT output flag for status monitoring or interrupt generation
• Internal reference output providing a stable bias voltage for analog inputs

Applications

• Digital signal processing systems requiring voice recognition or echo cancellation
• Adaptive filtering applications demanding precise dynamic performance
• Multi-channel data acquisition systems utilizing parallel microprocessor interfaces
• Industrial instrumentation requiring simultaneous channel sampling

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and temperature grade. Confirm RoHS compliance status through official datasheets prior to integration. Ensure component authenticity by sourcing from authorized distribution channels and validating part markings against official specifications.

Selection Notes

Select this component when four independent single-ended channels are required alongside simultaneous dual-channel sampling capabilities. Evaluate the parallel interface requirements against available system bus resources. Consider the 5 V supply constraint and verify that the 10-bit resolution meets the application's accuracy needs relative to higher-resolution alternatives.

Part Context

This device belongs to the AD7776/AD7777/AD7778 family of high-speed SAR ADCs. The AD7777 variant specifically provides four input channels, distinguishing it from the single-channel AD7776 and the eight-channel AD7778. All variants share identical core architecture, timing characteristics, and control logic structures.

Replacement Considerations

Public confirmed substitute part numbers: AD7777ANZ.