AD7228ACRZ-REEL

Overview

The AD7228ACRZ-REEL is an octal 8-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It integrates eight voltage-mode DACs with output buffer amplifiers and interface logic on a single monolithic chip. The device operates with dual supplies (VDD: 10.8 V to 16.5 V; VSS: −4.5 V to −5.5 V) or a single 15 V supply. Key electrical parameters include a settling time of 5 µs for positive full-scale changes and 7 µs for negative changes, a reference input range of 2 V to 10 V, and a maximum power dissipation of 310 mW. It utilizes a parallel data interface and is housed in a 24-lead SOIC package.

Feature Summary

• Octal architecture containing eight independent 8-bit DACs with integrated output buffer amplifiers.
• LC2MOS fabrication process ensuring high-speed operation and precision analog performance without external trims.
• Microprocessor-compatible interface supporting TTL/CMOS levels with individual latches for each DAC channel.
• Flexible power supply options allowing operation with dual supplies (±5 V nominal) or a single +15 V supply.

Applications

• Automated test equipment requiring multi-channel signal generation.
• Industrial control systems utilizing microprocessor-based architectures.
• Programmable gain amplifier circuits and setpoint controllers.

Procurement Notes

Verify the 'REEL' suffix indicates tape-and-reel packaging rather than tube packaging when ordering. Confirm the 'C' grade designation matches the required static performance specifications, specifically Total Unadjusted Error and Relative Accuracy limits defined in the datasheet. Ensure the supplier provides documentation confirming RoHS compliance status for this specific reel configuration.

Selection Notes

Select the AD7228ACRZ-REEL when eight simultaneous 8-bit conversions are required within a compact footprint. Choose this part over higher-resolution alternatives if system requirements prioritize speed (5 µs settling) and cost-efficiency over precision. Verify that the application can accommodate the 2 kΩ minimum load resistance and that the reference voltage source can handle the varying input impedance during code transitions.

Part Context

This component belongs to the AD7228 series of octal DACs from Analog Devices. It is fabricated using LC2MOS technology, which combines high-speed digital logic with linear-compatible CMOS processes. The device is designed to reduce board space compared to discrete solutions while maintaining reliability in systems requiring multiple converters.

Replacement Considerations

The AD7228ABRZ serves as a direct functional replacement within the same family, offering identical pinouts and specifications but potentially differing in temperature grade or manufacturing lot characteristics. Verify that any substitute maintains the 24-lead SOIC package dimensions and electrical tolerances specified for the AC grade.