AD7228ABQ

Overview

The AD7228ABQ is an octal 8-bit digital-to-analog converter manufactured by Analog Devices Inc. It features a parallel interface and voltage buffered outputs. The device operates within a temperature range of -40°C to +85°C and utilizes a 24-CERDIP package. Key electrical specifications include a settling time of 7 µs, a supply current of 16 mA, and power dissipation of 1 W. It supports analog and digital supply voltages ranging from 10.8 V to 16.5 V and ±5 V. The component offers external reference capability with no shutdown function.

Feature Summary

• Integrates eight independent 8-bit DAC channels within a single CMOS IC
• Provides buffered voltage outputs for direct driving capabilities
• Utilizes R-2R architecture for precise digital-to-analog conversion
• Supports parallel data interface for high-speed operation

Applications

• Industrial process control systems requiring multi-channel signal generation
• Programmable gain amplifier networks
• Variable voltage reference sources
• Waveform generation circuits

Procurement Notes

Verify the specific suffix 'B' against official Analog Devices documentation to confirm performance grade and temperature rating. Ensure the 24-CERDIP package matches the target PCB footprint. Confirm RoHS compliance status as historical data may vary. Validate that the external reference requirement aligns with system design constraints before procurement.

Selection Notes

Select this component when multiple isolated analog outputs are required from a single digital source. The buffered output stage simplifies circuit design by eliminating external op-amps. Consider the parallel interface latency and CERDIP package availability. Evaluate the 16 mA supply current against total system power budgets. Ensure the ±5 V and higher supply rails fit the available power infrastructure.

Part Context

The AD7228ABQ belongs to the AD7228 family of octal DACs. It shares architectural similarities with variants like the AD7228BQ and AD7228ABNZ but differs in package type and specific performance grades. These devices represent legacy CMOS technology designed for robust industrial applications requiring multiple synchronized analog outputs.

Replacement Considerations

The AD7228ABNZ serves as a pin-compatible alternative in a PDIP-24 package. The AD7228BQ offers similar functionality in a CDIP-14 package. Verify mechanical dimensions and thermal characteristics when substituting these parts.