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AD7248AAR

AD7248AAR Description

The AD7248AAR from Analog Devices Inc. is a 12-bit voltage-output digital-to-analog converter (DAC) designed for precision signal generation in demanding industrial and instrumentation applications. Housed in a 20-pin SOIC package, this obsolete but historically significant DAC offers a parallel data interface and operates with dual analog supply voltages (±10.8V to ±16.5V) and a digital supply (10.8V to 16.5V). It features a fast settling time of 7µs, making it suitable for dynamic control systems. The internal reference simplifies design integration, while its ±1 LSB max INL/DNL ensures high linearity. Part of the DACPORT® series, it targets applications requiring robust performance in harsh environments.

AD7248AAR Features

• 12-bit resolution with ±1 LSB max integral/differential non-linearity (INL/DNL) for high accuracy.
• Parallel data interface for straightforward microcontroller interfacing.
• Wide supply range: ±10.8V to ±16.5V (analog) and 10.8V to 16.5V (digital) for flexible system integration.
• Fast settling time (7µs) enables rapid response in closed-loop systems.
• Internal reference eliminates external components, reducing board space.
• Surface-mount 20-SOIC package for compact PCB layouts.
• Industrial-grade reliability with MSL 1 (unlimited) moisture sensitivity.

AD7248AAR Applications

• Industrial automation: Precision voltage generation for PLCs and motor control.
• Test and measurement equipment: Calibration and signal synthesis in benchtop instruments.
• Process control systems: Analog output modules for sensors and actuators.
• Legacy system maintenance: Replacement or repair of older designs using parallel-interface DACs.
• Audio/video signal processing: High-fidelity analog output stages (though newer DACs may offer better performance).

Conclusion of AD7248AAR

The AD7248AAR is a high-precision, 12-bit DAC optimized for industrial and instrumentation applications requiring fast settling, wide supply ranges, and robust performance. While now obsolete, its parallel interface and internal reference make it a practical choice for legacy systems or designs prioritizing simplicity. Engineers seeking modern alternatives may explore newer serial-interface DACs, but the AD7248AAR remains a reliable solution for specific high-voltage, high-speed requirements.