AD7528AQ

The Analog Devices AD7528AQ is a monolithic dual 8-bit multiplying digital-to-analog converter (DAC) from the AD7528 family, integrating two matched CMOS DAC channels on a single die. Each channel accepts a wide-range variable reference voltage, supporting four-quadrant multiplication for both unipolar and bipolar output operation. The device features TTL/CMOS-compatible logic inputs, a double-buffered interface structure that allows simultaneous or independent updating of the two DAC outputs, and low power dissipation characteristic of the CMOS process. Housed in a hermetic ceramic dual-in-line package (CDIP), the AD7528AQ provides enhanced environmental resilience and extended operating temperature range, making it suited for demanding embedded signal processing paths where precise gain control, attenuation, or waveform generation under varying reference conditions is required.

Typical deployments include industrial process control systems, automated test equipment, and motion control platforms where the dual channels perform programmable offset and span adjustment or act as digitally controlled precision attenuators in closed-loop servo architectures. In aerospace and defense applications, the multiplying DAC finds use in calibration circuits, sonar and radar signal conditioning, and navigation subsystems that demand high reliability and long-term stability. From a procurement perspective, the ceramic DIP configuration aligns with military and high-reliability design standards, but supply continuity should be evaluated carefully; legacy linear components in hermetic packages can face long lead times or eventual obsolescence. Engineering and supply-chain teams commonly verify active lifecycle status and consider authorized distribution sources to secure traceable, full-temperature-grade inventory for extended program lifecycles.