vintage Analog Devices AD571KD, a high-reliability, 10-bit ADC

Manufacturer: The "AD" prefix points to Analog Devices, a major semiconductor company specializing in data conversion and signal processing technologies.

​Part Number: The primary part number is AD571KD.

​AD571 is a specific 10-bit Analog-to-Digital Converter (ADC). This means it takes an analog voltage signal and converts it into a 10-bit digital value.

​The "K" in the suffix indicates a specific grade or performance level, likely a high-end or military-grade variant.

​The "D" indicates the package type, which is a CERDIP (Ceramic Dual In-line Package). The gold lid is a telltale sign of a hermetic, ceramic package used for high-reliability components.

​Date Code: The number 8331 is the date code, indicating the chip was manufactured in the 31st week of 1983.

​Package: The chip is in a ceramic package with a gold top, which is characteristic of components designed for high-reliability applications, such as in military or aerospace electronics.