AD774BBD

The AD774BBD from Analog Devices is a complete, 12-bit analog-to-digital converter (ADC) that integrates an on-chip voltage reference and a 4-channel analog multiplexer in a hermetically sealed ceramic DIP (CDIP) package. Built on a successive approximation register (SAR) architecture, the device delivers typical conversion times of 25 µs and a maximum linearity error of ±½ LSB, outputting 12-bit parallel data with standard microprocessor-compatible control logic. The internal reference and single-ended multiplexer channels—selected via two address pins—reduce external component count, and the part typically operates from a single +5 V supply at low power consumption.

The robust construction and extended temperature range (commonly −55 °C to +125 °C for the “B” grade) position the AD774BBD for mission-critical applications such as flight control systems, radar signal processing, navigation platforms, and high-reliability industrial automation. The hermetic CDIP package provides resistance to moisture and thermal shock, ensuring stable performance in extreme environments. Procurement professionals should treat the AD774 family as a mature, legacy product line with associated obsolescence risk; verifying lifecycle status, available stock, and form-fit-function alternatives is essential for long-term program sustainment. For defense and aerospace designs requiring additional lot traceability and reliability, variants screened to MIL-STD-883 (often identified by suffix codes such as /883) should be evaluated to meet program qualification requirements.