DG303AAK/883B

The DG303AAK/883B is a dual single-pole double-throw (SPDT) CMOS analog switch manufactured by Analog Devices, conforming to the screening and qualification requirements of MIL-STD-883B, Class B. Housed in a hermetically sealed 14-pin ceramic dual in-line package (CDIP), the device delivers low on-resistance, typically in the 30 Ω to 50 Ω range, across a wide analog signal span. Its break-before-make switching action prevents instantaneous short circuits during channel transitions, while the TTL- and CMOS-compatible logic inputs simplify direct interfacing with digital control circuits. The switch operates over dual supplies up to ±18 V or a single positive supply up to 36 V, providing flexibility for bipolar or unipolar signal paths with minimal quiescent power drain.

This component serves in mission-critical signal routing roles such as military avionics, precision data acquisition front ends, and ruggedized industrial control systems where stable analog performance is required across the full -55°C to +125°C temperature range. The /883B suffix denotes a high-reliability screening flow that includes fine and gross leak testing, extended burn-in, and electrical characterization at temperature extremes, making the part well-suited to defense and aerospace platforms with long lifecycle expectations. Procurement and sustaining engineering teams should assess current lead times and active production status, as legacy CDIP-packaged analog switches can experience lifecycle transitions; source control drawings or military slash sheet specifications may be referenced to ensure approved alternates are available for long-term program support.