**ADG904SCPZ-EP: A Radiation-Tolerant, 4-Channel CMOS Analog Multiplexer for High-Reliability Aerospace and Defense Systems**

In the demanding environments of aerospace and defense, electronic components are subjected to extreme conditions that can cripple standard commercial parts. **High levels of radiation, wide temperature fluctuations, and severe mechanical stress** necessitate a class of electronics designed specifically for maximum reliability. The ADG904SCPZ-EP from Analog Devices stands as a paramount solution in signal routing, embodying the rigorous standards required for mission-critical applications.

This component is a **monolithic, CMOS-based, 4-channel single-pole/single-throw (SPST) analog multiplexer**. Its primary function is to accurately and reliably switch high-fidelity analog signals from multiple inputs to a common output, a task essential for data acquisition systems, sensor interfaces, and communication payloads in satellites, spacecraft, and avionics.

The defining characteristic of the ADG904SCPZ-EP is its **exceptional radiation tolerance**. It is specifically hardened to withstand the harsh conditions of space and high-altitude flight, including:

* **Latch-Up Immune (>100 MeV-cm²/mg):** The device is immune to single-event latch-up (SEL), a destructive phenomenon that can be triggered by high-energy particles.

* **Low Single-Event Effects (SEE) Susceptibility:** Its design minimizes disruptions from single-event transients (SETs) or upsets (SEUs), ensuring continuous, error-free operation.

* **Total Ionizing Dose (TID) Resilience:** Rated for **TID levels up to 100 krad(Si)**, the multiplexer can endure prolonged exposure to ionizing radiation without significant performance degradation.

Beyond its rad-hard properties, the ADG904SCPZ-EP is engineered for **enhanced performance and reliability (EP)**. It operates flawlessly across an **extended industrial temperature range of -55°C to +125°C**, guaranteeing functionality from the cold vacuum of space to the heat within a military-grade enclosure. Furthermore, it offers **low on-resistance (typically 4.5 Ω)** and **flat on-resistance across the signal range**, which minimizes distortion and ensures signal integrity for precision analog measurements. Its low power consumption is also critical for power-sensitive satellite systems.

**ICGOODFIND:** The ADG904SCPZ-EP is not merely a multiplexer; it is a **critical enabling technology for high-reliability systems**. Its radiation-hardened design, robust construction, and analog performance make it an indispensable component for engineers designing avionics, satellite subsystems, and military ground systems where failure is not an option. It effectively bridges the gap between complex analog sensor arrays and digital processing units with unwavering reliability.

**Keywords:** Radiation-Tolerant, Analog Multiplexer, Aerospace and Defense, High-Reliability, CMOS