**ADG409BRUZ: A Comprehensive Technical Overview of the Precision Quad 2:1 Multiplexer IC**

The ADG409BRUZ is a monolithic, CMOS-based device integrating four independent 2-channel single-pole/double-throw (SPDT) analog switches, configured as a quad 2:1 multiplexer/demultiplexer. Engineered for precision signal routing in demanding applications, this IC stands out for its **exceptionally low on-resistance (Ron) of just 35 Ω typical** and minimal on-resistance flatness across the specified analog input range. This performance is critical in ensuring signal integrity by minimizing attenuation and distortion when switching analog voltages.

A key architectural feature of the ADG409BRUZ is its **break-before-make switching action**, which is essential for preventing momentary shorting between channels during the transition phase. This protects both the signal sources and the multiplexer itself from potential damage or erroneous readings. The device operates from a single supply voltage ranging from +10.8 V to +16.5 V or from dual supplies of ±5 V, making it versatile for various system-level power configurations. Furthermore, it is **designed for both analog and digital signal switching**, handling bipolar analog signals up to the supply rails, which is a significant advantage over devices with larger headroom requirements.

The digital interface is TTL/CMOS compatible, simplifying control through a single digital address input (A0) and an enable pin (EN) that activates all four switches simultaneously. This allows for straightforward integration with microcontrollers, FPGAs, and other digital logic systems. The ADG409BRUZ also boasts **very low power consumption, typically under 0.1 μW**, due to its advanced CMOS construction, making it suitable for portable and battery-powered equipment.

In terms of performance metrics, the device exhibits low leakage currents (less than 100 pA) and fast switching times (tON typically 150 ns), enabling its use in high-speed data acquisition systems. It is also characterized by its **high reliability and robustness**, with built-in latch-up immunity and ESD protection, ensuring stable operation in harsh industrial environments.

Typical applications span a wide spectrum, including:

* **Precision Data Acquisition Systems** for routing sensor inputs to an ADC.

* **Audio and Video Signal Routing** where low distortion is paramount.

* **Automated Test Equipment (ATE)** for multiplexing test signals.

* **Communication Systems** and battery-operated medical instrumentation.

ICGOODFIND: The ADG409BRUZ distinguishes itself as a high-performance, precision multiplexer solution. Its combination of **low on-resistance, wide voltage range operation, break-before-make switching, and ultra-low power consumption** makes it an optimal choice for design engineers who prioritize signal fidelity, system reliability, and power efficiency in their analog signal path designs.

**Keywords:** Low On-Resistance, Break-Before-Make, Analog Multiplexer, CMOS SPDT Switch, Low Power Consumption