**ADG431BR: A High-Performance, Quad SPST ±15 V Analog Switch**

In the realm of precision signal routing and system design, the performance of an analog switch is paramount. The **ADG431BR from Analog Devices** stands out as a premier solution, engineered to meet the rigorous demands of applications requiring high accuracy, exceptional reliability, and robust performance across a wide voltage range. This integrated circuit is a **monolithic quad, single-pole/single-throw (SPST) analog switch**, designed to handle analog signals swinging up to **±15 V**, making it an indispensable component in industrial, automotive, and instrumentation systems.

A defining characteristic of the ADG431BR is its **low on-resistance**, typically just 35 Ω. This minimal resistance is remarkably flat across the entire signal range, ensuring minimal distortion and signal loss when the switch is closed. This is critical for maintaining signal integrity in precision measurement and data acquisition systems, where every millivolt counts. Complementing this is its **fast switching speed**, enabling rapid multiplexing of signals in automated test equipment (ATE) and communication systems without introducing significant delays.

The device is constructed on an **advanced iCMOS® (industrial CMOS) process**, a technology that allows for the combination of high voltage operation with low power consumption and high integration. This process empowers the ADG431BR to operate seamlessly with **dual supplies from ±5 V to ±15 V or a single supply from +5 V to +30 V**, offering unparalleled design flexibility. Each switch conducts equally well in both directions when on and blocks signal flow effectively when off, thanks to its excellent **off-isolation** and very low **charge injection**, which minimizes transients and errors when switching sensitive analog signals.

Furthermore, the ADG431BR is designed with robustness in mind. It features **latch-up immunity** and **ESD protection** up to 2 kV, safeguarding the device and the larger system from voltage spikes and electrostatic discharge events common in harsh electrical environments. The TTL/CMOS-compatible digital inputs simplify interface with modern microcontrollers and logic circuits, streamlining the design process.

**ICGOOODFIND**: The ADG431BR is a superior quad SPST analog switch that excels through its combination of high-voltage handling, low and flat on-resistance, fast switching, and robust iCMOS® construction. It is an optimal choice for designers who require precision, reliability, and flexibility in their signal path.

**Keywords**: Analog Switch, Low On-Resistance, iCMOS®, ±15 V, High Performance.