**ADG509FBRNZ: A Comprehensive Technical Overview of the 4-Channel/Dual 2-Channel Multiplexer**

The ADG509FBRNZ is a precision monolithic CMOS device that functions as a **4-channel single-ended multiplexer or a dual 2-channel multiplexer**, offering designers a versatile solution for a wide range of signal routing applications. Manufactured by Analog Devices, this IC is engineered to provide high performance in data acquisition systems, automated test equipment (ATE), avionics, and communication systems where accurate and reliable signal switching is paramount.

A key architectural feature of the ADG509FBRNZ is its **dual supply operation capability**, supporting a broad range from ±5V to ±20V, or a single supply from +5V to +36V. This flexibility makes it suitable for interfacing with both bipolar signals and higher voltage single-ended systems. The device boasts **low on-resistance (typically 80Ω)**, which is exceptionally flat across the full input signal range, minimizing distortion and error in the transmitted signal. This is critical for maintaining signal integrity in precision measurement applications.

The multiplexer is designed with **TTL and CMOS-compatible digital inputs**, ensuring easy interfacing with modern microcontrollers, FPGAs, and digital logic without requiring additional level-shifting circuitry. The enhanced latch-up immunity inherent in the CMOS construction provides robust protection against unwanted triggering, a vital feature in electrically noisy environments.

Furthermore, the ADG509FBRNZ features **break-before-make switching action**, which prevents momentary shorting between channels during switching transitions. This protects both the signal sources and the multiplexer itself from potential damage. The device also offers very low power consumption and leakage currents, which is essential for battery-powered or power-sensitive portable instrumentation.

ICGOOODFIND: The ADG509FBRNZ stands out as a highly reliable and flexible analog multiplexer, distinguished by its **wide supply voltage range, low and flat on-resistance, and robust digital control interface**. It is an optimal choice for designers seeking precision signal routing in demanding industrial, automotive, and telecommunications systems.

**Keywords:** Analog Multiplexer, Low On-Resistance, Break-Before-Make, Dual Supply Operation, CMOS-Compatible.