**ADG408BRUZ: A Comprehensive Technical Overview of the 8-Channel Multiplexer IC**

The ADG408BRUZ is a monolithic, CMOS-based **8-channel analog multiplexer** designed to handle a wide range of analog switching applications. As a cornerstone component in signal routing and data acquisition systems, its primary function is to select one of eight independent input signals and connect it to a common output, under the control of a 3-bit binary address. This device is renowned for its precision, low power consumption, and robust performance in both industrial and commercial environments.

Housed in a compact TSSOP-16 package, the ADG408BRUZ is engineered for **low on-resistance (typically 5 Ω)** and minimal on-resistance flatness, which are critical parameters for maintaining signal integrity and minimizing distortion in the transmitted analog signal. The device operates over a broad power supply range, from ±5V to ±20V for dual supplies or +10V to +30V for a single supply, offering significant flexibility in system design. A key feature is its **break-before-make switching action**, which prevents momentary shorting between channels during switching transitions, thereby protecting both the signal sources and the multiplexer itself.

The internal architecture consists of eight CMOS switches, a decoder circuit for channel selection, and level-shifting logic that allows the TTL/CMOS-compatible digital control inputs (A0, A1, A2, and EN) to control the high-voltage analog switches. The enable (EN) pin is used to disable all channels, setting the output to a high-impedance state, which is essential for bus-oriented applications. Furthermore, the ADG408BRUZ exhibits **very low power dissipation (typically < 0.1 µW)** and features **latch-up immunity**, ensuring reliable operation even in the presence of overvoltage conditions on the analog inputs.

Typical applications for this multiplexer are extensive and include:

* **Precision Data Acquisition Systems (DAQ)** for routing sensor inputs to a single ADC.

* **Audio and Video Signal Routing** in communication and broadcasting equipment.

* **Automated Test Equipment (ATE)** for connecting multiple test points to measurement instruments.

* **Battery-Powered Systems** where its low power consumption is a major advantage.

* **Sample-and-Hold Circuits** and programmable gain amplifiers.

ICGOOODFIND: The ADG408BRUZ stands out as a highly reliable and versatile solution for analog signal multiplexing. Its combination of low on-resistance, wide voltage range, and robust digital control interface makes it an excellent choice for designers seeking performance and integration in demanding measurement and signal processing systems.

**Keywords:** Analog Multiplexer, Low On-Resistance, Break-Before-Make, CMOS Switches, Latch-Up Immunity.