**ADG728BRUZ: A Comprehensive Analysis of the 8-Channel CMOS Analog Multiplexer**

The ADG728BRUZ represents a pinnacle of integration and performance in the realm of analog switching. As an **8-channel single-ended analog multiplexer** fabricated on an advanced CMOS process, it is engineered to provide a versatile and reliable solution for a wide array of signal routing applications, from precision data acquisition systems to battery-powered instrumentation.

At its core, the device functions as a single-pole, eight-throw (SP8T) switch. It selects one of eight independent analog inputs and connects it to a common output, under the control of a **3-bit binary address (A0, A1, A2)** decoded from a serial-to-parallel interface. This serial interface, compatible with SPI, QSPI, and MICROWIRE protocols, offers a significant advantage by drastically reducing the number of digital control lines required from a microcontroller or DSP. This feature is crucial for minimizing pin count, reducing board space, and simplifying system design in complex digital systems.

A defining characteristic of the ADG728BRUZ is its **break-before-make switching action**. This essential feature ensures that the currently connected channel is fully disconnected before a new one is engaged, preventing any momentary shorting of analog sources. This is critical for protecting sensitive signal sources and maintaining signal integrity during channel switching transitions.

Performance-wise, this multiplexer excels with its low power consumption, a direct benefit of its CMOS construction, making it ideal for portable and battery-operated equipment. It offers a low on-resistance (typically 4.5 Ω) that remains exceptionally flat across the analog input range, minimizing distortion and power loss in the switched signal. Furthermore, the device operates from a single **1.8 V to 5.5 V supply**, making it perfectly suited for both 3 V and 5 V systems. The analog signal range extends from rail-to-rail (VSS to VDD), ensuring maximum dynamic range. The ADG728BRUZ also features **latch-up immunity**, a critical robustness attribute that prevents the device from failing due to overvoltage spikes on its inputs.

Housed in a compact 16-lead TSSOP package, the ADG728BRUZ finds its applications in diverse fields. It is perfectly suited for:

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

* **Communication Systems** for signal routing and gain switching.

* **Audio and Video Switching** in professional and consumer equipment.

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

* **Battery-Powered, Portable Instruments** due to its low power consumption.

ICGOODFIND: The ADG728BRUZ stands out as a highly integrated and efficient solution for analog signal routing. Its combination of a **serial interface for reduced control lines**, **low and flat on-resistance**, **wide supply voltage range**, and robust **latch-up immunity** makes it an exceptional choice for designers seeking to enhance performance and simplify layout in modern electronic systems.

**Keywords:**

1. **CMOS Analog Multiplexer**

2. **Serial Interface (SPI)**

3. **Break-Before-Make**

4. **Low On-Resistance**

5. **Latch-Up Immunity**