**ADG708CRUZ: A Comprehensive Guide to the 8-Channel CMOS Analog Multiplexer**

In the world of electronic design, efficiently routing analog signals is a fundamental requirement across countless applications, from precision data acquisition systems to automated test equipment. The **ADG708CRUZ** from Analog Devices stands as a pivotal solution in this domain. This integrated circuit is an **8-channel single-ended analog multiplexer** designed on a low-power, high-performance CMOS process. It serves as a sophisticated electronic switch, allowing a single output to be connected to any one of eight independent inputs, or vice versa, under the control of a digital interface.

The primary function of the ADG708CRUZ is to simplify system design by replacing multiple mechanical switches and relays. It offers significant advantages in terms of **size, reliability, and speed**. The device operates from a single supply voltage ranging from **1.8 V to 5.5 V**, making it exceptionally versatile for both 3.3 V and 5 V systems, including those powered by batteries or low-voltage sources. Its low power consumption is a critical feature for portable and power-sensitive applications.

A key performance metric for any analog switch is its **on-resistance (Ron)**. The ADG708CRUZ boasts a very low and flat on-resistance (typically 2.5 Ω with a 5 V supply), which is crucial for minimizing signal distortion and voltage errors, especially when switching low-level analog signals. Furthermore, it exhibits **excellent on-resistance matching** between channels, ensuring consistent performance regardless of which channel is selected.

The digital control interface is straightforward, requiring a 3-bit binary address (A0, A1, A2) to select the desired channel. An enable pin (/EN) is also provided, which when driven high, places all switches into a high-impedance off state, protecting the downstream circuitry. This digital input is **TTL/CMOS compatible**, ensuring easy interfacing with modern microcontrollers, FPGAs, and DSPs without requiring level shifters.

Beyond its basic switching capability, the ADG708CRUZ is engineered for signal integrity. It features **break-before-make switching action**, preventing momentary shorting between adjacent channels during transition. The device also offers **latch-up immunity**, a vital protection feature that ensures the IC is not damaged by voltage spikes outside the supply rails.

**Typical applications** for the ADG708CRUZ are vast and include:

* **Data Acquisition Systems (DAQ):** Multiplexing signals from multiple sensors (e.g., temperature, pressure) into a single analog-to-digital converter (ADC).

* **Communication Systems:** Routing audio and video signals.

* **Automated Test Equipment (ATE):** Directing test signals to various device pins under test.

* **Battery-Powered Instruments:** Thanks to its low power consumption and wide voltage range.

* **Sample-and-Hold Circuits:** and general-purpose analog signal routing.

When designing with this multiplexer, careful consideration of the analog input range is essential. While the ADG708CRUZ can handle signals that span from ground to VDD, signals exceeding the supply rails can cause latch-up or damage. For systems requiring bidirectional signal flow or higher integration, other members of the Analog Devices switch and multiplexer portfolio may be considered.

**ICGOOODFIND:** The ADG708CRUZ is an exceptional choice for designers seeking a reliable, high-performance, and compact solution for analog signal multiplexing. Its combination of **low on-resistance, wide voltage range, and robust digital control** makes it a versatile and dependable component for a wide spectrum of industrial, communications, and consumer applications.

**Keywords:** Analog Multiplexer, CMOS Switch, Low On-Resistance, Single-Supply Operation, Signal Integrity.