**ADG528ATQ: A High-Performance, Fault-Protected 8-Channel Analog Multiplexer**

In the realm of precision signal routing and data acquisition systems, the integrity of analog signals is paramount. The **ADG528ATQ** stands out as a premier solution, engineered to deliver exceptional performance while providing robust protection against potentially damaging fault conditions. This 8-channel monolithic CMOS analog multiplexer is designed to address the critical challenges faced in industrial, telecommunications, and automated test equipment (ATE) applications.

The core functionality of the ADG528ATQ is to select one of eight analog input signals and connect it to a common output, based on a 3-bit binary address. Its **high-performance characteristics** are evident in its low on-resistance (typically 300 Ω), which remains exceptionally flat across the entire analog input range, ensuring minimal signal distortion. Furthermore, it boasts a very low leakage current, a critical factor for maintaining accuracy in high-impedance measurement systems.

A defining feature of this multiplexer is its **advanced fault protection**. The ADG528ATQ is built to withstand continuous overvoltage fault conditions on any analog input channel, even when the device's power supplies are absent. These fault voltages can range from -40V to +40V, far exceeding the typical supply rails. This capability is invaluable in harsh electrical environments where sensor faults or wiring errors could otherwise destroy a standard multiplexer and damage sensitive downstream circuitry, such as analog-to-digital converters (ADCs) or operational amplifiers.

The architecture ensures that when a fault occurs, the channel in question is effectively isolated. The multiplexer prevents **latch-up** and limits fault currents to safe levels, typically under 5 mA. Crucially, the signal path of the other, non-faulting channels remains completely unaffected, guaranteeing uninterrupted system operation. This robust protection is complemented by its **break-before-make switching action**, which eliminates momentary shorting between channels during switching, further enhancing signal integrity.

Housed in a compact and robust TQFP package, the ADG528ATQ is suited for space-constrained applications requiring high reliability. Its combination of low power consumption, fast switching speeds, and superior fault tolerance makes it an indispensable component for designers who cannot compromise on system robustness or signal fidelity.

**ICGOOODFIND**: The ADG528ATQ is an industry benchmark for protected analog multiplexing, offering an unparalleled blend of precision performance and rugged resilience against real-world electrical hazards.

**Keywords**: Fault Protection, Analog Multiplexer, Overvoltage Tolerance, Signal Integrity, Low On-Resistance.