**ADG409BNZ: A Comprehensive Technical Overview of the Precision Quad 2:1 Multiplexer**
The ADG409BNZ from Analog Devices represents a pinnacle of performance in the realm of analog multiplexers, engineered for applications demanding high precision, low error, and robust signal integrity. As a **monolithic CMOS device**, it integrates four independent 2:1 multiplexers in a single package, offering designers a compact and reliable solution for routing analog or digital signals in complex systems.
At the heart of the ADG409BNZ's functionality is its ability to select one of two input channels for each of its four outputs based on the state of the digital address and enable pins. The device operates from a **single supply voltage ranging from +5V to +34V**, or from dual supplies of ±5V to ±20V, providing exceptional flexibility for both single-supply industrial systems and traditional bipolar analog circuitry. A key feature is its **break-before-make switching action**, which prevents momentary shorting between input channels during switching, thereby protecting sensitive source components and ensuring signal fidelity.
Performance is defined by its remarkably low on-resistance (RON) of typically 35Ω, which exhibits minimal variation across the specified signal range. This low and flat RON is critical as it minimizes signal attenuation and distortion. Furthermore, the device boasts an extremely **low leakage current of just 100pA max**, a parameter vital for applications involving high-impedance sources, such as precision data acquisition systems, sample-and-hold circuits, and automated test equipment (ATE).
The ADG409BNZ is designed with **TTL and CMOS-compatible digital inputs**, ensuring seamless interfacing with modern microcontrollers, FPGAs, and digital logic without requiring additional level-shifting circuitry. This compatibility simplifies design-in and reduces the overall component count on the board. Its architecture also ensures a high degree of isolation between channels and a very low off-channel leakage, preserving the integrity of unused signals.
Housed in a space-saving 16-lead PDIP or SOIC_N package, the ADG409BNZ is specified to operate over the industrial temperature range of -40°C to +85°C, making it suitable for a wide array of demanding environments, from factory automation to automotive and instrumentation systems.
**ICGOODFIND**: The ADG409BNZ stands out as an exemplary solution for high-accuracy signal routing, merging low power consumption with superior switching characteristics. Its combination of low on-resistance, high leakage current performance, and broad supply voltage range makes it an indispensable component for designers tackling challenges in precision measurement and signal processing.
**Keywords**: Precision Multiplexer, Low On-Resistance, Break-Before-Make, Low Leakage Current, CMOS Analog Switch.
