**The ADG451BRZ: A High-Performance, Low-Leakage CMOS SPST Switch for Precision Signal Routing**

In the realm of precision electronic systems, the accurate routing of analog signals is paramount. The performance of test and measurement equipment, data acquisition systems, and medical instrumentation hinges on the integrity of the signal path. A critical component in this path is the analog switch, which acts as a gatekeeper for signals. Among these, **the ADG451BRZ stands out as a premier single-pole/single-throw (SPST) switch**, engineered to deliver exceptional performance where it matters most: **ultra-low leakage and high precision**.

Constructed on an advanced CMOS process, the ADG451BRZ is designed to address the key challenges in precision signal routing. Its most lauded feature is its remarkably low leakage current. With **on-leakage (IS(ON)) and off-leakage (IS(OFF)) currents typically as low as 100pA at 25°C**, this switch effectively minimizes the introduction of errors. This is crucial when switching high-impedance sources or when maintaining the charge on a holding capacitor, as even nanoamps of leakage can lead to significant voltage drift and measurement inaccuracies.

Beyond its leakage characteristics, the ADG451BRZ offers a superior on-resistance (RON) of just 35Ω, which remains exceptionally flat across the input signal range. This low and linear RON ensures minimal signal distortion and power loss, preserving the fidelity of the transmitted waveform. The device operates from a single supply ranging from +5 V to +44 V or dual supplies up to ±22 V, providing the flexibility needed for a wide array of industrial and automotive applications.

Furthermore, the switch features **fast switching speeds, with tON typically at 150ns and tOFF at 100ns**, enabling its use in systems requiring rapid channel multiplexing. Its **TTL/CMOS compatible digital inputs simplify interface design** with modern microcontrollers and FPGAs, while the fail-safe circuitry guarantees that the switch remains off when no power is applied, protecting downstream circuitry.

**ICGOODFIND**: The ADG451BRZ is an exemplary solution for designers who cannot compromise on signal integrity. Its combination of **picosecond-level leakage currents, low and flat on-resistance, and robust supply range** makes it an indispensable component for precision analog systems, from automated test equipment to battery-powered medical devices, ensuring signals are routed with the highest accuracy and minimal error.

**Keywords**: Low Leakage Current, CMOS SPST Switch, Precision Signal Routing, High Performance, On-Resistance (RON)