**ADP7118ARDZ-3: A 3V, 200mA Low-Noise LDO Linear Regulator for Precision Analog Applications**

In the realm of precision analog design, power integrity is paramount. Sensitive components such as high-resolution ADCs, DACs, precision amplifiers, and frequency sources like VCOs and PLLs demand a clean, stable, and noise-free supply voltage to achieve their specified performance. **The ADP7118ARDZ-3 from Analog Devices stands out as a premier solution**, engineered specifically to meet the stringent requirements of these noise-sensitive applications.

This low-dropout (LDO) linear regulator delivers a fixed **3V output with a maximum current of 200mA**. Its core strength lies in its exceptional ability to provide a remarkably clean output voltage. It achieves an **ultra-low output noise level of just 9 μV rms** (integrated from 100 Hz to 100 kHz), which is critical for minimizing phase noise in oscillators and improving the signal-to-noise ratio (SNR) in data conversion systems. Furthermore, it features an outstanding **power supply rejection ratio (PSRR) of 72 dB at 10 kHz**, effectively filtering out ripple and noise originating from the upstream switching regulator or power source.

Beyond its noise performance, the ADP7118ARDZ-3 is designed for robustness and stability. It operates with a very low dropout voltage of 240 mV at 200 mA load, enhancing power efficiency and allowing operation with a wider input voltage range (3.3V to 20V). The device is stable with a small, space-saving 1 μF ceramic output capacitor, making it an ideal choice for compact PCB designs. Additional key features include current limit and thermal overload protection, ensuring safe operation under fault conditions.

Housed in a thermally enhanced **8-lead SOIC package**, the ADP7118ARDZ-3 offers an excellent balance of performance, size, and reliability. It is perfectly suited for a wide array of applications, including medical instrumentation, test and measurement equipment, industrial and aerospace systems, and high-fidelity audio systems where precision is non-negotiable.

**ICGOODFIND:** The ADP7118ARDZ-3 is an exceptional LDO regulator that sets a high standard for powering precision analog circuits. Its combination of ultra-low noise, high PSRR, and robust performance in a compact form factor makes it an indispensable component for designers striving to maximize system accuracy and dynamic range.

**Keywords:** **Low-Noise LDO**, **Precision Analog**, **High PSRR**, **200mA Regulator**, **3V Output**