**ADP7118ARDZ-5: A Comprehensive Guide to the 5V, 200mA Low-Noise LDO Regulator**
In the world of precision electronics, clean and stable power is not a luxury—it's a necessity. Sensitive components like analog-to-digital converters (ADCs), digital-to-analog converters (DACs), oscillators, and sensors demand a power supply free from noise and ripple to perform at their best. This is where Low-Dropout (LDO) linear regulators like the **ADP7118ARDZ-5** come into play, offering a superior solution for noise-critical applications.
The ADP7118ARDZ-5 is a specific model from Analog Devices' high-performance LDO family, factory-set to deliver a precise **5V output from an input voltage ranging from 2.7V to 5.5V**. With a maximum output current of **200mA**, it is perfectly suited for powering low-power subsystems and noise-sensitive load circuits.
**Key Features and Advantages**
What sets the ADP7118ARDZ-5 apart from standard regulators is its exceptional ability to manage noise. It boasts an **ultra-low output noise level of just 9 μV rms** (integrated from 100 Hz to 100 kHz). This is achieved through an innovative design that includes an integrated **silicon gate** for the pass element, which significantly reduces noise compared to traditional MOSFET-based LDOs.
Furthermore, its excellent **power supply rejection ratio (PSRR)** is a critical performance metric. It offers a PSRR of up to 72 dB at 10 kHz, meaning it effectively attenuates ripples and noise coming from the input power source (such as a switching regulator), preventing them from reaching the output. This "clean-up" function is invaluable in mixed-signal designs where noisy digital circuits share a power bus with analog components.
The device operates with a **low dropout voltage of typically 110 mV at 200 mA load**, allowing it to continue regulating effectively even when the input voltage dips very close to the output level. This maximizes efficiency and extends battery life in portable equipment.
Housed in a compact **8-lead SOIC package**, the ADP7118ARDZ-5 also incorporates essential protection features like **current limiting and thermal overload protection**, safeguarding both the regulator and the load under fault conditions.
**Typical Applications**
The combination of low noise and high PSRR makes the ADP7118ARDZ-5 an ideal choice for a wide range of applications, including:
* Powering **RF and microwave components** like PLLs and VCOs.
* Providing clean supply rails for **high-precision ADCs and DACs**.
* **Post-regulation** after a switching DC-DC converter.
* **Medical instrumentation** and **test and measurement equipment**.
* **Battery-powered devices** requiring stable voltage with low quiescent current.
**ICGOODFIND:** The ADP7118ARDZ-5 stands out as a premier solution for engineers who cannot compromise on power quality. Its exceptional **ultra-low noise and high PSRR performance** make it an indispensable component for ensuring the integrity and accuracy of sensitive analog and RF circuits, ultimately elevating the overall performance of the end system.
**Keywords:**
1. **Low-Noise LDO Regulator**
2. **5V Output**
3. **High PSRR**
4. **200mA Output Current**
5. **Precision Analog Power**
