**ADP7142AUJZ-3-R7: A High-Performance 3V LDO Voltage Regulator for Precision Applications**

In the realm of modern electronics, the demand for clean, stable, and noise-free power is paramount, especially for sensitive analog and digital circuits. The **ADP7142AUJZ-3-R7** from Analog Devices stands out as a premier solution, engineered specifically to meet the rigorous requirements of precision applications. This **high-performance, low-dropout (LDO) voltage regulator** delivers a fixed, highly accurate 3.0V output, making it an indispensable component for powering critical system loads such as high-speed converters, precision sensors, and RF instrumentation.

A defining characteristic of the ADP7142 is its **exceptionally low output noise performance**, typically measuring just 9 μV√Hz. This ultra-low noise floor is crucial for applications where even minor power supply fluctuations can degrade signal integrity and overall system accuracy. Furthermore, the device boasts an outstanding **power supply rejection ratio (PSRR)** of up to 75 dB at 10 kHz. This high PSRR effectively blocks unwanted AC ripples and noise from the input supply, ensuring a pristine DC output even when the input is sourced from noisy switching regulators or other imperfect power sources.

Beyond its noise performance, the ADP7142 is designed for robustness and reliability. It operates with a very low dropout voltage of only 135 mV at a 200 mA load, enhancing power efficiency and allowing it to function effectively even as the input voltage approaches the output level. The device incorporates vital protection features, including **current limiting and thermal shutdown**, safeguarding both the regulator and the downstream circuitry under fault conditions. Its compact, 5-lead TSOT package is ideal for space-constrained PCB designs, offering excellent thermal performance.

Typical applications that benefit from its capabilities include:

* Medical imaging and diagnostic equipment

* High-resolution data acquisition systems (DAQ)

* Test and measurement instrumentation

* Wireless communication base stations

* Precision analog front-ends (AFEs)

**ICGOODFIND**: The ADP7142AUJZ-3-R7 is a superior choice for designers who cannot compromise on power quality. Its best-in-class combination of **ultra-low noise, high PSRR, and excellent line/load regulation** provides a quiet and stable power foundation, which is essential for maximizing the performance and accuracy of today's most demanding precision electronic systems.

**Keywords**: Low-Dropout (LDO) Regulator, Ultra-Low Noise, High PSRR, Precision Applications, Voltage Regulation.